# 17 Comae Berenices

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Multiple star system in the constellation Coma Berenices

17 Comae Berenices Location of 17 Com (circled) Observation data Epoch J2000.0 Equinox ICRS Constellation Coma Berenices 17 Com A Right ascension 12h 28m 54.702s[1] Declination +25° 54′ 46.27″[1] Apparent magnitude (V) 5.242±0.004[2] 17 Com B Right ascension 12h 28m 44.565s[3] Declination +25° 53′ 57.56″[3] Apparent magnitude (V) 6.635[4] 17 Com C Right ascension 12h 28m 44.579s[5] Declination +25° 53′ 56.00″[5] Apparent magnitude (V) 13.7[6] Characteristics 17 Com A Spectral type A0p[7] A0 SrCrEu[2] B−V color index −0.056±0.009[8] Variable type α2 CVn + δ Sct(?)[9] 17 Com B Evolutionary stage main sequence[3] Spectral type kA2hA9VmF0[10] U−B color index 0.084[4] B−V color index 0.216[4] Astrometry 17 Com A Radial velocity (Rv) −1.4±0.5[11] km/s Proper motion (μ) RA: −23.071 mas/yr[1] Dec.: −15.110 mas/yr[1] Parallax (π) 12.9991±0.3721 mas[1] Distance 251 ± 7 ly (77 ± 2 pc) Absolute magnitude (MV) 0.98[8] 17 Com B Radial velocity (Rv) −1.8±0.1[12] km/s Proper motion (μ) RA: −22.231 mas/yr[3] Dec.: −17.055 mas/yr[3] Parallax (π) 13.9752±0.0872 mas[3] Distance 233 ± 1 ly (71.6 ± 0.4 pc) Absolute magnitude (MV) 2.46[8] Orbit[13] Primary 17 Com B Name 17 Com C Period (P) 68.290±0.012 d Eccentricity (e) 0.296±0.008 Periastron epoch (T) 2,448,313.4±0.4 JD Argument of periastron (ω) (secondary) 260.7±2.2° Semi-amplitude (K1) (primary) 14.0±0.2 km/s Details 17 Com A Mass 2.38 M☉[2] 2.61 M☉[14] 2.75±0.3[15] M☉ Radius 2.09[7] R☉ Luminosity 42.7[7] L☉ Surface gravity (log g) 4.27 cgs[14] 3.70±0.20[15] cgs Temperature 10,212 K[7] 9,309±250[15] K Rotational velocity (v sin i) 20.4±0.4[7] km/s Age 101[14] Myr 17 Com B Mass 1.74±0.6[16] M☉ Radius 1.7[17] R☉ Luminosity 8.9[17] L☉ Surface gravity (log g) 4.29±0.20[16] cgs Temperature 8,068±200[16] K Rotational velocity (v sin i) 22[4] km/s 17 Com C Mass 0.61[17] M☉ Radius 0.62[17] R☉ Luminosity 0.101[17] L☉ Temperature 4,107[17] K Other designations BU 1080, 17 Com, ADS 8568, WDS J12289+2555[18][19] 17 Com A: AI Com, BD+26°2354, GC 17012, HD 108662, HIP 60904, HR 4752, SAO 82330[18] 17 Com B: BD+26°2353, GC 17007, HD 108651, HIP 60891, HR 4751, SAO 82328[19] Database references SIMBAD 17 Com A 17 Com B 17 Com C

**17 Comae Berenices** (17 Com) is a multiple [star system](/source/Star_system) in the northern [constellation](/source/Constellation) of [Coma Berenices](/source/Coma_Berenices). The brighter component, 17 Com A, is a [naked eye](/source/Naked_eye) star with an [apparent visual magnitude](/source/Apparent_visual_magnitude) of 5.2.[2] It has a companion of magnitude 6.6, 17 Com B, positioned at an [angular separation](/source/Angular_separation) of 146.4[″](/source/Second_of_arc) along a [position angle](/source/Position_angle) of 251°, as of 2018, and a 14th-magnitude companion 1.4″ from 17 Com B. They are located at a distance of approximately 240 [light years](/source/Light_year) from the [Sun](/source/Sun) based on [parallax](/source/Stellar_parallax) measurements.[1]

A 145" Ba 68.3 days Bb 1.4" C

Hierarchy of orbits in the 14 Ceti system[6]

The double nature of this system was documented by [F. G. W. Struve](/source/Friedrich_Georg_Wilhelm_von_Struve) in 1836.[20] The pair share a [common proper motion](/source/Common_proper_motion) through space[15] and thus may be associated. Component B is itself a [binary star](/source/Binary_star) system, although only the brighter component is visible in the [spectrum](/source/Stellar_spectrum).[13] The [Washington Double Star Catalogue](/source/Washington_Double_Star_Catalogue) lists the companion as component C, with a magnitude of 13.7 and a separation of 1.4[″](/source/Second_of_arc).[20] The 17 Com stars have been recognized as members of the [Coma Star Cluster](/source/Coma_Star_Cluster),[21] but this is disputed.[22]

The star 17 Com A was classified as [chemically peculiar](/source/Chemically_peculiar_star) by [A. J. Cannon](/source/Annie_Jump_Cannon) prior to 1918.[23] [W. W. Morgan](/source/William_Wilson_Morgan) in 1932 found the star's [spectral lines](/source/Spectral_line) varied in strength and appearance,[24] and detected lines of the element [europium](/source/Europium).[25] [H. W. Babcock](/source/Horace_W._Babcock) and [T. G. Cowling](/source/Thomas_Cowling) measured the [Zeeman effect](/source/Zeeman_effect) in this star, demonstrating in 1953 that it has a [magnetic field](/source/Stellar_magnetic_field).[26] In 1967, [E. P. J. van den Heuvel](/source/Ed_van_den_Heuvel) noted the [blue excess](/source/Color_index) of this star, suggesting it is a [blue straggler](/source/Blue_straggler).[27] [G. W. Preston](https://en.wikipedia.org/w/index.php?title=George_W._Preston&action=edit&redlink=1) and associates in 1969 found that the luminosity and magnetic field of this star varied in strength with a time scale of around five days.[28]

A [light curve](/source/Light_curve) for AI Comae Berenices, plotted from *[TESS](/source/Transiting_Exoplanet_Survey_Satellite)* data[29]

17 Com A is a magnetic [chemically peculiar](/source/Chemically_peculiar_star) [Ap star](/source/Ap_star) with a [stellar classification](/source/Stellar_classification) of A0p[7] or A0 SrCrEu,[2] with the latter indicating the [spectrum](/source/Stellar_spectrum) shows abundance anomalies of the elements [strontium](/source/Strontium), [chromium](/source/Chromium), and europium. The level of silicon in the atmosphere is also enhanced[30] and it shows a significant helium deficiency.[7] It has the [variable star designation](/source/Variable_star_designation) of AI Com, and is classified as an [Alpha2 Canum Venaticorum](/source/Alpha2_Canum_Venaticorum_variables) variable and a suspected [Delta Scuti variable](/source/Delta_Scuti_variable).[9] It has been identified as a suspected [blue straggler](/source/Blue_straggler).[15]

The primary has an estimated age of 101 million years[14] and is spinning with a [projected rotational velocity](/source/Projected_rotational_velocity) of 20 km/s.[7] It has more than double the mass and twice the radius of the Sun.[2][7] The magnetic field strength is 3,300±150 G.[7] It is radiating 43 times the luminosity of the Sun from its [photosphere](/source/Photosphere) at an [effective temperature](/source/Effective_temperature) of around 10,000 K.[7][15]

The co-moving companion, component B, is a single-lined [spectroscopic binary](/source/Spectroscopic_binary) with an [orbital period](/source/Orbital_period) of 68.3 days and an [eccentricity](/source/Orbital_eccentricity) (ovalness) of 0.3.[13] The visible member of this binary pair is a strong [Am star](/source/Am_star)[4] with a class of kA2hA9VmF0,[10] indicating it has the [Calcium K-lines](/source/Calcium_K-line) of an A0 star, the [hydrogen lines](/source/Hydrogen_lines) of an A9 star, and the metallic lines of an F0 star.[31]

## References

1. ^ [***a***](#cite_ref-GaiaDR3_A_1-0) [***b***](#cite_ref-GaiaDR3_A_1-1) [***c***](#cite_ref-GaiaDR3_A_1-2) [***d***](#cite_ref-GaiaDR3_A_1-3) [***e***](#cite_ref-GaiaDR3_A_1-4) Vallenari, A.; et al. (Gaia collaboration) (2023). ["*Gaia* Data Release 3. Summary of the content and survey properties"](https://doi.org/10.1051%2F0004-6361%2F202243940). *Astronomy and Astrophysics*. **674**: A1. [arXiv](/source/ArXiv_(identifier)):[2208.00211](https://arxiv.org/abs/2208.00211). [Bibcode](/source/Bibcode_(identifier)):[2023A&A...674A...1G](https://ui.adsabs.harvard.edu/abs/2023A&A...674A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202243940](https://doi.org/10.1051%2F0004-6361%2F202243940). [S2CID](/source/S2CID_(identifier)) [244398875](https://api.semanticscholar.org/CorpusID:244398875). [Gaia DR3 record for this source](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-source=+I%2F355&-from=nav&-nav=cat%3AI%2F355%26tab%3A%7BI%2F355%2Fgaiadr3%7D%26key%3Asource%3D1355%2Fgaiadr3%26HTTPPRM%3A%26-out.add%3D.%26Source%3D%3D%3D3960724252307532672%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-Paunzen_et_al_2021_2-0) [***b***](#cite_ref-Paunzen_et_al_2021_2-1) [***c***](#cite_ref-Paunzen_et_al_2021_2-2) [***d***](#cite_ref-Paunzen_et_al_2021_2-3) [***e***](#cite_ref-Paunzen_et_al_2021_2-4) [***f***](#cite_ref-Paunzen_et_al_2021_2-5) Paunzen, E.; et al. (July 2021), "Magnetic chemically peculiar stars investigated by the Solar Mass Ejection Imager", *Monthly Notices of the Royal Astronomical Society*, **504** (3): 3758–3772, [arXiv](/source/ArXiv_(identifier)):[2105.02206](https://arxiv.org/abs/2105.02206), [Bibcode](/source/Bibcode_(identifier)):[2021MNRAS.504.3758P](https://ui.adsabs.harvard.edu/abs/2021MNRAS.504.3758P), [doi](/source/Doi_(identifier)):[10.1093/mnras/stab1100](https://doi.org/10.1093%2Fmnras%2Fstab1100).

1. ^ [***a***](#cite_ref-GaiaDR3_B_3-0) [***b***](#cite_ref-GaiaDR3_B_3-1) [***c***](#cite_ref-GaiaDR3_B_3-2) [***d***](#cite_ref-GaiaDR3_B_3-3) [***e***](#cite_ref-GaiaDR3_B_3-4) Vallenari, A.; et al. (Gaia collaboration) (2023). ["*Gaia* Data Release 3. Summary of the content and survey properties"](https://doi.org/10.1051%2F0004-6361%2F202243940). *Astronomy and Astrophysics*. **674**: A1. [arXiv](/source/ArXiv_(identifier)):[2208.00211](https://arxiv.org/abs/2208.00211). [Bibcode](/source/Bibcode_(identifier)):[2023A&A...674A...1G](https://ui.adsabs.harvard.edu/abs/2023A&A...674A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202243940](https://doi.org/10.1051%2F0004-6361%2F202243940). [S2CID](/source/S2CID_(identifier)) [244398875](https://api.semanticscholar.org/CorpusID:244398875). [Gaia DR3 record for this source](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-source=+I%2F355&-from=nav&-nav=cat%3AI%2F355%26tab%3A%7BI%2F355%2Fgaiadr3%7D%26key%3Asource%3D1355%2Fgaiadr3%26HTTPPRM%3A%26-out.add%3D.%26Source%3D%3D%3D3960724286666918016%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-Iliev_et_al_2006_4-0) [***b***](#cite_ref-Iliev_et_al_2006_4-1) [***c***](#cite_ref-Iliev_et_al_2006_4-2) [***d***](#cite_ref-Iliev_et_al_2006_4-3) [***e***](#cite_ref-Iliev_et_al_2006_4-4) Iliev, I. Kh.; et al. (August 2006), "Abundance analysis of Am binaries and search for tidally driven abundance anomalies - II. HD861, HD18778, HD20320, HD29479, HD96528 and HD108651", *Monthly Notices of the Royal Astronomical Society*, **370** (2): 819–827, [Bibcode](/source/Bibcode_(identifier)):[2006MNRAS.370..819I](https://ui.adsabs.harvard.edu/abs/2006MNRAS.370..819I), [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2006.10513.x](https://doi.org/10.1111%2Fj.1365-2966.2006.10513.x), [S2CID](/source/S2CID_(identifier)) [56133360](https://api.semanticscholar.org/CorpusID:56133360).

1. ^ [***a***](#cite_ref-GaiaDR3_C_5-0) [***b***](#cite_ref-GaiaDR3_C_5-1) Vallenari, A.; et al. (Gaia collaboration) (2023). ["*Gaia* Data Release 3. Summary of the content and survey properties"](https://doi.org/10.1051%2F0004-6361%2F202243940). *Astronomy and Astrophysics*. **674**: A1. [arXiv](/source/ArXiv_(identifier)):[2208.00211](https://arxiv.org/abs/2208.00211). [Bibcode](/source/Bibcode_(identifier)):[2023A&A...674A...1G](https://ui.adsabs.harvard.edu/abs/2023A&A...674A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202243940](https://doi.org/10.1051%2F0004-6361%2F202243940). [S2CID](/source/S2CID_(identifier)) [244398875](https://api.semanticscholar.org/CorpusID:244398875). [Gaia DR3 record for this source](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-source=+I%2F355&-from=nav&-nav=cat%3AI%2F355%26tab%3A%7BI%2F355%2Fgaiadr3%7D%26key%3Asource%3D1355%2Fgaiadr3%26HTTPPRM%3A%26-out.add%3D.%26Source%3D%3D%3D3960724286666184576%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-msc_6-0) [***b***](#cite_ref-msc_6-1) Tokovinin, Andrei (2018). ["The Updated Multiple Star Catalog"](https://doi.org/10.3847%2F1538-4365%2Faaa1a5). *The Astrophysical Journal Supplement Series*. **235** (1): 6. [arXiv](/source/ArXiv_(identifier)):[1712.04750](https://arxiv.org/abs/1712.04750). [Bibcode](/source/Bibcode_(identifier)):[2018ApJS..235....6T](https://ui.adsabs.harvard.edu/abs/2018ApJS..235....6T). [doi](/source/Doi_(identifier)):[10.3847/1538-4365/aaa1a5](https://doi.org/10.3847%2F1538-4365%2Faaa1a5).

1. ^ [***a***](#cite_ref-Romanovskaya_et_al_2020_7-0) [***b***](#cite_ref-Romanovskaya_et_al_2020_7-1) [***c***](#cite_ref-Romanovskaya_et_al_2020_7-2) [***d***](#cite_ref-Romanovskaya_et_al_2020_7-3) [***e***](#cite_ref-Romanovskaya_et_al_2020_7-4) [***f***](#cite_ref-Romanovskaya_et_al_2020_7-5) [***g***](#cite_ref-Romanovskaya_et_al_2020_7-6) [***h***](#cite_ref-Romanovskaya_et_al_2020_7-7) [***i***](#cite_ref-Romanovskaya_et_al_2020_7-8) [***j***](#cite_ref-Romanovskaya_et_al_2020_7-9) [***k***](#cite_ref-Romanovskaya_et_al_2020_7-10) Romanovskaya, A. M.; et al. (September 2020), "Fundamental parameters of Ap-star HD 108662", *INASAN Science Reports*, **5** (4): 219–223, [arXiv](/source/ArXiv_(identifier)):[2006.15950](https://arxiv.org/abs/2006.15950), [Bibcode](/source/Bibcode_(identifier)):[2020INASR...5..219R](https://ui.adsabs.harvard.edu/abs/2020INASR...5..219R), [doi](/source/Doi_(identifier)):[10.26087/INASAN.2020.5.4.010](https://doi.org/10.26087%2FINASAN.2020.5.4.010), [S2CID](/source/S2CID_(identifier)) [220250089](https://api.semanticscholar.org/CorpusID:220250089).

1. ^ [***a***](#cite_ref-Anderson_Francis_2012_8-0) [***b***](#cite_ref-Anderson_Francis_2012_8-1) [***c***](#cite_ref-Anderson_Francis_2012_8-2) Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", *Astronomy Letters*, **38** (5): 331, [arXiv](/source/ArXiv_(identifier)):[1108.4971](https://arxiv.org/abs/1108.4971), [Bibcode](/source/Bibcode_(identifier)):[2012AstL...38..331A](https://ui.adsabs.harvard.edu/abs/2012AstL...38..331A), [doi](/source/Doi_(identifier)):[10.1134/S1063773712050015](https://doi.org/10.1134%2FS1063773712050015), [S2CID](/source/S2CID_(identifier)) [119257644](https://api.semanticscholar.org/CorpusID:119257644).

1. ^ [***a***](#cite_ref-Samus_et_al_2017_9-0) [***b***](#cite_ref-Samus_et_al_2017_9-1) Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", *Astronomy Reports*, 5.1, **61** (1): 80–88, [Bibcode](/source/Bibcode_(identifier)):[2017ARep...61...80S](https://ui.adsabs.harvard.edu/abs/2017ARep...61...80S), [doi](/source/Doi_(identifier)):[10.1134/S1063772917010085](https://doi.org/10.1134%2FS1063772917010085), [S2CID](/source/S2CID_(identifier)) [125853869](https://api.semanticscholar.org/CorpusID:125853869).

1. ^ [***a***](#cite_ref-Abt_Cardona_1984_10-0) [***b***](#cite_ref-Abt_Cardona_1984_10-1) Abt, H. A.; Cardona, O. (1984), "The nature of the visual companions of AP and AM stars", *The Astrophysical Journal*, **276**: 266, [Bibcode](/source/Bibcode_(identifier)):[1984ApJ...276..266A](https://ui.adsabs.harvard.edu/abs/1984ApJ...276..266A), [doi](/source/Doi_(identifier)):[10.1086/161610](https://doi.org/10.1086%2F161610).

1. **[^](#cite_ref-Gontcharov2006_11-0)** Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", *Astronomy Letters*, **32** (11): 759–771, [arXiv](/source/ArXiv_(identifier)):[1606.08053](https://arxiv.org/abs/1606.08053), [Bibcode](/source/Bibcode_(identifier)):[2006AstL...32..759G](https://ui.adsabs.harvard.edu/abs/2006AstL...32..759G), [doi](/source/Doi_(identifier)):[10.1134/S1063773706110065](https://doi.org/10.1134%2FS1063773706110065), [S2CID](/source/S2CID_(identifier)) [119231169](https://api.semanticscholar.org/CorpusID:119231169).

1. **[^](#cite_ref-de_Bruijne_Eilers_2012_12-0)** de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", *Astronomy & Astrophysics*, **546**: 14, [arXiv](/source/ArXiv_(identifier)):[1208.3048](https://arxiv.org/abs/1208.3048), [Bibcode](/source/Bibcode_(identifier)):[2012A&A...546A..61D](https://ui.adsabs.harvard.edu/abs/2012A&A...546A..61D), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201219219](https://doi.org/10.1051%2F0004-6361%2F201219219), [S2CID](/source/S2CID_(identifier)) [59451347](https://api.semanticscholar.org/CorpusID:59451347), A61.

1. ^ [***a***](#cite_ref-Abt_Willmarth_1999_13-0) [***b***](#cite_ref-Abt_Willmarth_1999_13-1) [***c***](#cite_ref-Abt_Willmarth_1999_13-2) Abt, Helmut A.; Willmarth, Daryl W. (August 1999), "Binaries in the Praesepe and Coma Star Clusters and Their Implications for Binary Evolution", *The Astrophysical Journal*, **521** (2): 682–690, [Bibcode](/source/Bibcode_(identifier)):[1999ApJ...521..682A](https://ui.adsabs.harvard.edu/abs/1999ApJ...521..682A), [doi](/source/Doi_(identifier)):[10.1086/307569](https://doi.org/10.1086%2F307569), [S2CID](/source/S2CID_(identifier)) [119772785](https://api.semanticscholar.org/CorpusID:119772785).

1. ^ [***a***](#cite_ref-David_Hillenbrand_2015_14-0) [***b***](#cite_ref-David_Hillenbrand_2015_14-1) [***c***](#cite_ref-David_Hillenbrand_2015_14-2) [***d***](#cite_ref-David_Hillenbrand_2015_14-3) David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", *The Astrophysical Journal*, **804** (2): 146, [arXiv](/source/ArXiv_(identifier)):[1501.03154](https://arxiv.org/abs/1501.03154), [Bibcode](/source/Bibcode_(identifier)):[2015ApJ...804..146D](https://ui.adsabs.harvard.edu/abs/2015ApJ...804..146D), [doi](/source/Doi_(identifier)):[10.1088/0004-637X/804/2/146](https://doi.org/10.1088%2F0004-637X%2F804%2F2%2F146), [S2CID](/source/S2CID_(identifier)) [33401607](https://api.semanticscholar.org/CorpusID:33401607).

1. ^ [***a***](#cite_ref-Minier_Deal_2020a_15-0) [***b***](#cite_ref-Minier_Deal_2020a_15-1) [***c***](#cite_ref-Minier_Deal_2020a_15-2) [***d***](#cite_ref-Minier_Deal_2020a_15-3) [***e***](#cite_ref-Minier_Deal_2020a_15-4) [***f***](#cite_ref-Minier_Deal_2020a_15-5) Monier, Richard; Deal, Morgan (July 2020), "The Evolutionary Status of 17 Com, The Hottest Member of Coma Berenices", *Research Notes of the AAS*, **4** (7): 104, [Bibcode](/source/Bibcode_(identifier)):[2020RNAAS...4..104M](https://ui.adsabs.harvard.edu/abs/2020RNAAS...4..104M), [doi](/source/Doi_(identifier)):[10.3847/2515-5172/aba35a](https://doi.org/10.3847%2F2515-5172%2Faba35a), [S2CID](/source/S2CID_(identifier)) [225795832](https://api.semanticscholar.org/CorpusID:225795832), 104.

1. ^ [***a***](#cite_ref-Minier_Deal_2020b_16-0) [***b***](#cite_ref-Minier_Deal_2020b_16-1) [***c***](#cite_ref-Minier_Deal_2020b_16-2) Deal, Morgan; Monier, Richard (August 2020), "The Surface Abundances of 17 Com B: A Test for Self-consistent Evolutionary Models", *Research Notes of the AAS*, **4** (8): 144, [Bibcode](/source/Bibcode_(identifier)):[2020RNAAS...4..144D](https://ui.adsabs.harvard.edu/abs/2020RNAAS...4..144D), [doi](/source/Doi_(identifier)):[10.3847/2515-5172/abb01f](https://doi.org/10.3847%2F2515-5172%2Fabb01f), [S2CID](/source/S2CID_(identifier)) [225379385](https://api.semanticscholar.org/CorpusID:225379385), 144.

1. ^ [***a***](#cite_ref-hu2023_17-0) [***b***](#cite_ref-hu2023_17-1) [***c***](#cite_ref-hu2023_17-2) [***d***](#cite_ref-hu2023_17-3) [***e***](#cite_ref-hu2023_17-4) [***f***](#cite_ref-hu2023_17-5) Hardegree-Ullman, Kevin K.; Apai, Dániel; Bergsten, Galen J.; Pascucci, Ilaria; López-Morales, Mercedes (2023). ["Bioverse: A Comprehensive Assessment of the Capabilities of Extremely Large Telescopes to Probe Earth-like O2 Levels in Nearby Transiting Habitable-zone Exoplanets"](https://doi.org/10.3847%2F1538-3881%2Facd1ec). *The Astronomical Journal*. **165** (6): 267. [arXiv](/source/ArXiv_(identifier)):[2304.12490](https://arxiv.org/abs/2304.12490). [Bibcode](/source/Bibcode_(identifier)):[2023AJ....165..267H](https://ui.adsabs.harvard.edu/abs/2023AJ....165..267H). [doi](/source/Doi_(identifier)):[10.3847/1538-3881/acd1ec](https://doi.org/10.3847%2F1538-3881%2Facd1ec).

1. ^ [***a***](#cite_ref-SIMBAD_A_18-0) [***b***](#cite_ref-SIMBAD_A_18-1) ["HD 108662"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+108662). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2022-01-14.

1. ^ [***a***](#cite_ref-SIMBAD_B_19-0) [***b***](#cite_ref-SIMBAD_B_19-1) ["HD 108651"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+108651). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2022-01-14.

1. ^ [***a***](#cite_ref-Mason_et_al_2014_20-0) [***b***](#cite_ref-Mason_et_al_2014_20-1) Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", *The Astronomical Journal*, **122** (6): 3466–3471, [Bibcode](/source/Bibcode_(identifier)):[2001AJ....122.3466M](https://ui.adsabs.harvard.edu/abs/2001AJ....122.3466M), [doi](/source/Doi_(identifier)):[10.1086/323920](https://doi.org/10.1086%2F323920).

1. **[^](#cite_ref-Casewell_et_al_2006_21-0)** Casewell, S. L.; et al. (January 2006), "New stellar members of the Coma Berenices open star cluster", *Monthly Notices of the Royal Astronomical Society*, **365** (2): 447–453, [arXiv](/source/ArXiv_(identifier)):[astro-ph/0510133](https://arxiv.org/abs/astro-ph/0510133), [Bibcode](/source/Bibcode_(identifier)):[2006MNRAS.365..447C](https://ui.adsabs.harvard.edu/abs/2006MNRAS.365..447C), [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2005.09689.x](https://doi.org/10.1111%2Fj.1365-2966.2005.09689.x), [S2CID](/source/S2CID_(identifier)) [17595520](https://api.semanticscholar.org/CorpusID:17595520).

1. **[^](#cite_ref-Silaj_Landstreet_2014_22-0)** Silaj, J.; Landstreet, J. D. (June 2014), "Accurate age determinations of several nearby open clusters containing magnetic Ap stars", *Astronomy & Astrophysics*, **566**: 18, [arXiv](/source/ArXiv_(identifier)):[1407.4531](https://arxiv.org/abs/1407.4531), [Bibcode](/source/Bibcode_(identifier)):[2014A&A...566A.132S](https://ui.adsabs.harvard.edu/abs/2014A&A...566A.132S), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201321468](https://doi.org/10.1051%2F0004-6361%2F201321468), [S2CID](/source/S2CID_(identifier)) [53370832](https://api.semanticscholar.org/CorpusID:53370832), A132.

1. **[^](#cite_ref-Perrine1018_23-0)** Perrine, C. D. (June 1918), "On the cause underlying the spectral differences of the stars", *Astrophysical Journal*, **47**: 289–323, [Bibcode](/source/Bibcode_(identifier)):[1918ApJ....47..289P](https://ui.adsabs.harvard.edu/abs/1918ApJ....47..289P), [doi](/source/Doi_(identifier)):[10.1086/142406](https://doi.org/10.1086%2F142406).

1. **[^](#cite_ref-Morgan1932a_24-0)** Morgan, W. W. (September 1932), "A Study of the Composite Spectrum of the A-Type Star 14 Comae", *Astrophysical Journal*, **76**: 144, [Bibcode](/source/Bibcode_(identifier)):[1932ApJ....76..144M](https://ui.adsabs.harvard.edu/abs/1932ApJ....76..144M), [doi](/source/Doi_(identifier)):[10.1086/143410](https://doi.org/10.1086%2F143410).

1. **[^](#cite_ref-Morgan1932b_25-0)** Morgan, W. W. (January 1932), "Studies in Peculiar Stellar Spectra. III. on the Occurrence of Europium in A-Type Stars", *Astrophysical Journal*, **75**: 46, [Bibcode](/source/Bibcode_(identifier)):[1932ApJ....75...46M](https://ui.adsabs.harvard.edu/abs/1932ApJ....75...46M), [doi](/source/Doi_(identifier)):[10.1086/143354](https://doi.org/10.1086%2F143354).

1. **[^](#cite_ref-Babcock_Cowling_1953_26-0)** Babcock, H. W.; Cowling, T. G. (1953), "General magnetic fields in the Sun and stars (Report on progress of astronomy)", *Monthly Notices of the Royal Astronomical Society*, **113**: 357–381, [Bibcode](/source/Bibcode_(identifier)):[1953MNRAS.113..357B](https://ui.adsabs.harvard.edu/abs/1953MNRAS.113..357B), [doi](/source/Doi_(identifier)):[10.1093/mnras/113.3.357](https://doi.org/10.1093%2Fmnras%2F113.3.357).

1. **[^](#cite_ref-van_den_Heuvel_1967_27-0)** van den Heuvel, E. P. J. (April 1967), "The origin of blue stragglers and peculiar and metallic-line stars", *The Observatory*, **87**: 68–72, [Bibcode](/source/Bibcode_(identifier)):[1967Obs....87...68V](https://ui.adsabs.harvard.edu/abs/1967Obs....87...68V).

1. **[^](#cite_ref-Preston_et_al_1969_28-0)** Preston, G. W.; et al. (May 1969), "The magnetic field and light variations of 17 COM and kap Cnc", *Astrophysical Journal*, **156**: 653, [Bibcode](/source/Bibcode_(identifier)):[1969ApJ...156..653P](https://ui.adsabs.harvard.edu/abs/1969ApJ...156..653P), [doi](/source/Doi_(identifier)):[10.1086/149995](https://doi.org/10.1086%2F149995).

1. **[^](#cite_ref-MAST_29-0)** ["MAST: Barbara A. Mikulski Archive for Space Telescopes"](https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html). Space Telescope Science Institute. Retrieved 8 December 2021.

1. **[^](#cite_ref-Savanov_et_al_1996_30-0)** Savanov, I. S.; et al. (November 1996), "A study of the atmospheres of the SrCrEu stars 17 Com A and 21 Com in the Coma Cluster", *Astronomy Letters*, **22** (6): 815–821, [Bibcode](/source/Bibcode_(identifier)):[1996AstL...22..815S](https://ui.adsabs.harvard.edu/abs/1996AstL...22..815S).

1. **[^](#cite_ref-Gray_Corbally_2009_31-0)** Gray, Richard O.; Corbally, J. (2009), *Stellar Spectral Classification*, [Princeton University Press](/source/Princeton_University_Press), pp. 176–183, [ISBN](/source/ISBN_(identifier)) [978-0691125114](https://en.wikipedia.org/wiki/Special:BookSources/978-0691125114)

## External links

- Kaler, James B. (July 25, 2014), ["17 Comae Berenices"](http://stars.astro.illinois.edu/sow/17com.html), *Stars*, retrieved 2022-01-17

v t e Constellation of Coma Berenices List of stars in Coma Berenices Coma Berenices in Chinese astronomy Stars Bayer α (Diadem) β γ Flamsteed 7 11 12 13 14 16 17 21 23 (Phyllon Kissinou) 24 31 35 36 37 41 Variable FK GP IN LW HR 4668 HD 107146 108863 108874 110067 114762 b 115404 116029 Other 2MASS J12195156+3128497 KELT-6 WASP-56 WISE 1217+1626 Exoplanets HD 108874 b c KELT-6b Star clusters Coma Star Cluster Messier 53 NGC 4147 NGC 5053 Nebulae LoTr 5 Galaxies Messier 64 (Black Eye Galaxy) 85 88 91 98 99 100 NGC 4014 4015 4017 4053 4056 4060 4061 4065 4066 4070 4072 4074 4076 4084 4086 4089 4090 4091 4092 4093 4095 4098 4136 4146 4150 4162 4185 4189 4203 4211 4212 4213 4222 4237 4245 4253 4262 4274 4278 4293 4298 4302 4308 4310 4312 4314 4323 4328 4340 4359 4375 4383 4393 4394 4414 4419 4448 4450 4455 4459 4468 4473 4474 4475 4477 4479 4489 4494 4495 4498 4502 4506 4515 4516 4523 4525 4540 4555 4556 4558 4559 4561 4565 4571 4585 4595 4611 4614 4615 4633 4634 4651 4659 4670 4673 4676 (Mice Galaxies) 4689 4692 4710 4712 4725 4747 4839 4848 4860 4869 4871 4872 4873 4874 4875 4876 4881 4883 4886 4889 4892 4895 4907 4911 4919 4921 4944 5000 5004 5012 5032 5056 5172 Other 3C 275.1 3C 287 Arp 60 Coma Berenices Dragonfly 44 IC 755 (NGC 4019) IC 831 IC 860 IC 3505 IC 3528 IC 4040 IC 4051 IOK-1 IRAS F12032+1707 LEDA 83677 M85-HCC1 Malin 1 PGC 44691 PKS 1155+251 PKS 1222+216 VIRGOHI21 ZwCl 1305.4+2941 BCG Galaxy clusters Abell 1413 Coma I Coma Cluster Coma Supercluster M94 Group NGC 4065 Group NGC 4631 Group Astronomical events GRB 050509B iPTF14atg SN 1940B SN 1979C SN 2005ap SN 2006X SN 2020oi Category

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