# 14 Comae Berenices

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Star in the constellation Coma Berenices

14 Comae Berenices Location of 14 Com (circled) Observation data Epoch J2000 Equinox J2000 Constellation Coma Berenices Right ascension 12h 26m 24.06442s[1] Declination +27° 16′ 05.6598″[1] Apparent magnitude (V) 4.95[2] Characteristics Evolutionary stage subgiant[1] Spectral type F0p[3][4] U−B color index +0.18[2] B−V color index +0.277±0.018[5] Astrometry Radial velocity (Rv) −2.20[6] km/s Proper motion (μ) RA: −15.874[1] mas/yr Dec.: −11.784[1] mas/yr Parallax (π) 11.2826±0.1085 mas[1] Distance 289 ± 3 ly (88.6 ± 0.9 pc) Absolute magnitude (MV) +0.35[7] Details Mass 1.6[8] M☉ Radius 4.8[8] R☉ Luminosity 56[8] L☉ Surface gravity (log g) 3.27[8] cgs Temperature 7,170[8] K Rotation 1.272 days[9] Rotational velocity (v sin i) 226[7] km/s Age 500[1] Myr Other designations 14 Com, AAVSO 1221+27, BD+28°2115, FK5 2997, HD 108283, HIP 60697, HR 4733, SAO 82310[10] Database references SIMBAD data

**14 Comae Berenices** is a single[3] [star](/source/Star) in the northern [constellation](/source/Constellation) of [Coma Berenices](/source/Coma_Berenices), and is the second brightest[11] member of the [Coma Star Cluster](/source/Coma_Star_Cluster).[3] It is a faint star but visible to the naked eye with an [apparent visual magnitude](/source/Apparent_visual_magnitude) of 4.95.[2] [Parallax](/source/Stellar_parallax) measurements place the star at a distance of about 289 [light years](/source/Light_year).[1]

The [spectrum](/source/Stellar_spectrum) of this star is [peculiar](/source/Peculiar_star) and it has been assigned a number of different [stellar classifications](/source/Stellar_classification): A5, F0p, F0 III Sr, F0 vp,[3] F1 IV: np Sr shell,[5] A9 IV np Sr II,[12] F1 IV,[13] and A9 V + shell.[14] Abt & Morrell (1995) designated this a [Lambda Boötis star](/source/Lambda_Bo%C3%B6tis_star) but this was later refuted.[12] No [surface magnetic field](/source/Stellar_magnetic_field) has been detected on 14 Comae Berenices.[15]

14 Comae Berenices is a well-known[14] [shell star](/source/Shell_star) with a high rate of spin, showing a [projected rotational velocity](/source/Projected_rotational_velocity) of 226 km/s.[7] This is giving the star an [oblate](/source/Oblate_spheroid) shape with an [equatorial bulge](/source/Equatorial_bulge) that is 12% larger than the polar radius.[4] It is radiating 56 times the [Sun's luminosity](/source/Sun's_luminosity) from its [photosphere](/source/Photosphere) at an [effective temperature](/source/Effective_temperature) of 7,170 [K](/source/Kelvin).[8]

## References

1. ^ [***a***](#cite_ref-GaiaDR3_1-0) [***b***](#cite_ref-GaiaDR3_1-1) [***c***](#cite_ref-GaiaDR3_1-2) [***d***](#cite_ref-GaiaDR3_1-3) [***e***](#cite_ref-GaiaDR3_1-4) [***f***](#cite_ref-GaiaDR3_1-5) [***g***](#cite_ref-GaiaDR3_1-6) [***h***](#cite_ref-GaiaDR3_1-7) 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%3D4009103588563247104%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-ducati2002_2-0) [***b***](#cite_ref-ducati2002_2-1) [***c***](#cite_ref-ducati2002_2-2) Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". *CDS/ADC Collection of Electronic Catalogues*. **2237**. [Bibcode](/source/Bibcode_(identifier)):[2002yCat.2237....0D](https://ui.adsabs.harvard.edu/abs/2002yCat.2237....0D).

1. ^ [***a***](#cite_ref-Elazm1993_3-0) [***b***](#cite_ref-Elazm1993_3-1) [***c***](#cite_ref-Elazm1993_3-2) [***d***](#cite_ref-Elazm1993_3-3) Abou Elazm, M. S. (October 1993), "The composite spectrum of the A type star 14 Comae", *Astrophysics and Space Science*, **208** (1): 1–4, [Bibcode](/source/Bibcode_(identifier)):[1993Ap&SS.208....1A](https://ui.adsabs.harvard.edu/abs/1993Ap&SS.208....1A), [doi](/source/Doi_(identifier)):[10.1007/BF00658127](https://doi.org/10.1007%2FBF00658127), [S2CID](/source/S2CID_(identifier)) [123520053](https://api.semanticscholar.org/CorpusID:123520053)

1. ^ [***a***](#cite_ref-Belle2012_4-0) [***b***](#cite_ref-Belle2012_4-1) van Belle, Gerard T. (March 2012), "Interferometric observations of rapidly rotating stars", *The Astronomy and Astrophysics Review*, **20** (1): 51, [arXiv](/source/ArXiv_(identifier)):[1204.2572](https://arxiv.org/abs/1204.2572), [Bibcode](/source/Bibcode_(identifier)):[2012A&ARv..20...51V](https://ui.adsabs.harvard.edu/abs/2012A&ARv..20...51V), [doi](/source/Doi_(identifier)):[10.1007/s00159-012-0051-2](https://doi.org/10.1007%2Fs00159-012-0051-2), [S2CID](/source/S2CID_(identifier)) [119273474](https://api.semanticscholar.org/CorpusID:119273474)

1. ^ [***a***](#cite_ref-Anderson2012_5-0) [***b***](#cite_ref-Anderson2012_5-1) 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. **[^](#cite_ref-Gontcharov2006_6-0)** Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 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. ^ [***a***](#cite_ref-pizzolato_7-0) [***b***](#cite_ref-pizzolato_7-1) [***c***](#cite_ref-pizzolato_7-2) Pizzolato, N.; et al. (2000). "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases". *Astronomy and Astrophysics*. **361**: 614. [Bibcode](/source/Bibcode_(identifier)):[2000A&A...361..614P](https://ui.adsabs.harvard.edu/abs/2000A&A...361..614P).

1. ^ [***a***](#cite_ref-tic_8-0) [***b***](#cite_ref-tic_8-1) [***c***](#cite_ref-tic_8-2) [***d***](#cite_ref-tic_8-3) [***e***](#cite_ref-tic_8-4) [***f***](#cite_ref-tic_8-5) Stassun, Keivan G.; et al. (2019). ["The Revised TESS Input Catalog and Candidate Target List"](https://doi.org/10.3847%2F1538-3881%2Fab3467). *The Astronomical Journal*. **158** (4): 138. [arXiv](/source/ArXiv_(identifier)):[1905.10694](https://arxiv.org/abs/1905.10694). [Bibcode](/source/Bibcode_(identifier)):[2019AJ....158..138S](https://ui.adsabs.harvard.edu/abs/2019AJ....158..138S). [doi](/source/Doi_(identifier)):[10.3847/1538-3881/ab3467](https://doi.org/10.3847%2F1538-3881%2Fab3467).

1. **[^](#cite_ref-balona2022_9-0)** Balona, L. A. (2022). ["Rapidly oscillating TESS A-F main-sequence stars: Are the roAp stars a distinct class?"](https://doi.org/10.1093%2Fmnras%2Fstac011). *Monthly Notices of the Royal Astronomical Society*. **510** (4): 5743. [arXiv](/source/ArXiv_(identifier)):[2109.02246](https://arxiv.org/abs/2109.02246). [Bibcode](/source/Bibcode_(identifier)):[2022MNRAS.510.5743B](https://ui.adsabs.harvard.edu/abs/2022MNRAS.510.5743B). [doi](/source/Doi_(identifier)):[10.1093/mnras/stac011](https://doi.org/10.1093%2Fmnras%2Fstac011).

1. **[^](#cite_ref-SIMBAD_10-0)** ["14 Com"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=14+Com). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2019-01-02.

1. **[^](#cite_ref-dominy_11-0)** Dominy, J. F.; Smith, M. A. (1977). "A spectroscopic study of 14 Comae and other A-type shell stars". *Astrophysical Journal*. **217**: 494. [Bibcode](/source/Bibcode_(identifier)):[1977ApJ...217..494D](https://ui.adsabs.harvard.edu/abs/1977ApJ...217..494D). [doi](/source/Doi_(identifier)):[10.1086/155598](https://doi.org/10.1086%2F155598).

1. ^ [***a***](#cite_ref-Murphy2015_12-0) [***b***](#cite_ref-Murphy2015_12-1) Murphy, Simon J.; et al. (October 2015), "An Evaluation of the Membership Probability of 212 λ Boo Stars. I. A Catalogue", *Publications of the Astronomical Society of Australia*, **32**: 43, [arXiv](/source/ArXiv_(identifier)):[1508.03633](https://arxiv.org/abs/1508.03633), [Bibcode](/source/Bibcode_(identifier)):[2015PASA...32...36M](https://ui.adsabs.harvard.edu/abs/2015PASA...32...36M), [doi](/source/Doi_(identifier)):[10.1017/pasa.2015.34](https://doi.org/10.1017%2Fpasa.2015.34), [S2CID](/source/S2CID_(identifier)) [59405545](https://api.semanticscholar.org/CorpusID:59405545), e036

1. **[^](#cite_ref-gray2001_13-0)** Gray, R. O.; et al. (2001). "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars". *The Astronomical Journal*. **121** (4): 2148. [Bibcode](/source/Bibcode_(identifier)):[2001AJ....121.2148G](https://ui.adsabs.harvard.edu/abs/2001AJ....121.2148G). [doi](/source/Doi_(identifier)):[10.1086/319956](https://doi.org/10.1086%2F319956).

1. ^ [***a***](#cite_ref-Abt1999_14-0) [***b***](#cite_ref-Abt1999_14-1) 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. **[^](#cite_ref-Kudryavtsev2006_15-0)** Kudryavtsev, D. O.; et al. (November 2006). ["New magnetic chemically peculiar stars"](https://doi.org/10.1111%2Fj.1365-2966.2006.10994.x). *Monthly Notices of the Royal Astronomical Society*. **372** (4): 1804–1828. [Bibcode](/source/Bibcode_(identifier)):[2006MNRAS.372.1804K](https://ui.adsabs.harvard.edu/abs/2006MNRAS.372.1804K). [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2006.10994.x](https://doi.org/10.1111%2Fj.1365-2966.2006.10994.x).

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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Adapted from the Wikipedia article [14 Comae Berenices](https://en.wikipedia.org/wiki/14_Comae_Berenices) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/14_Comae_Berenices?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.