# HR 5553

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Binary star system in the constellation Boötes

HR 5553 A visual band light curve for DE Boötes, adapted from Henry et al. (1995)[1] Observation data Epoch J2000 Equinox J2000 Constellation Boötes[2] Right ascension 14h 53m 23.76674s[3] Declination +19° 09′ 10.0813″[3] Apparent magnitude (V) 6.00[4] (5.97 to 6.04)[5] Characteristics Evolutionary stage main sequence[6] Spectral type K0 V[7] U−B color index +0.49[7] B−V color index +0.84[7] Variable type RS CVn[5] Astrometry Radial velocity (Rv) −29.82±0.15[8] km/s Proper motion (μ) RA: −442.23[3] mas/yr Dec.: +217.61[3] mas/yr Parallax (π) 86.88±0.46 mas[3] Distance 37.5 ± 0.2 ly (11.51 ± 0.06 pc) Absolute magnitude (MV) 5.69[9] Orbit[10] Period (P) 125.396±0.001 d Semi-major axis (a) 0.19±0.03 AU Eccentricity (e) 0.51±0.001 Inclination (i) 93.4±4.2° Longitude of the node (Ω) 248.3±3.6° Argument of periastron (ω) (secondary) 219±0.1° Details HR 5553 A Mass 0.84[11] M☉ Radius 0.87[6] R☉ Luminosity 0.498[11] L☉ Surface gravity (log g) 4.57[12] cgs Temperature 5,313[12] K Metallicity [Fe/H] 0.10[12] dex Rotation 10.4[12] Rotational velocity (v sin i) 4.0[12] km/s Age 0.7–1.3[13] Gyr HR 5553 B Mass 0.45[7] M☉ Radius 0.37[6] R☉ Luminosity 0.021[6] L☉ Temperature 3,596[6] K Other designations DE Boo, BD+19°2881, GJ 567, HD 131511, HIP 72848, LHS 5279[14] Database references SIMBAD data

**HR 5553** is a [binary star](/source/Binary_star) system located thirty-eight [light-years](/source/Light-year) away from the [Sun](/source/Sun), in the northern [constellation](/source/Constellation) [Boötes](/source/Bo%C3%B6tes). It has the [variable star designation](/source/Variable_star_designation) **DE Boötis**, and is classified as an [RS Canum Venaticorum variable](/source/RS_Canum_Venaticorum_variable) that ranges in [apparent visual magnitude](/source/Apparent_visual_magnitude) from 5.97 down to 6.04,[5] which is bright enough to be dimly visible to the [naked eye](/source/Naked_eye). The system is drifting closer to the [Sun](/source/Sun) with a [radial velocity](/source/Radial_velocity) of −30 km/s,[8] and is expected to come as close as 26.9 light-years in 210,000 years.[15]

Orbital elements for this single-lined [spectroscopic binary](/source/Spectroscopic_binary) was first calculated in 1981 using radial velocity measurements from [David Dunlap Observatory](/source/David_Dunlap_Observatory) combined with older measurements from [Mount Wilson Observatory](/source/Mount_Wilson_Observatory) and [Dominion Astrophysical Observatory](/source/Dominion_Astrophysical_Observatory).[16] The two stars orbit each other with a [period](/source/Orbital_period) of 125 days and a large [eccentricity](/source/Orbital_eccentricity) of 0.51.[7]

[Marcel Golay](/source/Marcel_Golay_(astronomer)) listed the star as a suspected variable star in 1973.[17] Gregory W. Henry *et al.* confirmed that it is a variable star in 1995.[1] It was given its variable star designation, DE Boötis, in 1997.[18]

The primary, designated component A, is a [K-type main sequence star](/source/K-type_main_sequence_star) with a [stellar classification](/source/Stellar_classification) of K0 V. It is around one[13] billion years old and is spinning with a [projected rotational velocity](/source/Projected_rotational_velocity) of 4 km/s.[12] The star has 84% of the [mass of the Sun](/source/Mass_of_the_Sun) and 86% of the [Sun's radius](/source/Sun's_radius).[11] It is radiating 50%[11] of the [luminosity of the Sun](/source/Luminosity_of_the_Sun) from its [photosphere](/source/Photosphere) at an [effective temperature](/source/Effective_temperature) of 5,313 K.[12] Component B has an estimated 45% of the mass of the Sun.[7]

An [infrared excess](/source/Infrared_excess) has been detected around this system, most likely indicating the presence of a [circumstellar disk](/source/Circumstellar_disk) at a radius of 34.2 [AU](/source/Astronomical_Unit). The temperature of this dust is 40 K.[12] The estimated mass of the dust is 0.0002 times the mass of the [Earth](/source/Earth). It is aligned to within 10° of the plane of the binary system.[11][10]

## References

1. ^ [***a***](#cite_ref-Henry_1-0) [***b***](#cite_ref-Henry_1-1) Henry, Gregory W.; Fekel, Francis C.; Hall, Douglas S. (December 1995). "An Automated Search for Variability in Chromospherically Active Stars". *The Astronomical Journal*. **110** (6): 2926–2967. [Bibcode](/source/Bibcode_(identifier)):[1995AJ....110.2926H](https://ui.adsabs.harvard.edu/abs/1995AJ....110.2926H). [doi](/source/Doi_(identifier)):[10.1086/117740](https://doi.org/10.1086%2F117740).

1. **[^](#cite_ref-constellation_2-0)** [Roman, Nancy G.](/source/Nancy_Roman) (1987). ["Identification of a constellation from a position"](https://doi.org/10.1086%2F132034). *[Publications of the Astronomical Society of the Pacific](/source/Publications_of_the_Astronomical_Society_of_the_Pacific)*. **99** (617): 695. [Bibcode](/source/Bibcode_(identifier)):[1987PASP...99..695R](https://ui.adsabs.harvard.edu/abs/1987PASP...99..695R). [doi](/source/Doi_(identifier)):[10.1086/132034](https://doi.org/10.1086%2F132034). [Constellation record for this object](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?source=VI%2F42%2Fout&%2F%2Ftables=VI%2F42%2Fout&-c=HR+5553&-c.eq=J2000&-c.r=++2&-c.u=arcmin&-c.geom=r&-source=&-source=VI%2F42%2Fout&-out=RA1875&-out=DE1875&-out=Cst) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-aaa474_2_653_3-0) [***b***](#cite_ref-aaa474_2_653_3-1) [***c***](#cite_ref-aaa474_2_653_3-2) [***d***](#cite_ref-aaa474_2_653_3-3) [***e***](#cite_ref-aaa474_2_653_3-4) van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", *Astronomy and Astrophysics*, **474** (2): 653–664, [arXiv](/source/ArXiv_(identifier)):[0708.1752v1](https://arxiv.org/abs/0708.1752v1), [Bibcode](/source/Bibcode_(identifier)):[2007A&A...474..653V](https://ui.adsabs.harvard.edu/abs/2007A&A...474..653V), [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20078357](https://doi.org/10.1051%2F0004-6361%3A20078357), [S2CID](/source/S2CID_(identifier)) [18759600](https://api.semanticscholar.org/CorpusID:18759600).

1. **[^](#cite_ref-MERMILLIOD_4-0)** Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", *Catalogue of Eggen's UBV Data. SIMBAD*, [Bibcode](/source/Bibcode_(identifier)):[1986EgUBV........0M](https://ui.adsabs.harvard.edu/abs/1986EgUBV........0M).

1. ^ [***a***](#cite_ref-Samus2017_5-0) [***b***](#cite_ref-Samus2017_5-1) [***c***](#cite_ref-Samus2017_5-2) Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017). "General catalogue of variable stars: Version GCVS 5.1". *Astronomy Reports*. **61** (1): 80. [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-boldog2023_6-0) [***b***](#cite_ref-boldog2023_6-1) [***c***](#cite_ref-boldog2023_6-2) [***d***](#cite_ref-boldog2023_6-3) [***e***](#cite_ref-boldog2023_6-4) Boldog, Á.; et al. (2023). "Glancing through the debris disk: Photometric analysis of DE Boo with CHEOPS". *Astronomy & Astrophysics*. **671**: A127. [arXiv](/source/ArXiv_(identifier)):[2302.02710](https://arxiv.org/abs/2302.02710). [Bibcode](/source/Bibcode_(identifier)):[2023A&A...671A.127B](https://ui.adsabs.harvard.edu/abs/2023A&A...671A.127B). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202245101](https://doi.org/10.1051%2F0004-6361%2F202245101).

1. ^ [***a***](#cite_ref-mnras447_1_L75_7-0) [***b***](#cite_ref-mnras447_1_L75_7-1) [***c***](#cite_ref-mnras447_1_L75_7-2) [***d***](#cite_ref-mnras447_1_L75_7-3) [***e***](#cite_ref-mnras447_1_L75_7-4) [***f***](#cite_ref-mnras447_1_L75_7-5) Kennedy, Grant M. (February 2015), "Nature or nurture of coplanar Tatooines: the aligned circumbinary Kuiper belt analogue around HD 131511", *Monthly Notices of the Royal Astronomical Society: Letters*, **447** (1): L75–L79, [arXiv](/source/ArXiv_(identifier)):[1412.0674](https://arxiv.org/abs/1412.0674), [Bibcode](/source/Bibcode_(identifier)):[2015MNRAS.447L..75K](https://ui.adsabs.harvard.edu/abs/2015MNRAS.447L..75K), [doi](/source/Doi_(identifier)):[10.1093/mnrasl/slu190](https://doi.org/10.1093%2Fmnrasl%2Fslu190), [S2CID](/source/S2CID_(identifier)) [53686506](https://api.semanticscholar.org/CorpusID:53686506).

1. ^ [***a***](#cite_ref-mnras349_1_1069_8-0) [***b***](#cite_ref-mnras349_1_1069_8-1) Karataș, Yüksel; Bilir, Selçuk; Eker, Zeki; Demircan, Osman; Liebert, James; Hawley, Suzanne L.; Fraser, Oliver J.; Covey, Kevin R.; Lowrance, Patrick; Kirkpatrick, J. Davy; Burgasser, Adam J. (2004). ["Kinematics of chromospherically active binaries and evidence of an orbital period decrease in binary evolution"](https://doi.org/10.1111%2Fj.1365-2966.2004.07588.x). *Monthly Notices of the Royal Astronomical Society*. **349** (3): 1069–1092. [arXiv](/source/ArXiv_(identifier)):[astro-ph/0404219](https://arxiv.org/abs/astro-ph/0404219). [Bibcode](/source/Bibcode_(identifier)):[2004MNRAS.349.1069K](https://ui.adsabs.harvard.edu/abs/2004MNRAS.349.1069K). [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2004.07588.x](https://doi.org/10.1111%2Fj.1365-2966.2004.07588.x). [S2CID](/source/S2CID_(identifier)) [15290475](https://api.semanticscholar.org/CorpusID:15290475).

1. **[^](#cite_ref-Holmberg2009_9-0)** Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", *Astronomy and Astrophysics*, **501** (3): 941–947, [arXiv](/source/ArXiv_(identifier)):[0811.3982](https://arxiv.org/abs/0811.3982), [Bibcode](/source/Bibcode_(identifier)):[2009A&A...501..941H](https://ui.adsabs.harvard.edu/abs/2009A&A...501..941H), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/200811191](https://doi.org/10.1051%2F0004-6361%2F200811191), [S2CID](/source/S2CID_(identifier)) [118577511](https://api.semanticscholar.org/CorpusID:118577511).

1. ^ [***a***](#cite_ref-Kennedy2015_10-0) [***b***](#cite_ref-Kennedy2015_10-1) Kennedy, G. M. (February 2015). ["Nature or nurture of coplanar Tatooines: the aligned circumbinary Kuiper Belt analogue around HD 131511"](https://doi.org/10.1093%2Fmnrasl%2Fslu190). *Monthly Notices of the Royal Astronomical Society*. **447** (1): L75–L79. [arXiv](/source/ArXiv_(identifier)):[1412.0674](https://arxiv.org/abs/1412.0674). [Bibcode](/source/Bibcode_(identifier)):[2015MNRAS.447L..75K](https://ui.adsabs.harvard.edu/abs/2015MNRAS.447L..75K). [doi](/source/Doi_(identifier)):[10.1093/mnrasl/slu190](https://doi.org/10.1093%2Fmnrasl%2Fslu190).

1. ^ [***a***](#cite_ref-aa570_A114_11-0) [***b***](#cite_ref-aa570_A114_11-1) [***c***](#cite_ref-aa570_A114_11-2) [***d***](#cite_ref-aa570_A114_11-3) [***e***](#cite_ref-aa570_A114_11-4) Marshall, J. P.; et al. (October 2014), "Interpreting the extended emission around three nearby debris disc host stars", *Astronomy & Astrophysics*, **570**: 13, [arXiv](/source/ArXiv_(identifier)):[1408.5649](https://arxiv.org/abs/1408.5649), [Bibcode](/source/Bibcode_(identifier)):[2014A&A...570A.114M](https://ui.adsabs.harvard.edu/abs/2014A&A...570A.114M), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201424517](https://doi.org/10.1051%2F0004-6361%2F201424517), [S2CID](/source/S2CID_(identifier)) [119232172](https://api.semanticscholar.org/CorpusID:119232172), A114.

1. ^ [***a***](#cite_ref-aa555_A11_12-0) [***b***](#cite_ref-aa555_A11_12-1) [***c***](#cite_ref-aa555_A11_12-2) [***d***](#cite_ref-aa555_A11_12-3) [***e***](#cite_ref-aa555_A11_12-4) [***f***](#cite_ref-aa555_A11_12-5) [***g***](#cite_ref-aa555_A11_12-6) [***h***](#cite_ref-aa555_A11_12-7) Eiroa, C.; et al. (July 2013), "DUst around NEarby Stars. The survey observational results", *Astronomy & Astrophysics*, **555**: A11, [arXiv](/source/ArXiv_(identifier)):[1305.0155](https://arxiv.org/abs/1305.0155), [Bibcode](/source/Bibcode_(identifier)):[2013A&A...555A..11E](https://ui.adsabs.harvard.edu/abs/2013A&A...555A..11E), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201321050](https://doi.org/10.1051%2F0004-6361%2F201321050), [S2CID](/source/S2CID_(identifier)) [377244](https://api.semanticscholar.org/CorpusID:377244).

1. ^ [***a***](#cite_ref-apj687_13-0) [***b***](#cite_ref-apj687_13-1) Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008), "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics", *The Astrophysical Journal*, **687** (2): 1264–1293, [arXiv](/source/ArXiv_(identifier)):[0807.1686](https://arxiv.org/abs/0807.1686), [Bibcode](/source/Bibcode_(identifier)):[2008ApJ...687.1264M](https://ui.adsabs.harvard.edu/abs/2008ApJ...687.1264M), [doi](/source/Doi_(identifier)):[10.1086/591785](https://doi.org/10.1086%2F591785), [S2CID](/source/S2CID_(identifier)) [27151456](https://api.semanticscholar.org/CorpusID:27151456).

1. **[^](#cite_ref-SIMBAD_14-0)** ["DE Boo"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=DE+Boo). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2019-12-07.

1. **[^](#cite_ref-Bailer2018_15-0)** Bailer-Jones, C.A.L.; et al. (2018). "New stellar encounters discovered in the second Gaia data release". *Astronomy & Astrophysics*. **616**: A37. [arXiv](/source/ArXiv_(identifier)):[1805.07581](https://arxiv.org/abs/1805.07581). [Bibcode](/source/Bibcode_(identifier)):[2018A&A...616A..37B](https://ui.adsabs.harvard.edu/abs/2018A&A...616A..37B). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201833456](https://doi.org/10.1051%2F0004-6361%2F201833456). [S2CID](/source/S2CID_(identifier)) [56269929](https://api.semanticscholar.org/CorpusID:56269929).

1. **[^](#cite_ref-Kamper1981_16-0)** Kamper, K. W.; Lyons, R. W. (1981). "The Spectroscopic Orbits of HD131511". *Journal of the Royal Astronomical Society of Canada*. **75**: 56–58. [Bibcode](/source/Bibcode_(identifier)):[1981JRASC..75...56K](https://ui.adsabs.harvard.edu/abs/1981JRASC..75...56K).

1. **[^](#cite_ref-Golay_17-0)** Golay, M. (1973). "Remarks on the Photometric Criteria of Choice of the Standard Stars". *Problems of Calibration of Absolute Magnitudes and Temperature of Stars*. Vol. 54. Boston: Reidel. pp. 275–297. [Bibcode](/source/Bibcode_(identifier)):[1973IAUS...54..275G](https://ui.adsabs.harvard.edu/abs/1973IAUS...54..275G). [doi](/source/Doi_(identifier)):[10.1007/978-94-010-2645-1_33](https://doi.org/10.1007%2F978-94-010-2645-1_33). [ISBN](/source/ISBN_(identifier)) [978-90-277-0372-9](https://en.wikipedia.org/wiki/Special:BookSources/978-90-277-0372-9).

1. **[^](#cite_ref-Kazarovets1997_18-0)** Kazarovets, E. V.; Samus, N. N. (April 1997). ["The 73rd Name-List of Variable Stars"](https://ibvs.konkoly.hu/pub/ibvs/4401/4471.pdf) (PDF). *Information Bulletin on Variable Stars*. **4471**: 1–45. [Bibcode](/source/Bibcode_(identifier)):[1997IBVS.4471....1K](https://ui.adsabs.harvard.edu/abs/1997IBVS.4471....1K). Retrieved 6 December 2024.

## External links

- ["**ARICNS**: 01173 (A)"](https://wwwadd.zah.uni-heidelberg.de/datenbanken/aricns/cnspages/4c4c01173.htm). *ARICNS*. [Centre of Astronomy](/source/Center_of_Astronomy_(Heidelberg_University)), [Heidelberg University](/source/Heidelberg_University).

- [**NStars**: 1453+1909](http://nstars.nau.edu/index.cfm?fuseaction=singleSearch.systemID&SystemID=1453p1909)[*[permanent dead link](https://en.wikipedia.org/wiki/Wikipedia:Link_rot)*]

v t e Constellation of Boötes Boötes in Chinese astronomy Boötes Void List of stars in Boötes Stars Bayer α (Arcturus) β (Nekkar) γ (Seginus) δ (Qigong) ε (Izar, Pulcherrima) ζ η (Muphrid) θ ι κ λ (Xuange) μ1 (Alkalurops) μ2 ν1 ν2 ξ ο π ρ (Kalasungsang) σ (Genghe) τ (Tepiamenit) υ φ χ ψ ω Flamsteed 1 2 3 6 (e) 7 9 10 11 12 (d) 13 14 15 18 20 22 (f) 24 (g) 26 31 32 33 34 (Alrumh) 38 (Merga) 39 40 44 (Quadrans) 45 (c) 46 (b) 47 (k) 50 Variable R S T RX ZZ AB BL BP BX BY CE CH CI CN CP CR CX CY (101 Vir) DE EK HN HP HD 118508 118889 122563 125040 125351 (A) 125658 126128 126129 126141 126200 126271 127304 127334 127726 128093 128198 129132 129357 130084 130603 130917 131040 131473 131496 (Arcalís) 132029 132406 132563 134064 134335 135438 135530 135944 141399 Other 2MASS J15031961+2525196 CFBDSIR 1458+10 Gliese 526 HAT-P-4 LHS 2924 PSR J1544+4937 SDSS J1416+1348 SDSS J1433+1011 TVLM 513-46546 WASP-14 WD 1425+540 ZTF J153932.16+502738.8 Exoplanets HAT-P-4b HD 128311 b c HD 132406 b HD 136418 b (Awasis) τ Boötis b TOI-1853 b WASP-14b Star clusters NGC 5466 Galaxies NGC 5008 5248 5251 5416 5490 5500 5504 5508 5514 5523 5529 5532 5533 5535 5539 5541 5544 5545 5548 5557 5559 5562 5579 5582 5591 5601 5603 5609 5613 5614 5615 5624 5629 5630 5641 5642 5653 5665 5676 5681 5682 5683 5698 5714 5722 5752 5753 5754 5755 5772 5778 5784 5790 5820 5821 5829 5837 5857 5875 5876 5886 5888 5896 5929 5930 5966 Numbered I II III Other 3C 295 3C 299 3C 300 3C 303 3C 315 4C 19.44 4C +26.42 7C 1354+2552 Abell 2009 BCG Arp 302 B2 1420+32 B2 1441+26 CEERS-2112 CEERS-93316 CEERS2-588 CLASS B1359+154 Cloverleaf quasar DDO 190 EGS-zs8-1 EGS-z11-R0 EGSY8p7 H1426+428 IC 4397 IC 4461 IC 4462 IC 4481 IC 4516 IRAS 13349+2438 IRAS 14394+5332 IRAS 15206+3342 LEDA 2108986 MACS 1423-z7p64 MACS J1447.4+0827 BCG Maisie's Galaxy Markarian 463 Markarian 471 Markarian 478 MS 1455.0+2232 BCG MS 1512-cB58 NVSS J141343+433945 OQ 172 OQ 530 PG 1411+442 PG 1543+489 PGC 93125 PGC 1470080 PKS 1345+125 PKS 1413+135 QSO B1422+202 RBS 1467 RGZ J145001.5+144747 RGZ J145039.8+441829 SBS 1415+437 SDSS J135646.10+102609.0 SDSS J1430+2303 Teacup galaxy UGC 8669 UGC 9128 UGC 9425 UGC 9684 UGC 9796 ULAS J1342+0928 VV 191 Galaxy clusters Abell 1795 Abell 1991 BoRG-58 IDCS J1426.5+3508 Astronomical events GRB 990123 GRB 080319B SCP 06F6 SN 2003fg SN 2005bc SN 2020tlf Category

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Adapted from the Wikipedia article [HR 5553](https://en.wikipedia.org/wiki/HR_5553) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/HR_5553?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.