HD 87822

In this article we will delve into the fascinating world of HD 87822. Throughout history, HD 87822 has played a crucial role in different aspects of society, from its impact on culture and traditions to its influence on economics and politics. We will explore the different approaches and perspectives that exist around HD 87822, as well as its evolution over time. This topic offers us the opportunity to reflect and understand the importance of HD 87822 in our lives and in the world around us.

HD 87822
Observation data
Epoch J2000      Equinox J2000
Constellation Leo Minor
AB
Right ascension 10h 08m 15.88717s[1]
Declination +31° 36′ 14.5875″[1]
Apparent magnitude (V) 6.240[2] (6.90 + 7.20)[3]
C
Right ascension 10h 08m 16.16565s[4]
Declination +31° 35′ 47.1421″[4]
Apparent magnitude (V) 13.8[5]
Characteristics
AB
Spectral type F4V[6]
U−B color index +0.01[7]
B−V color index +0.445[7]
C
Spectral type dMs1.5[8]
Astrometry
AB
Radial velocity (Rv)−8.0[2] km/s
Proper motion (μ) RA: −80.47[1] mas/yr
Dec.: −92.07[1] mas/yr
Parallax (π)16.33±0.42 mas[1]
Distance200 ± 5 ly
(61 ± 2 pc)
Absolute magnitude (MV)2.23[2]
C
Radial velocity (Rv)−5.77[4] km/s
Proper motion (μ) RA: −80.484[4] mas/yr
Dec.: −87.851[4] mas/yr
Parallax (π)16.0212 ± 0.0186 mas[4]
Distance203.6 ± 0.2 ly
(62.42 ± 0.07 pc)
Orbit[9]
PrimaryA
CompanionB
Period (P)17.765±0.036 yr
Semi-major axis (a)0.1560±0.0005″
Eccentricity (e)0.3960±0.0038
Inclination (i)84.59±0.20°
Longitude of the node (Ω)349.57±0.15°
Periastron epoch (T)B 1989.133±0.042
Argument of periastron (ω)
(secondary)		7.73±0.95°
Details
A
Mass1.45[10] M☉
Surface gravity (log g)4.18[6] cgs
Temperature6,533[6] K
Metallicity 0.10[6] dex
Rotational velocity (v sin i)8[11] km/s
Age1.6[2] Gyr
B
Mass1.38[10] M☉
C
Mass0.53[10] M☉
Radius0.53[5] R☉
Luminosity0.04[5] L☉
Surface gravity (log g)4.71[5] cgs
Temperature3,610[5] K
Metallicity −0.31[12] dex
Other designations
BD+32°1982, HD 87822, HIP 49658, HR 3979, SAO 61882.
Database references
SIMBADdata

HD 87822 is a triple star in the northern constellation of Leo Minor.[10] The inner pair orbit each other with a period of about 18 years.[3]

References

  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600
  2. ^ a b c d Holmberg, J.; et al. (2007), "The Geneva-Copenhagen survey of the Solar neighbourhood. II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk", Astronomy & Astrophysics, 475 (2): 519–537, arXiv:0707.1891, Bibcode:2007A&A...475..519H, doi:10.1051/0004-6361:20077221, S2CID 119054949
  3. ^ a b Malkov, O. Yu.; et al. (2012), "Dynamical Masses of a Selected Sample of Orbital Binaries", Astronomy & Astrophysics, 546: 5, Bibcode:2012A&A...546A..69M, doi:10.1051/0004-6361/201219774, A69
  4. ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  5. ^ a b c d e Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256.
  6. ^ a b c d Cenarro, A. J.; et al. (January 2007), "Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters", Monthly Notices of the Royal Astronomical Society, 374 (2): 664–690, arXiv:astro-ph/0611618, Bibcode:2007MNRAS.374..664C, doi:10.1111/j.1365-2966.2006.11196.x, S2CID 119428437
  7. ^ a b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
  8. ^ Zhong, Jing; Li, Jing; Carlin, Jeffrey L.; Chen, Li; Mendez, Rene A.; Hou, Jinliang (2019). "Value-added Catalogs of M-type Stars in LAMOST DR5". The Astrophysical Journal Supplement Series. 244 (1): 8. arXiv:1908.01128. Bibcode:2019ApJS..244....8Z. doi:10.3847/1538-4365/ab3859. S2CID 199442518.
  9. ^ Hartkopf, William I.; Mason, Brian D.; McAlister, Harold A. (1996). "Binary Star Orbits From Speckle Interferometry. VIII. Orbits of 37 Close Visual System". Astronomical Journal. 111: 370. Bibcode:1996AJ....111..370H. doi:10.1086/117790.
  10. ^ a b c d Tokovinin, Andrei (2018-03-01). "The Updated Multiple Star Catalog". The Astrophysical Journal Supplement Series. 235 (1): 6. arXiv:1712.04750. Bibcode:2018ApJS..235....6T. doi:10.3847/1538-4365/aaa1a5. ISSN 0067-0049. S2CID 119047709.
  11. ^ Uesugi, Akira; Fukuda, Ichiro (1970). "Catalogue of rotational velocities of the stars". Contributions from the Institute of Astrophysics and Kwasan Observatory. University of Kyoto. Bibcode:1970crvs.book.....U.
  12. ^ Ding, Ming-Yi; Shi, Jian-Rong; Wu, Yue; Jones, Hugh R. A.; Yan, Hong-Liang; Li, Chun-Qian; Gao, Qi; Chen, Tian-Yi; Zhang, Jing-Hua; Liu, Shuai; Yan, Tai-Sheng; Xie, Xiao-Jin (2022). "Stellar Atmospheric Parameters of M-type Stars from LAMOST DR8". The Astrophysical Journal Supplement Series. 260 (2): 45. arXiv:2204.09200. Bibcode:2022ApJS..260...45D. doi:10.3847/1538-4365/ac6754. S2CID 248266451.


Stub icon

This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it.