HD 99922

HD 99922
Observation data
Epoch J2000      Equinox J2000
Constellation Crater[1]
HD 99922 A
Right ascension 11h 29m 38.619s[2]
Declination −24° 27′ 50.48″[2]
Apparent magnitude (V) 5.813[3]
HD 99922 B
Right ascension 11h 29m 39.219s[4]
Declination −24° 27′ 49.40″[4]
Apparent magnitude (V) 8.543[3]
Characteristics
HD 99922 A
Evolutionary stage main sequence[2][5]
Spectral type A0V[6]
B−V color index +0.07[7]
HD 99922 B
Evolutionary stage main sequence[4]
Spectral type F1V[8]
Astrometry
HD 99922 A
Radial velocity (Rv)−2.50[9] km/s
Proper motion (μ) RA: −44.450[2] mas/yr
Dec.: +15.779[2] mas/yr
Parallax (π)8.6451±0.0395 mas[2]
Distance377 ± 2 ly
(115.7 ± 0.5 pc)
HD 99922 B
Proper motion (μ) RA: −50.386[4] mas/yr
Dec.: +19.267[4] mas/yr
Parallax (π)9.2333±0.0678 mas[4]
Distance353 ± 3 ly
(108.3 ± 0.8 pc)
Details
HD 99922 A
Mass2.2[10] M☉
Radius3.2[10] R☉
Luminosity55[10] L☉
Surface gravity (log g)4.05[11] cgs
Temperature10,186[11] K
Metallicity [Fe/H]+0.25[11] dex
Rotation1.39 days[12]
Rotational velocity (v sin i)65[5] km/s
Age510[2] Myr
HD 99922 B
Mass1.3[10] M☉
Radius1.4[10] R☉
Surface gravity (log g)4.23[10] cgs
Temperature6,449[10] K
Age4.7[13] Gyr
Other designations
CD−23°10009, HD 99922, HR 4428, ADS 8183 AB[14]
HD 99922 A: HIP 56078, SAO 179935[15]
HD 99922 B: SAO 179936[16]
Database references
SIMBADAB
A
B

HD 99922 is a double star system in the constellation of Crater. It shines with an apparent visual magnitude of 5.77 from a distance of about 377 light years (116 parsecs) away from the Earth. The primary star is an A-type main sequence star; the secondary star is located about 8 arcseconds away.[16]

Other designations include HR 4428 and HIP 56078.[14]

References

  1. ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. ^ a b c d e f g 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.
  3. ^ a b Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  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 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691.
  6. ^ Houk, N.; Smith-Moore, M. (1988). "Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0". Michigan Catalogue of Two-Dimensional Spectral Types for the Hd Stars. Volume 4. 4. Bibcode:1988mcts.book.....H.
  7. ^ Nicolet, B. (1964). "Catalogue of homogeneous data in the UBV photoelectric photometric system". Astronomy and Astrophysics Supplement Series. 34: 1–49. Bibcode:1978A&AS...34....1N.
  8. ^ Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal. 81: 187. Bibcode:1935ApJ....81..187A. doi:10.1086/143628.
  9. ^ Kharchenko, N. V.; et al. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. S2CID 119323941.
  10. ^ a b c d e f g Stassun, Keivan G.; et al. (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.
  11. ^ a b c Huson, Dylan; Cowan, Indiana; Sizemore, Logan; Kounkel, Marina; Hutchinson, Brian (2025). "Gaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary Stages". The Astrophysical Journal. 984 (1): 58. arXiv:2503.02958. Bibcode:2025ApJ...984...58H. doi:10.3847/1538-4357/adc2fa.
  12. ^ Oelkers, Ryan J.; Rodriguez, Joseph E.; Stassun, Keivan G.; Pepper, Joshua; Somers, Garrett; Kafka, Stella; Stevens, Daniel J.; Beatty, Thomas G.; Siverd, Robert J.; Lund, Michael B.; Kuhn, Rudolf B.; James, David; Gaudi, B. Scott (2018). "Variability Properties of Four Million Sources in the TESS Input Catalog Observed with the Kilodegree Extremely Little Telescope Survey". The Astronomical Journal. 155 (1): 39. arXiv:1711.03608. Bibcode:2018AJ....155...39O. doi:10.3847/1538-3881/aa9bf4.
  13. ^ Kordopatis, G.; Schultheis, M.; McMillan, P. J.; Palicio, P. A.; De Laverny, P.; Recio-Blanco, A.; Creevey, O.; Álvarez, M. A.; Andrae, R.; Poggio, E.; Spitoni, E.; Contursi, G.; Zhao, H.; Oreshina-Slezak, I.; Ordenovic, C.; Bijaoui, A. (2023). "Stellar ages, masses, extinctions, and orbital parameters based on spectroscopic parameters of Gaia DR3". Astronomy and Astrophysics. 669: A104. arXiv:2206.07937. Bibcode:2023A&A...669A.104K. doi:10.1051/0004-6361/202244283.
  14. ^ a b "HD 99922". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 February 2017.
  15. ^ "HD 99922A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 February 2017.
  16. ^ a b "HD 99922B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 February 2017.
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