HD 99922

HD 99922
Observation data
Epoch J2000      Equinox J2000
Constellation Crater
HD 99922 A
Right ascension 11h 29m 38.612s[1]
Declination −24° 27′ 50.52″[1]
Apparent magnitude (V) 5.813[1]
HD 99922 B
Right ascension 11h 29m 39.209s[1]
Declination −24° 27′ 49.24″[1]
Apparent magnitude (V) 8.543[1]
Characteristics
HD 99922 A
Spectral type A0V[2]
B−V color index +0.07[3]
Astrometry
HD 99922 A
Radial velocity (Rv)-2.50[4] km/s
Proper motion (μ) RA: -56.4[1] mas/yr
Dec.: 9.7[1] mas/yr
Parallax (π)7.32 ± 0.61 mas[5]
Distance450 ± 40 ly
(140 ± 10 pc)
HD 99922 B
Proper motion (μ) RA: -49.7[1] mas/yr
Dec.: 19.4[1] mas/yr
Other designations
ADS 8183 AB, CD–23° 10009, HD 99922, HIP 56078, HR 4428[2]
HD 99922 A: SAO 179935[6]
HD 99922 B: SAO 179936[7]
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 450 light years (140 parsecs) away from the Earth. The primary star is an A-type main sequence star; the secondary star is located about 8 arcseconds away.[7]

Other designations include HR 4428 and HIP 56078.[2]

  1. ^ a b c d e f g h i j 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.
  2. ^ a b c "HD 99922". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 February 2017.
  3. ^ 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.
  4. ^ 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.
  5. ^ 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.
  6. ^ "HD 99922A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 February 2017.
  7. ^ a b "HD 99922B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 February 2017.