HD 99922
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Crater |
| HD 99922 A | |
| Right ascension | 11h29m38.612s[1] |
| Declination | −24° 27′ 50.52″[1] |
| Apparent magnitude(V) | 5.813[1] |
| HD 99922 B | |
| Right ascension | 11h29m39.209s[1] |
| Declination | −24° 27′ 49.24″[1] |
| Apparent magnitude(V) | 8.543[1] |
| Characteristics | |
| HD 99922 A | |
| Spectral type | A0V[2] |
| B−Vcolor 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 ± 0.61mas[5] |
| Distance | 450 ± 40ly (140 ± 10pc) |
| HD 99922 B | |
| Proper motion(μ) | RA:-49.7[1]mas/yr Dec.:19.4[1]mas/yr |
| Other designations | |
| HD 99922 A:SAO179935[6] | |
| HD 99922 B:SAO179936[7] | |
| Database references | |
| SIMBAD | AB |
| A | |
| B | |
HD 99922is adouble starsystem in the constellation ofCrater.It shines with anapparent visual magnitudeof 5.77 from a distance of about 450light years(140parsecs) away from theEarth.The primary star is anA-typemain sequencestar; the secondary star is located about 8 arcseconds away.[7]
Other designations includeHR 4428andHIP 56078.[2]
References
[edit]- ^abcdefghijHøg, 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.
- ^abc"HD 99922".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved20 February2017.
- ^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.
- ^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.S2CID119323941.
- ^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.S2CID18759600.
- ^"HD 99922A".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved20 February2017.
- ^ab"HD 99922B".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved20 February2017.
