| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 22m 58.14606s[1] |
| Declination | −66° 54′ 05.3903″[1] |
| Apparent magnitude (V) | 4.97[2] |
| Characteristics | |
| Spectral type | B8V[3] |
| B−V color index | −0.128±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | +12.0±4.2[2] km/s |
| Proper motion (μ) | RA: −22.39[1] mas/yr Dec.: +11.48[1] mas/yr |
| Parallax (π) | 8.12 ± 0.18 mas[1] |
| Distance | 402 ± 9 ly (123 ± 3 pc) |
| Absolute magnitude (MV) | −0.403[4] |
| Orbit[4] | |
| Period (P) | 15.727±0.001 d |
| Semi-major axis (a) | 52.66 R☉ |
| Eccentricity (e) | 0.044±0.014 |
| Inclination (i) | 54° |
| Periastron epoch (T) | 2,452,814.78±1.05 JD |
| Argument of periastron (ω) (secondary) | 138±25° |
| Semi-amplitude (K1) (primary) | 62.2±1.9 km/s |
| Semi-amplitude (K2) (secondary) | 76.0±1.5 km/s |
| Details | |
| A | |
| Mass | 4.3[4] M☉ |
| Luminosity | 288.39[2] L☉ |
| Rotational velocity (v sin i) | 7[4] km/s |
| Age | 18[4] Myr |
| B | |
| Mass | 3.5[4] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 90264 is a binary star[4] system in the southern constellation of Carina. It has the Bayer designation of L Carinae, while HD 90264 is the star's identifier in the Henry Draper catalogue. This system has a blue-white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.97.[2] It is located at a distance of approximately 402 light years from the Sun based on parallax, and is drifting further away with a radial velocity of around +12 km/s.[2] The system is a member of the Lower Centaurus Crux association of the Sco-Cen Complex.[4]
This system was found to be a close double-lined spectroscopic binary in 1977, consisting of two B-type main-sequence stars. It has a near circular orbit with a period of 15.727 days and a semimajor axis of 0.2449 AU. They appear to be spin-orbit synchronized. Both stars appear to be deficient in helium. The primary is a helium variable star while the companion is a mercury-manganese star. The variability of both stars aligns favorably with the orbital period.[4]
vanLeeuwen2007 was invoked but never defined (see the help page).Anderson2012 was invoked but never defined (see the help page).houk1979 was invoked but never defined (see the help page).Quiroga2010 was invoked but never defined (see the help page).SIMBAD was invoked but never defined (see the help page).