| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 10h57m 9.051s[2] |
| Declination | −37° 23′ 55.06″[2] |
| Apparent magnitude (V) | 11.85 - 18.0[3] |
| Characteristics | |
| Spectral type | C(F)[4] |
| Variable type | R CrB[5] |
| Astrometry | |
| Radial velocity (Rv) | 27.83[6] km/s |
| Proper motion (μ) | RA: -3.8[2] mas/yr Dec.: 2.3[2] mas/yr |
| Distance | ~25,000[4] pc |
| Absolute magnitude (MV) | ~−5[4] |
| Details | |
| Mass | 0.722[7] M☉ |
| Surface gravity (log g) | 0.5[7] cgs |
| Temperature | 7,000[7] K |
| Other designations | |
2MASS J10570905-3723550, TYC 7212-77-1, HV 10108, DENIS-P J105709.0-372354, GSC 07212-00077, GSC2 S1303203939, AAVSO 1052-36 | |
| Database references | |
| SIMBAD | data |
UX Antliae is a post-AGB and R Coronae Borealis variable star that has a base apparent magnitude of around 11.85, with irregular dimmings down to below magnitude 18.0.[8]
Researchers David Kilkenny and J.E. Westerhuys of the South African Astronomical Observatory confirmed that UX Antliae was an R Coronae Borealis variable in 1990 after noting the similarity of its spectrum to the RCB star W Mensae.[9] It had been suspected of being one since 1940, but had been little-studied and exhibited no characteristic declines between 1975 and 1990.[4]
Assuming that its absolute magnitude is around -5, it has been estimated as lying 25000 parsecs distant from Earth.[4] Kilkenny and Westerhuys noted that its spectrum fit with that of a star of spectral class F, although was deficient in hydrogen.[9] It has around 70% the mass of the Sun and an effective (surface) temperature of around 7000 K.[7]
"Post-AGB Object 279.064 +20.120". www.ncac.torun.pl.
"Light Curve of UX Ant". www.kusastro.kyoto-u.ac.jp.
