UX Antliae
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 10h 57m 9.051s[1] |
| Declination | −37° 23′ 55.06″[1] |
| Apparent magnitude (V) | 11.85 - 18.0[2] |
| Characteristics | |
| Spectral type | C(F)[3] |
| Variable type | R CrB[4] |
| Astrometry | |
| Radial velocity (Rv) | 27.83[5] km/s |
| Proper motion (μ) | RA: -3.8[1] mas/yr Dec.: 2.3[1] mas/yr |
| Distance | ~25,000[3] pc |
| Absolute magnitude (MV) | ~−5[3] |
| Details | |
| Mass | 0.722[6] M☉ |
| Surface gravity (log g) | 0.5[6] cgs |
| Temperature | 7,000[6] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
UX Antliae is post-AGB star. It is an R Coronae Borealis variable star that has a base apparent magnitude of around 11.85, with irregular dimmings down to below magnitude 18.0.[7]
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.[8] It had been suspected of being one since 1940, but had been little-studied and exhibited no characteristic declines between 1975 and 1990.[3]
Assuming that its absolute magnitude is around -5, it has been estimated as lying 25000 parsecs distant from Earth.[3] Kilkenny and Westerhuys noted that its spectrum fit with that of a star of spectral class F, although was deficient in hydrogen.[8] It has around 70% the mass of the Sun and an effective (surface) temperature of around 7000 K.[6]
See also
References
- ↑ 1.0 1.1 1.2 1.3 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 3.0 3.1 3.2 3.3 3.4 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 6.0 6.1 6.2 6.3 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 8.0 8.1 Lua error in package.lua at line 80: module 'strict' not found.
External links
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