HD 158220
Star in the constellation Ara
From Wikipedia, the free encyclopedia
HD 158220 is a giant Be star in the southern constellation of Ara. Its apparent magnitude is 5.9, making it faintly visible to the naked eye under good observing conditions. This is a pulsating variable star that changes brightness by an amplitude of 0.030 magnitude over a period of 1.15 days.[5]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 31m 23.28387s[2] |
| Declination | −56° 55′ 15.4672″[2] |
| Apparent magnitude (V) | 5.95[3] |
| Characteristics | |
| Spectral type | B7II-III[4] |
| B−V color index | −0.08[3] |
| Variable type | Be star[5] |
| Astrometry | |
| Radial velocity (Rv) | −3[6] km/s |
| Proper motion (μ) | RA: −0.29[2] mas/yr Dec.: −3.72[2] mas/yr |
| Parallax (π) | 1.78±0.34 mas[2] |
| Distance | approx. 1,800 ly (approx. 600 pc) |
| Details | |
| Luminosity | 1,176[7] L☉ |
| Temperature | 9,657[7] K |
| Other designations | |
| V862 Arae, CD−56°6893, HD 158220, HIP 85751, HR 6505, SAO 244808. | |
| Database references | |
| SIMBAD | data |
The Hipparcos data revealed that HD 158220 is a variable star. It was given its variable star designation, V862 Arae, in 1999.[8]
