HD 180450
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra
|
| Right ascension | 19h 15m 24.85937s[1] |
| Declination | +30° 31′ 34.9760″[1] |
| Apparent magnitude (V) | 5.88[2] |
| Characteristics | |
| Spectral type | M1IIIab[2] |
| U−B color index | +2.03 |
| B−V color index | +1.665±0.007[2] |
| Absolute magnitude (MV) | −2.03[2] |
| Details | |
| Radius | 68+12 −13[1] R☉ |
| Luminosity | 1,002±34[1] L☉ |
| Temperature | 3,947+433 −305[1] K |
| Database references | |
| SIMBAD | data |
HD 180450 is a singlelight years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −64.4 km/s.[1]
This is an aging red giant star with a stellar classification of M1IIIab,[2] It is currently on the asymptotic giant branch,[6] having exhausted the supply of hydrogen in its core and evolved of the main sequence. It has expanded to ~68 times the radius of the Sun and is radiating a thousand times the Sun' luminosity from its enlarged photosphere at en effective temperature of 3,947 K.[1]
References
- ^ .
- ^ S2CID 119257644.
- ^ "HD 180450". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-10-14.
- S2CID 14878976.
- ISBN 0-933346-84-0.
- doi:10.1086/116239.