HD 34255
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Camelopardalis[1] |
| Right ascension | 05h 20m 22.61066s[2] |
| Declination | +62° 39′ 13.3608″[2] |
| Apparent magnitude (V) | 5.60±0.01[3] |
| Characteristics | |
| Spectral type | K4 I[4] |
| U−B color index | +2.00[5] |
| B−V color index | +1.75[5] |
| Astrometry | |
| Radial velocity (Rv) | −7.7±0.15[6] km/s |
| Proper motion (μ) | RA: −3.105 mas/yr[2] Dec.: −2.373 mas/yr[2] |
| Parallax (π) | 1.9726±0.0788 mas[2] |
| Distance | 1,650 ± 70 ly (510 ± 20 pc) |
| Absolute bolometric magnitude (Mbol) | −4.40±0.24[7] |
| Details | |
| Mass | 6.9±0.9[8] M☉ |
| Radius | 145[7] R☉ |
| Luminosity | 6,101[9] L☉ |
| Surface gravity (log g) | 1.14[10] cgs |
| Temperature | 3,927±170[7] K |
| Metallicity [Fe/H] | −0.01±0.05[10] dex |
| Age | 46±6[8] Myr |
| Other designations | |
| AG+62°410, BD+62°742, FK5 2397, GC 6496, HD 34255, HIP 24914, HR 1720, SAO 13460[11] | |
| Database references | |
| SIMBAD | data |
HD 34255, also known HR 1720, is a star located in the northern circumpolar constellation Camelopardalis, the giraffe. It has an apparent magnitude of 5.60,[3] allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of about 1.65 kly[2] but is approaching the Solar System with a heliocentric radial velocity of −7.7 km/s.[6]
This is a solitary,[12] evolved red supergiant with a stellar classification of K4 I.[4] It has 6.9 times the mass of the Sun and is said to be 46 million years old.[8] Despite the young age, it has already ceased hydrogen fusion at its core and now has an enlarged radius of 145 R☉.[7] HD 34255 radiates a bolometric luminosity over 6,000 times that of the Sun[9] from its photosphere at an effective temperature of 3,927 K,[7] giving it an orange glow. The star's metallicity – what astronomers dub as elements heavier than helium – is around solar level.[10]
References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Constellation record for this object at VizieR.
- ^ a b c d e Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d e Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
