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]