HD 68375
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Camelopardalis[1] |
| Right ascension | 08h 19m 32.2891s[2] |
| Declination | +75° 45′ 24.866″[2] |
| Apparent magnitude (V) | 5.54±0.01[3] |
| Characteristics | |
| Evolutionary stage | Horizontal branch[4] |
| Spectral type | G8 III[5] |
| B−V color index | +0.9[6] |
| Astrometry | |
| Radial velocity (Rv) | 4.33±0.16[7] km/s |
| Proper motion (μ) | RA: +32.404 mas/yr[2] Dec.: +15.893 mas/yr[2] |
| Parallax (π) | 11.2853±0.0516 mas[2] |
| Distance | 289 ± 1 ly (88.6 ± 0.4 pc) |
| Absolute magnitude (MV) | +0.88[1] |
| Details | |
| Mass | 1.91[8] M☉ |
| Radius | 8.99[9] R☉ |
| Luminosity | 49.4±0.5[10] L☉ |
| Surface gravity (log g) | 2.77[11] cgs |
| Temperature | 5,078±5[9] K |
| Metallicity [Fe/H] | −0.12±0.01[12] dex |
| Rotational velocity (v sin i) | 1.3±1.4[13] km/s |
| Age | 1.31[12] Gyr |
| Other designations | |
| AG+75°385, BD+76°310, FK5 310, GC 11246, HD 68375, HIP 40793, HR 3216, SAO 6487[14] | |
| Database references | |
| SIMBAD | data |
HD 68375 (HR 3216) is a solitary[15] star in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye with an apparent magnitude of 5.54[3] and is estimated to be 289 light years distant.[2] However, it is receding with a heliocentric radial velocity of 4.33 km/s.[7]
HD 68375 has a stellar classification of G8 III,[5] indicating that it is a red giant. It is currently on the horizontal branch, generating energy via fusion inside a helium core. Specifically, it is a red clump star, at the cool end of the horizontal branch where stars with near-solar metallicity are found.[4] After approximately 1 billion years,[12] the star now has a radius of 9 R☉ and an effective temperature of 5,078 K,[9] giving a yellow hue. Nevertheless, it has nearly double the mass of the Sun[8] and radiates at 49 times the luminosity of the Sun[10] from its enlarged photosphere. HD 68375 is slightly metal deficient with a metallicity 76% that of the Sun[12] and spins with a poorly constrained projected rotational velocity of 1.3 km/s.[13]
References
[edit | edit source]- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). XHIP 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). (Erratum: Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).). Gaia EDR3 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).
- ^ 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 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). Gaia DR2 record for this source at VizieR.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d 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).
- ^ 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).
