HD 37519
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | 05h 40m 35.90737s[2] |
| Declination | +31° 21′ 29.5262″[2] |
| Apparent magnitude (V) | 6.04[3] |
| Characteristics | |
| Spectral type | B9.5III-IV(p)? (Hg?)[4] |
| U−B color index | −0.21[3] |
| B−V color index | +0.05[3] |
| Variable type | suspected[5] |
| Astrometry | |
| Radial velocity (Rv) | −10.2±3.4[6] km/s |
| Proper motion (μ) | RA: −5.051[2] mas/yr Dec.: −8.187[2] mas/yr |
| Parallax (π) | 4.0335±0.1112 mas[2] |
| Distance | 810 ± 20 ly (248 ± 7 pc) |
| Absolute magnitude (MV) | −0.43[7] |
| Details | |
| Mass | 2.8[8] M☉ |
| Radius | 6.2[9] R☉ |
| Luminosity | 221[9] L☉ |
| Surface gravity (log g) | 3.88[8] cgs |
| Temperature | 10,677[8] K |
| Rotational velocity (v sin i) | 195[10] km/s |
| Age | 375[7] Myr |
| Other designations | |
| NSV 2537, BD+31°1048, FK5 2425, HD 37519, HIP 26712, HR 1938, SAO 58319[11] | |
| Database references | |
| SIMBAD | data |
HD 37519 is a star in the northern constellation Auriga. It has a blue-white hue and is dimly visible to the naked eye with an apparent visual magnitude of 6.04.[3] The distance to HD 37519 is approximately 810 light years based on parallax, but it is drifting closer with a radial velocity of −10 km/s.[6]
Cowley in 1972 found a stellar classification of B9.5III-IV(p)? (Hg?) for this star,[4] suggesting it is an evolved B-type star and a suspected chemically peculiar star of the mercury-manganese type.[12] It is estimated to be 375 million years old and with a high rate of spin, showing a projected rotational velocity of 195 km/s.[10] In March 1964, a suspected flare of HD 37519 was detected that increased the star's brightness by about three magnitudes. Smaller variations of up to two magnitudes were detected a few days later,[13] suggesting there might be a flare star companion. However, follow-up observations failed to confirm the variability.[14] The star is radiating 221 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 10,677 K.[8]>
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 DR2 record for this source at VizieR.
- ^ 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).
- ^ 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 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).
- ^ 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).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
