HD 40873
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | 06h 04m 29.11992s[2] |
| Declination | +51° 34′ 24.1921″[2] |
| Apparent magnitude (V) | 6.45[3] |
| Characteristics | |
| Spectral type | A7 V[4] or A7 III[5] |
| U−B color index | +0.16[3] |
| B−V color index | +0.196±0.007[1] |
| Astrometry | |
| Radial velocity (Rv) | 19.6±2.9[1] km/s |
| Proper motion (μ) | RA: +1.850[2] mas/yr Dec.: −41.692[2] mas/yr |
| Parallax (π) | 7.1678±0.0962 mas[2] |
| Distance | 455 ± 6 ly (140 ± 2 pc) |
| Absolute magnitude (MV) | 0.76[1] |
| Details | |
| Luminosity | 38[6] L☉ |
| Temperature | 7,753[6] K |
| Rotational velocity (v sin i) | 134[7] km/s |
| Other designations | |
| 35 Camelopardalis, NSV 2804, BD+51°1146, FK5 2463, HD 40873, HIP 28765, HR 2123, SAO 25548 | |
| Database references | |
| SIMBAD | data |
HD 40873 is a star in the northern constellation of Auriga, a few degrees to the south of Delta Aurigae. Located around 455 light-years distant,[2] it shines with a luminosity approximately 38 times that of the Sun and has an effective temperature of 7,753 K.[6] It is a suspected variable star[3] and has a fairly rapid rotation rate, showing a projected rotational velocity of 134 km/s.[7] Eggen (1985) suggested it is a probable member of the Hyades Supercluster.[8]
Samuel Molyneux named this star Telescopica in Auriga.[9] Flamsteed catalogued it as 35 Camelopardalis Heveliana, which is the name James Bradley continued to use, although it is within the borders of the modern constellation Auriga.[10] Francis Baily reclassified it to Auriga as star 1924 in the British Association's 1845 Catalogue of 8377 Stars.[11]
HD 40873 is considered to be an Am star, a chemically peculiar star with unusually strong absorption lines of metals.[12] It has been given a spectral type of kA5mA7IV,[13] although other catalogues have given more normal classifications such as A7 V or A7 III.[4][5]
Components
[edit | edit source]HD 40873 has a 9th magnitude class A5 companion about half an arc-minute away. It is designated as SAO 25549.[14] The companion is itself a pair of stars, each of similar brightness, separated by 0.6".[15]
References
[edit | edit source]- ^ a b c d 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 f 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 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).
- ^ 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).
- ^ 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).
