49 Camelopardalis
File:49CamLightCurve.png A visual band light curve for 49 Camelopardalis, adapted from Adelman and Kaewkornmaung, (2005)[1]> | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 07h 46m 27.41459s[2] |
| Declination | +62° 49′ 49.8895″[2] |
| Apparent magnitude (V) | 6.50[3] (6.43–6.48)[4] |
| Characteristics | |
| Spectral type | A7VpSrCrEuSiKsn[5] |
| B−V color index | 0.262±0.002[3] |
| Variable type | α2 CVn[4] |
| Astrometry | |
| Radial velocity (Rv) | 6.5±0.5[3] km/s |
| Proper motion (μ) | RA: −36.63[6] mas/yr Dec.: −61.36[6] mas/yr |
| Parallax (π) | 10.4369±0.0566 mas[2] |
| Distance | 313 ± 2 ly (95.8 ± 0.5 pc) |
| Absolute magnitude (MV) | 1.58[3] |
| Details[7] | |
| Mass | 1.92+0.14 −0.25 M☉ |
| Radius | 2.32±0.33 R☉ |
| Luminosity | 17.4+3.5 −2.9 L☉ |
| Surface gravity (log g) | 3.99±0.13 cgs |
| Temperature | 7,740±460 K |
| Metallicity [Fe/H] | −3.40±0.16 dex |
| Rotation | 4.28677±0.00003 d[8] |
| Rotational velocity (v sin i) | 25.8±1.0 km/s |
| Age | 891+489 −316 Myr |
| Other designations | |
| 49 Cam, BC Cam, BD+63°733, GC 10422, HD 62140, HIP 37934, HR 2977, SAO 14322[9] | |
| Database references | |
| SIMBAD | data |
49 Camelopardalis is a variable star in the northern circumpolar constellation of Camelopardalis,[9] located 313 light years from the Sun based on parallax measurements.[2] It has the variable star designation BC Camelopardalis; 49 Camelopardalis is the Flamsteed designation. This star is a challenge to view with the naked eye, having a baseline apparent visual magnitude of 6.50.[3] It is moving away from the Earth with a heliocentric radial velocity of +6.5 km/s.[3]
This is a magnetic chemically peculiar star[7] with a stellar classification of A7VpSrCrEuSiKsn,[5] indicating it is an A-type main-sequence star with overabundances of various elements including strontium and europium, as well as broad, "nebulous" lines. The magnetic field of 49 Camelopardalis shows a relatively complex structure, in combination with distinct abundance patterns across the surface.[10]
Walter K. Bonsack et al. discovered that 49 Camelopardalis is a variable star, in 1974.[11] It is classified as an Alpha2 Canum Venaticorum type variable and its brightness varies from visual magnitude +6.43 down to +6.48 with a rotationally-modulated period of 4.29 days.[4]
49 Camelopardalis has 1.9 times the mass of the Sun and 2.3 times the Sun's radius. It is around 891 million years old[7] and is spinning with a period of 4.29 days.[8] The star is radiating 17 times the luminosity of the Sun from its photosphere at an effective temperature of 7,740 K.[7]
References
[edit | edit source]- ^ Adelman & Kaewkornmaung 2005.
- ^ a b c d 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 e f Anderson & Francis 2012.
- ^ a b c Samus et al. 2017.
- ^ a b Abt & Morrell 1995.
- ^ a b van Leeuwen 2007.
- ^ a b c d Sikora et al. 2019a.
- ^ a b Sikora et al. 2019b.
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Silvester et al. 2017.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
Sources
[edit | edit source]- 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).
