| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 07h 31m 04.48017s[2] |
| Declination | +82° 24′ 41.2905″[2] |
| Apparent magnitude (V) | 4.92[3] |
| Characteristics | |
| Evolutionary stage | AGB[4] |
| Spectral type | M4IIIa[5] |
| B−Vcolor index | +1.633±0.018[3] |
| Variable type | Lb?[6] |
| Astrometry | |
| Radial velocity (Rv) | +11.90±0.22[3] km/s |
| Proper motion (μ) | RA: −5.249[2]mas/yr Dec.: −42.174[2]mas/yr |
| Parallax (π) | 6.4908±0.2204 mas[2] |
| Distance | 500 ± 20 ly (154 ± 5 pc) |
| Absolute magnitude (MV) | −1.00[3] |
| Details | |
| Radius | 88.93+7.92 −15.25[2] R☉ |
| Luminosity | 1252±48[2] L☉ |
| Temperature | 3,641+359 −152[2] K |
| Other designations | |
| VZ Cam,BD+82°201,FK5 3951,GC 9851,HD 55966,HIP 36547,HR 2742,SAO 1179[7] | |
| Database references | |
| SIMBAD | data |
VZ Camelopardalis is a single,[8]variable star in the northerncircumpolar constellation ofCamelopardalis. It has a reddish hue and is faintly visible to thenaked eye with anapparent visual magnitude that fluctuates around 4.92.[3] The star is located at a distance of approximately 500 light years from theSun based onparallax,[2] and is drifting further away with aradial velocity of +12 km/s.[3] It was considered a member of theHyades Supercluster,[9] but in 1990 this was brought into question.[10]
This object is an agingred giant star on theasymptotic giant branch[4] with astellar classification of M4IIIa.[5] Its variable nature was discovered by American astronomerJ. Ashbrook in 1948.[11] This is a suspectedslow irregular variable of sub-type Lb that varies in visual magnitude from 4.80 down to 4.96.[6] Long-termphotometry measurements suggest there are at least seven pulsation periods ranging from 27.1 to 249.4 days.[1] With the supply of hydrogen at itscore exhausted the star has cooled and expanded until it has now reached 89 times theradius of the Sun. It is radiating 1,252 times theluminosity of the Sun from itsphotosphere at aneffective temperature of 3,641 K.[2]
