VZ Camelopardalis

VZ Camelopardalis

A visual band light curve for VZ Camelopardalis, plotted from data presented by Tabur et al. (2009)[1]
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−V color 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]
Distance500 ± 20 ly
(154 ± 5 pc)
Absolute magnitude (MV)−1.00[3]
Details
Radius88.93+7.92
−15.25[2] R☉
Luminosity1252±48[2] L☉
Temperature3,641+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
SIMBADdata

VZ Camelopardalis is a single,[8] variable star in the northern circumpolar constellation of Camelopardalis. It has a reddish hue and is faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 4.92.[3] The star is located at a distance of approximately 500 light years from the Sun based on parallax,[2] and is drifting further away with a radial velocity of +12 km/s.[3] It was considered a member of the Hyades Supercluster,[9] but in 1990 this was brought into question.[10]

This object is an aging red giant star on the asymptotic giant branch[4] with a stellar classification of M4IIIa.[5] Its variable nature was discovered by American astronomer J. Ashbrook in 1948.[11] This is a suspected slow irregular variable of sub-type Lb that varies in visual magnitude from 4.80 down to 4.96.[6] Long-term photometry measurements suggest there are at least seven pulsation periods ranging from 27.1 to 249.4 days.[1] With the supply of hydrogen at its core exhausted the star has cooled and expanded until it has now reached 89 times the radius of the Sun. It is radiating 1,252 times the luminosity of the Sun from its photosphere at an effective temperature of 3,641 K.[2]

  1. ^ a b Cite error: The named reference Tabur2009 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i j Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Eggen1992 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Yamashita1967 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggen1985 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Yamakawa1990 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggen1991 was invoked but never defined (see the help page).