HD 32188 is suspected variable star[4] in the northern constellation of Auriga, and is positioned roughly in between Eta and Zeta Aurigae. It has a white hue and is just barely visible to the naked eye with an apparent visual magnitude that fluctuates around 6.08.[2] The distance to this star is approximately 3,000 light years, based on parallax.[1] It has an absolute magnitude of −2.87.[3]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Auriga |
Right ascension | 05h 03m 18.63675s[1] |
Declination | +41° 26′ 29.9355″[1] |
Apparent magnitude (V) | 6.08[2] |
Characteristics | |
Spectral type | A2IIIshe[3] |
U−B color index | +0.22[2] |
B−V color index | +0.21[2] |
Variable type | Suspected[4] |
Astrometry | |
Radial velocity (Rv) | −0.7[5] km/s |
Proper motion (μ) | RA: −0.44[6] mas/yr Dec.: −1.89[6] mas/yr |
Parallax (π) | 1.0886 ± 0.0733 mas[1] |
Distance | 3,000 ± 200 ly (920 ± 60 pc) |
Absolute magnitude (MV) | −2.87[3] |
Details | |
Radius | 30.39+1.63 −0.99[1] R☉ |
Luminosity | 2,428±207[1] L☉ |
Temperature | 7,350+123 −189[1] K |
Rotational velocity (v sin i) | 23[7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
This object is an A-type giant star with a stellar classification of A2IIIshe.[3] The suffix notation indicates this is a shell star,[9] which means it has a peculiar spectrum indicating there is a circumstellar disk of gas around the star's equator. While the spectral luminosity class is III, analysis of its colour and brightness suggest it more closely resembles a supergiant star.[3] HD 32188 has expanded to 30[1] times the radius of the Sun and it is spinning with a projected rotational velocity of 23 km/s.[7] It is radiating 2,428[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 7,350 K.[1]