| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h03m 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 | |
NSV 1810, BD+41°1044, HD 32188, HIP 23511, HR 1615, SAO 39979[8] | |
| Database references | |
| SIMBAD | data |
HD 32188 is suspected variable star[4] in the northern constellationofAuriga, 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]
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]
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