HD 32188

HD 32188
Location of HD 32188 (circled)
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]
Distance3,000 ± 200 ly
(920 ± 60 pc)
Absolute magnitude (MV)−2.87[3]
Details
Radius30.39+1.63
−0.99[1] R☉
Luminosity2,428±207[1] L☉
Temperature7,350+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
SIMBADdata

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]

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]

  1. ^ 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).
  2. ^ a b c d Cite error: The named reference pasp96_441 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference aaa354_157 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference gcsrv was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference aaa393_897 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Jaschek1988 was invoked but never defined (see the help page).