HD 32188

HD 32188
	Location of HD 32188 (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Auriga
Right ascension	05h 03m 18.63675s
Declination	+41° 26′ 29.9355″
Apparent magnitude (V)	6.08
Characteristics
Spectral type	A2IIIshe
U−B color index	+0.22
B−V color index	+0.21
Variable type	Suspected
Astrometry
Radial velocity (Rv)	−0.7 km/s
Proper motion (μ)	RA: −0.44 mas/yr ; Dec.: −1.89 mas/yr
Parallax (π)	1.0886 ± 0.0733 mas
Distance	3,000 ± 200 ly ; (920 ± 60 pc)
Absolute magnitude (MV)	−2.87
Details
Radius	30.39+1.63; −0.99 R☉
Luminosity	2,428±207 L☉
Temperature	7,350+123; −189 K
Rotational velocity (v sin i)	23 km/s
Other designations
	NSV 1810, BD+41°1044, HD 32188, HIP 23511, HR 1615, SAO 39979
Database references
SIMBAD	data

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]

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b ^c ^d Guetter, H. H.; Hewitt, A. V. (June 1984), "Photoelectric UBV photometry for 317 PZT and VZT stars", Publications of the Astronomical Society of the Pacific, 96: 441–443, Bibcode:1984PASP...96..441G, doi:10.1086/131362.
^ ^a ^b ^c ^d ^e Hauck, B.; Jaschek, C. (February 2000), "A-shell stars in the Geneva system", Astronomy and Astrophysics, 354: 157–162, Bibcode:2000A&A...354..157H.
^ ^a ^b Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
^ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington DC: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
^ ^a ^b van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.Vizier catalog entry
^ ^a ^b Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393: 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943, S2CID 14070763.
^ "HD 32188". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-18.
^ Jaschek, M.; et al. (March 1988), "A survey of AE and A-type shell stars in the photographic region.", Astronomy and Astrophysics Supplement Series, 72: 505–513, Bibcode:1988A&AS...72..505J.

External links

Zdroj:https://en.wikipedia.org?pojem=HD_32188
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[GaiaDR2-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[pasp96_441-2] Guetter, H. H.; Hewitt, A. V. (June 1984), "Photoelectric UBV photometry for 317 PZT and VZT stars", Publications of the Astronomical Society of the Pacific, 96: 441–443, Bibcode:1984PASP...96..441G, doi:10.1086/131362.

[aaa354_157-3] Hauck, B.; Jaschek, C. (February 2000), "A-shell stars in the Geneva system", Astronomy and Astrophysics, 354: 157–162, Bibcode:2000A&A...354..157H.

[Samus2017-4] Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.

[gcsrv-5] Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington DC: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.

[van_Leeuwen2007-6] van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.Vizier catalog entry

[aaa393_897-7] Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393: 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943, S2CID 14070763.

[SIMBAD-8] "HD 32188". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-18.

[Jaschek1988-9] Jaschek, M.; et al. (March 1988), "A survey of AE and A-type shell stars in the photographic region.", Astronomy and Astrophysics Supplement Series, 72: 505–513, Bibcode:1988A&AS...72..505J.

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Observation data Epoch J2000 Equinox J2000
Location of HD 32188 (circled)
Constellation	Auriga
Right ascension	05^h 03^m 18.63675^s^[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 (R_v)	−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 (M_V)	−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