Psi3 Aurigae

Psi³ Aurigae, Latinized from ψ³ Aurigae, is a single,^[10] blue-white hued star in the northern constellation of Auriga. It is dimly visible to the naked eye with an apparent visual magnitude of +5.20.^[2] Based upon an annual parallax shift of 2.38 ± 0.39 mas as seen from the Earth,^[1] it is approximately 1,370 light-years (420 parsecs) distant from the Sun.

For other stars with this Bayer designation, see ψ Aurigae.

Psi³ Aurigae

Location of ψ3 Aurigae (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Auriga
Right ascension	06h 38m 49.18001s[1]
Declination	+39° 54′ 09.2150″[1]
Apparent magnitude (V)	+5.20[2]
Characteristics
Spectral type	B8 III[3]
U−B color index	−0.38[4]
B−V color index	−0.07[4]
Astrometry
Radial velocity (Rv)	+9.0±4.2[5] km/s
Proper motion (μ)	RA: +27.19[1] mas/yr Dec.: +16.82[1] mas/yr
Parallax (π)	6.34 ± 0.20 mas[1]
Distance	510 ± 20 ly (158 ± 5 pc)
Absolute magnitude (MV)	−2.71[6]
Details
Radius	4.2[7] R☉
Luminosity	1,624[6] L☉
Temperature	13,361±83[8] K
Rotational velocity (v sin i)	118[8] km/s
Other designations
ψ3 Aur, 52 Aur, BD+40° 1665, HD 47100, HIP 31789, HR 2420, SAO 59319[9]
Database references
SIMBAD	data

This is a B-type giant star with a stellar classification of B8 III.^[3] It has about 4.2^[7] and is spinning with a relatively high projected rotational velocity of 118 km/s.^[8] The star is radiating 1,624^[6] times the Sun's luminosity from its photosphere at an effective temperature of 13,361 K.^[8]

See also

• Psi Aurigae

References

1. 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.
2. Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
3. Cowley, A. (November 1972), "Spectral classification of the bright B8 stars", Astronomical Journal, 77: 750–755, Bibcode:1972AJ.....77..750C, doi:10.1086/111348.
4. Crawford, D. L. (February 1963), "U, b, v, and Hβ Photometry for the Bright B8- and B9-TYPE Stars", Astrophysical Journal, 137: 530, Bibcode:1963ApJ...137..530C, doi:10.1086/147526.
5. de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
6. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
7. Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
8. Paunzen, E.; et al. (2005), "An empirical temperature calibration for the Δa photometric system . I. The B-type stars", Astronomy and Astrophysics, 444 (3): 941–946, arXiv:astro-ph/0509049, Bibcode:2005A&A...444..941P, doi:10.1051/0004-6361:20053546, S2CID 119436374.
9. "tet Hyi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-10-13.
10. Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.

External links

• HR 2420
• Image Psi³ Aurigae