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Psi6 Aurigae

From Wikipedia, the free encyclopedia
Binary star in the constellation Auriga
For other stars with a similarBayer designation, seeψ Aurigae.
Psi6 Aurigae
Location of ψ6 Aurigae (circled)
Observation data
EpochJ2000.0      EquinoxJ2000.0 (ICRS)
ConstellationAuriga
Right ascension06h 47m 39.57703s[1]
Declination+48° 47′ 22.1222″[1]
Apparent magnitude (V)+5.22[2]
Characteristics
Spectral typeK0.5 III[1]
U−Bcolor index+1.04[2]
B−Vcolor index+1.11[2]
Astrometry
Radial velocity (Rv)−6.51±0.30[3] km/s
Proper motion (μ)RA: −4.32[1]mas/yr
Dec.: +7.19[1]mas/yr
Parallax (π)9.05±0.38 mas[1]
Distance360 ± 20 ly
(110 ± 5 pc)
Absolute magnitude (MV)+0.01[4]
Orbit[5]
Period (P)5,996±26 d
Eccentricity (e)0.044±0.014
Periastronepoch (T)52556 ± 310 MJD
Argument of periastron (ω)
(secondary)
222±19°
Semi-amplitude (K1)
(primary)
3.24±0.04 km/s
Details[6]
ψ6 Aur A
Mass2.02±0.28 M
Radius17.72±0.76 R
Luminosity123.4±10.2 L
Surface gravity (log g)2.25±0.07 cgs
Temperature4,574±26 K
Metallicity [Fe/H]−0.08±0.10 dex
Rotational velocity (v sin i)+10[7] km/s
Age1.55±0.67 Gyr
Other designations
ψ6 Aur,57 Aurigae,BD+48° 1436,FK5 1176,HD 48781,HIP 32562,HR 2487,SAO 41346[8]
Database references
SIMBADdata

Psi6 Aurigae,Latinized from ψ6 Aurigae, is aspectroscopic binary[5]star in the northernconstellation ofAuriga. It is a dim, naked eye star with anapparent visual magnitude of +5.22.[2] Based upon a measured annualparallax shift of9.05 ± 0.38mas,[1] it is approximately 360light-years (110parsecs) distant from the Earth.

This is a single-linedspectroscopic binary star system with anorbital period of 5,996 days (16.4 years) and aneccentricity of 0.044.[5] The visible component is aK-typegiant star with astellar classification of K0.5 III.[1] It is most likely (78% chance) on thered giant branch and is around 1.55 billion years old. As such, it has an estimated double themass of the Sun and about 18 times theSun's radius. The star is radiating about 123 times theSun's luminosity from itsphotosphere at aneffective temperature of 4,574 K.[6]

See also

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References

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  1. ^abcdefghvan 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. ^abcdArgue, A. N. (1966), "UBV photometry of 550 F, G and K type stars",Monthly Notices of the Royal Astronomical Society,133 (4):475–493,Bibcode:1966MNRAS.133..475A,doi:10.1093/mnras/133.4.475.
  3. ^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.
  4. ^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.
  5. ^abcGriffin, R. F. (February 2010), "Spectroscopic binary orbits from photoelectric radial velocities - Paper 210: Psi2 Aurigae and 34 Pegasi",The Observatory,130 (1):17–32,Bibcode:2010Obs...130...17G.
  6. ^abReffert, Sabine; et al. (2015), "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity",Astronomy & Astrophysics,574: A116,arXiv:1412.4634,Bibcode:2015A&A...574A.116R,doi:10.1051/0004-6361/201322360,hdl:10722/215277,S2CID 59334290. The values presented are for the RGB branch model.
  7. ^Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities",Contributi Osservatorio Astronomico di Padova in Asiago,239: 1,Bibcode:1970CoAsi.239....1B.
  8. ^"psi06 Aur".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved2017-09-28.

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