Epsilon Volantis - Misplaced Pages

(Redirected from Epsilon Vol) Multiple star in the constellation Volans

ε Volantis
Observation data Epoch J2000.0 Equinox J2000.0
Location of ε Volantis (circled)
Constellation	Volans
Right ascension	08 07 55.7945
Declination	−68° 37′ 01.433″
Apparent magnitude (V)	+4.33
Characteristics
Spectral type	B5 III (B6 IV + B8 + A2 V + A2 V)
B−V color index	−0.12
Astrometry

Radial velocity (R_v)	+9.6 km/s
Proper motion (μ)	RA: −29.781(166) mas/yr Dec.: 29.887(177) mas/yr
Parallax (π)	5.0597 ± 0.1248 mas
Distance	640 ± 20 ly (198 ± 5 pc)
Absolute magnitude (M_V)	−1.82

Details
ε Vol Aa
Surface gravity (log g)	3.62 cgs
Temperature	14,348 K
Rotational velocity (v sin i)	1 km/s
ε Vol Ab
Surface gravity (log g)	4.07 cgs
Temperature	10,772 K
Rotational velocity (v sin i)	7 km/s
Other designations
ε Vol, CPD−68°736, HD 68520, HIP 39794, HR 3223, SAO 250128, WDS J08079–6837
Database references
SIMBAD	data

Epsilon Volantis, Latinized from ε Volantis, is a quadruple star system in the southern constellation Volans. This star is at the center of the constellation of Volans and connects the "wings" of the constellation. Based upon parallax measurements, is roughly 640 light years from Earth.

The primary component, Epsilon Volantis A, is a spectroscopic binary. It is classified a blue-white B-type giant star and has an apparent magnitude of +4.35. (The individual components are classified as B6IV and B8.) The binary system has an orbital period of 14.1683 days. The binary's companion, Epsilon Volantis B, is 6.05 arcseconds away and has an apparent magnitude of +8.1. It too is a spectroscopic binary, consisting of two A-type main sequence stars with stellar classifications of A2 V and an orbital period of "a few days".

References

^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ Cousins, A. W. J. (1977), "UCBV Magnitudes and Colours of South Circumpolar Stars", South African Astronomical Observatory Circulars, 1: 51, Bibcode:1977SAAOC...1...51C.
Houk, N.; Cowley, A. P. (1975), University of Michigan Catalogue of two-dimensional spectral types for the HD stars, vol. 1, Bibcode:1975mcts.book.....H.
^ Veramendi, M. E.; González, J. F. (July 2014), "Spectroscopic study of early-type multiple stellar systems. II. New binary subsystems", Astronomy & Astrophysics, 567: 10, arXiv:1405.1084, Bibcode:2014A&A...567A..35V, doi:10.1051/0004-6361/201423736, S2CID 21711755, A35.
Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
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.
Kovalev, Mikhail; Straumit, Ilya (2023). "Application of the binary spectral model to high-resolution spectra. First estimation of the fundamental parameters for HD 20784". Monthly Notices of the Royal Astronomical Society. 523 (3): 3741–3748. arXiv:2210.00863. Bibcode:2023MNRAS.523.3741K. doi:10.1093/mnras/stad1667.
"eps Vol". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-09-02.{{cite web}}: CS1 maint: postscript (link)
Medici, A.; Hubrig, S. (January 2000), "Triple System epsilon Vol and Quadruple System eta Mus: the Mass Ratio in Close Binary Systems", Information Bulletin on Variable Stars, 4827 (4827): 1, Bibcode:2000IBVS.4827....1M.

Constellation of Volans

Stars

Bayer	α β γ δ ε ζ η θ ι κ
Variable	R S UY
HR	2505 2531 2536 2662 2712 2888 2979 2980 3036 3038 3081 3171 3280 3346 3370 3417 3491 3495 3537 3544 3610
HD	59640 68402 74423 76700 76920
Other	L 98-59 L 97-12 WD 0806−661 WISE 0734−7157

Exoplanets	HD 68402 b HD 76700 b L 98-59 b

Galaxies

NGC	2305 2397 2442 2443 2466
Other	AM 0644-741

Galaxy clusters	SMACS J0723.3–7327