52 Hydrae

52 Hydrae
Observation data; Equinox J2000.0]] (ICRS)
Constellation	Hydra
Right ascension	14h 28m 10.42638s
Declination	−29° 29′ 29.8884″
Apparent magnitude (V)	4.97 (5.70 + 5.70 + 10.00)
Characteristics
Evolutionary stage	main sequence
Spectral type	B7/8V
B−V color index	−0.074±0.003
Astrometry
Radial velocity (Rv)	5.4±3.8 km/s
Proper motion (μ)	RA: −25.23 mas/yr ; Dec.: −23.03 mas/yr
Parallax (π)	8.29 ± 0.28 mas
Distance	390 ± 10 ly ; (121 ± 4 pc)
Absolute magnitude (MV)	−0.43
Details
52 Hya A
Mass	3.82±0.06 M☉
Luminosity	310.5+24.5; −22.8 L☉
Temperature	12,853±89 K
Rotational velocity (v sin i)	204 km/s
Other designations
	l Hya, 52 Hya, CD−28°10712, FK5 532, HD 126769, HIP 70753, HR 5407, SAO 182570, ADS 9270, WDS J14282-2929
Database references
SIMBAD	data

Short description: Star in the constellation Hydra

52 Hydrae is a triple star system^[7] in the constellation Hydra. It has the Bayer designation l Hydrae; 52 Hydrae is the Flamsteed designation.^[6] This system is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 4.97.^[2] It is a probable (80% chance) member of the Sco OB2 moving group of stars,^[8] and is moving away from the Earth with a heliocentric radial velocity of 5 km/s.^[2]

The primary component is a binary system^[7] consisting of two nearly equal components with an orbital period of around 15 years^[9] and an angular separation of 0.1″.^[7] It shows a combined stellar classification of B7/8V,^[5] which matches a B-type main-sequence star. The third component is a magnitude 10.0 star at a separation of 4.2″^[7] with a mass similar to the Sun. It is orbiting the inner pair with a period of around 3,900 years.^[9]

References

↑ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
↑ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
↑ Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22.
↑ ^4.0 ^4.1 ^4.2 ^4.3 ^4.4 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
↑ ^5.0 ^5.1 Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode: 1982mcts.book.....H.
↑ ^6.0 ^6.1 "l Hya". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=l+Hya.
↑ ^7.0 ^7.1 ^7.2 ^7.3 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
↑ Rizzuto, Aaron et al. (October 2011), "Multidimensional Bayesian membership analysis of the Sco OB2 moving group", Monthly Notices of the Royal Astronomical Society 416 (4): 3108–3117, doi:10.1111/j.1365-2966.2011.19256.x, Bibcode: 2011MNRAS.416.3108R.
↑ ^9.0 ^9.1 Tokovinin, A. (September 2008), "Comparative statistics and origin of triple and quadruple stars", Monthly Notices of the Royal Astronomical Society 389 (2): 925–938, doi:10.1111/j.1365-2966.2008.13613.x, Bibcode: 2008MNRAS.389..925T.

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/52 Hydrae. Read more

[vanLeeuwen2007-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.

[Anderson2012-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.

[WDSC2014-3] Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22.

[zorec2012-4] 4.0 ^4.1 ^4.2 ^4.3 ^4.4 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.

[houk1979-5] 5.0 ^5.1 Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode: 1982mcts.book.....H.

[SIMBAD-6] 6.0 ^6.1 "l Hya". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=l+Hya.

[Eggleton2008-7] 7.0 ^7.1 ^7.2 ^7.3 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.

[Rizzuto2011-8] Rizzuto, Aaron et al. (October 2011), "Multidimensional Bayesian membership analysis of the Sco OB2 moving group", Monthly Notices of the Royal Astronomical Society 416 (4): 3108–3117, doi:10.1111/j.1365-2966.2011.19256.x, Bibcode: 2011MNRAS.416.3108R.

[Tokovinin2008-9] 9.0 ^9.1 Tokovinin, A. (September 2008), "Comparative statistics and origin of triple and quadruple stars", Monthly Notices of the Royal Astronomical Society 389 (2): 925–938, doi:10.1111/j.1365-2966.2008.13613.x, Bibcode: 2008MNRAS.389..925T.

Observation data Equinox J2000.0]] (ICRS)
Constellation	Hydra
Right ascension	14^h 28^m 10.42638^s^[1]
Declination	−29° 29′ 29.8884″^[1]
Apparent magnitude (V)	4.97^[2] (5.70 + 5.70 + 10.00)^[3]
Characteristics
Evolutionary stage	main sequence^[4]
Spectral type	B7/8V^[5]
B−V color index	−0.074±0.003^[2]
Astrometry

Radial velocity (R_v)	5.4±3.8^[2] km/s
Proper motion (μ)	RA: −25.23^[1] mas/yr Dec.: −23.03^[1] mas/yr
Parallax (π)	8.29 ± 0.28^[1] mas
Distance	390 ± 10 ly (121 ± 4 pc)
Absolute magnitude (M_V)	−0.43^[2]

Details
52 Hya A
Mass	3.82±0.06^[4] `M`_☉
Luminosity	310.5+24.5 −22.8^[4] `L`_☉
Temperature	12,853±89^[4] K
Rotational velocity (v sin i)	204^[4] km/s

Other designations
l Hya, 52 Hya, CD−28°10712, FK5 532, HD 126769, HIP 70753, HR 5407, SAO 182570, ADS 9270, WDS J14282-2929^[6]
Database references
SIMBAD	data