astro.wikisort.org - Star12 Lyncis, abbreviated 12 Lyn, is a triple star[8] system in the constellation Lynx. It is visible to the naked eye as a faint point of light with a combined apparent visual magnitude of 4.87. When seen through a telescope, it can be separated into three stars: two components with magnitudes 5.4 and 6.0 that lie at an angular separation by 1.8″ (as of 1992) and a yellow-hued star of magnitude 7.2 at a separation of 8.6″ (as of 1990).[9][10] The orbit of the two brighter stars is not known with certainty, but appears to have a period of somewhere around 700 to 900 years.[11] The pair have a projected separation of 128 AU.[4] Parallax indicates the system is 210±10 light years distant from Earth.[1]
Star in the constellation Lynx
12 Lyn
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Lynx |
Right ascension |
06h 46m 14.13019s[1] |
Declination |
+59° 26′ 30.0227″[1] |
Apparent magnitude (V) |
4.86[2] (5.44 / 6.00)[3] |
Characteristics |
Spectral type |
A3V[2] (A1.5V + A2V)[4] |
U−B color index |
+0.08[5] |
B−V color index |
+0.084±0.012[2] |
Astrometry |
---|
|
---|
Radial velocity (Rv) | −3.0±4.2[6] km/s |
Proper motion (μ) | RA: −19.63[1] mas/yr Dec.: −7.23[1] mas/yr |
Parallax (π) | 15.19 ± 0.78 mas[1] |
Distance | 210 ± 10 ly (66 ± 3 pc) |
Absolute magnitude (MV) | 0.77[2] |
|
Orbit[3] |
---|
Period (P) | 907.6 yr |
Semi-major axis (a) | 2.30″ |
Eccentricity (e) | 0.3700 |
Inclination (i) | 134.7° |
Longitude of the node (Ω) | 166.5° |
Periastron epoch (T) | B 2677.4 |
Argument of periastron (ω) (secondary) | 322.6° |
Details |
---|
12 Lyn A |
---|
Radius | 2.52[4] R☉ |
Rotational velocity (v sin i) | 90±30[4] km/s |
12 Lyn B |
---|
Radius | 2.44[4] R☉ |
Rotational velocity (v sin i) | 100±30[4] km/s |
Other designations |
---|
|
Database references |
---|
SIMBAD | 12 Lyn |
| 12 Lyn A |
| 12 Lyn B |
References
- van Leeuwen, F.; et al. (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. Archived from the original on 2016-04-02.
- 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.
- "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Retrieved 28 May 2017.
- Howe, K. S.; Clarke, C. J. (January 2009). "An analysis of v sin (i) correlations in early-type binaries". Monthly Notices of the Royal Astronomical Society. 392 (1): 448–454. Bibcode:2009MNRAS.392..448H. doi:10.1111/j.1365-2966.2008.14073.x.
- Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
- Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
- "* 12 Lyn". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 November 2012.
- 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.
- Mason, Brian D.; et al. (2001), "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920.
- Monks, Neale (2010). Go-To Telescopes Under Suburban Skies. New York, New York: Springer Science & Business Media. p. 56. ISBN 9781441968517.
- Malkov, O. Yu.; Tamazian, V.S.; Docobo, J.A.; Chulkov, D.A. (2012). "Dynamical Masses of a Selected Sample of Orbital Binaries". Astronomy and Astrophysics. 546: 5. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774. A69.
На других языках
- [en] 12 Lyncis
[ru] 12 Рыси
12 Рыси (лат. 12 Lyncis) — тройная звезда в созвездии Рыси. Находится на расстоянии 214 световых лет от Солнечной системы. Её видимая звёздная величина 4,87m, звезда видна невооружённым глазом, 11-я по блеску в созвездии Рыси. Лучевая скорость относительно Солнечной системы близка к нулю.
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