15 Lyncis

15 Lyncis
Location of 15 Lyncis (circled in red)
Observation data
Epoch J2000      Equinox J2000
Constellation Lynx
Right ascension 06h 57m 16.60526s[1]
Declination +58° 25′ 21.9404″[1]
Apparent magnitude (V) 4.35[2] (4.7 / 5.8)[3]
Characteristics
Spectral type G8III + F8V[4]
U−B color index +0.51[5]
B−V color index +0.85[5]
Astrometry
Radial velocity (Rv)1.86±0.28[6] km/s
Proper motion (μ) RA: 6.08[1] mas/yr
Dec.: -122.83[1] mas/yr
Parallax (π)18.29±0.25 mas[1]
Distance178 ± 2 ly
(54.7 ± 0.7 pc)
Orbit[7]
Period (P)262.0 yr
Semi-major axis (a)1.19″
Eccentricity (e)0.74
Inclination (i)78.0°
Longitude of the node (Ω)43.4°
Periastron epoch (T)B 1992.68
Argument of periastron (ω)
(secondary)		98.0°
Details[6]
15 Lyn A
Radius8 R☉
Luminosity40 L☉
Surface gravity (log g)3.0 cgs
Temperature5,164±5 K
Metallicity [Fe/H]0.05 dex
Other designations
15 Lyn, BD+58°982, HD 50522, HIP 33449, HR 2560, SAO 26051
Database references
SIMBADdata

15 Lyncis is a binary star system in the northern constellation of Lynx. It is visible to the naked eye as a faint point of light with a combined apparent visual magnitude of 4.35.[2] Based on the system's parallax, it is located 178 light-years (54.7 parsecs) away.[1] The pair are moving away from the Earth with a heliocentric radial velocity of +2 km/s.[6]

A telescope reveals it is formed by two yellowish stars of magnitudes 4.7 and 5.8 that are 0.9 arcseconds apart.[3] The two stars orbit each other every 262 years and the orbital eccentricity is 0.74.[7] The components are a magnitude 4.7 evolved giant star of spectral type G8III, and a magnitude 5.8 F-type main-sequence star of spectral type F8V.[4] The former has exhausted the hydrogen at its core, causing it to expand to 8 times the Sun's radius. It is radiating 40 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,164 K.[6]

References

  1. ^ a b c d e f 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.
  2. ^ a b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  3. ^ a b Monks, Neale (2010). Go-To Telescopes Under Suburban Skies. New York, New York: Springer Science & Business Media. p. 58. ISBN 9781441968517.
  4. ^ a b 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.
  5. ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  6. ^ a b c d Massarotti, Alessandro; Latham, David W.; Stefanik, Robert P.; Fogel, Jeffrey (2008). "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity". The Astronomical Journal. 135 (1): 209–231. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209. S2CID 121883397.
  7. ^ a b "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Archived from the original on 1 August 2017. Retrieved 30 July 2017.

Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.