Astronomy:HD 151613
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Draco |
| Right ascension | 16h 45m 17.88121s[1] |
| Declination | +56° 46′ 54.7985″[1] |
| Apparent magnitude (V) | 4.84[2] |
| Characteristics | |
| Spectral type | F2 V[3] |
| B−V color index | 0.375±0.013[2] |
| Astrometry | |
| Radial velocity (Rv) | −2.0[4] km/s |
| Proper motion (μ) | RA: 24.85 mas/yr Dec.: 67.07 mas/yr |
| Parallax (π) | 39.2932 ± 0.3182[1] mas |
| Distance | 83.0 ± 0.7 ly (25.4 ± 0.2 pc) |
| Absolute magnitude (MV) | 2.71[2] |
| Orbit[5] | |
| Period (P) | 363.57 d |
| Eccentricity (e) | 0.35 |
| Periastron epoch (T) | 2415232.4 JD |
| Argument of periastron (ω) (secondary) | 80.7° |
| Semi-amplitude (K1) (primary) | 6.0 km/s |
| Details | |
| Mass | 1.43[4] M☉ |
| Radius | 1.6[6] R☉ |
| Luminosity | 6.91[2] L☉ |
| Surface gravity (log g) | 4.05[4] cgs |
| Temperature | 6,630[7] K |
| Metallicity [Fe/H] | −0.23[4] dex |
| Rotational velocity (v sin i) | 47.5±2.4[7] km/s |
| Age | 2.30[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 151613 is a binary star[5] system in the northern circumpolar constellation of Draco. It is visible to the naked eye with an apparent visual magnitude of 4.84.[2] The distance to this star, as estimated from its annual parallax shift of 39.3 mas,[1] is 83 light years. It is moving closer to the Earth with a heliocentric radial velocity of −2 km/s.[4]
This is a single-lined spectroscopic binary[3] system with an orbital period of 363.57 days and an eccentricity of 0.35.[5] The pair were resolved through speckle interferometry in 1977, showing an angular separation of 0.041″. They were later resolved in 1981 with a separation of 0.047″, but were unresolved during 20 other attempts between 1976–1991.[9] The system is a source of X-ray emission.[10] The visible component is an F-type main-sequence star with a stellar classification of F2 V.[3] It is around 2.3[4] billion years old with a projected rotational velocity of 48 km/s.[7]
References
- ↑ 1.0 1.1 1.2 1.3 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.
- ↑ 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 3.2 Abt, Helmut A. (2009), "MK Classifications of Spectroscopic Binaries", The Astrophysical Journal Supplement 180 (1): 117–18, doi:10.1088/0067-0049/180/1/117, Bibcode: 2009ApJS..180..117A.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 Casagrande, L. et al. (June 2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy and Astrophysics 530: A138, doi:10.1051/0004-6361/201016276, Bibcode: 2011A&A...530A.138C.
- ↑ 5.0 5.1 5.2 Pourbaix, D. et al. (2004), "SB9: The Ninth Catalogue of Spectroscopic Binary Orbits", Astronomy & Astrophysics 424: 727–732, doi:10.1051/0004-6361:20041213, Bibcode: 2004A&A...424..727P.
- ↑ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ 7.0 7.1 7.2 Reiners, Ansgar (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics 446 (1): 267–277, doi:10.1051/0004-6361:20053911, Bibcode: 2006A&A...446..267R
- ↑ "HD 151613". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+151613.
- ↑ Hartkopf, William I.; Mason, Brian D. (September 2009), "Speckle Interferometry at Mount Wilson Observatory: Observations Obtained in 2006-2007 and 35 New Orbits", The Astronomical Journal 138 (3): 813–826, doi:10.1088/0004-6256/138/3/813, Bibcode: 2009AJ....138..813H.
- ↑ Haakonsen, Christian Bernt; Rutledge, Robert E. (September 2009), "XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources", The Astrophysical Journal Supplement 184 (1): 138–151, doi:10.1088/0067-0049/184/1/138, Bibcode: 2009ApJS..184..138H.
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