HD 151613

Short description: Binary star system in the constellation in the constellation of Draco

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

BD+57° 1702, FK5 627, GJ 9578, HD 151613, HIP 82020, HR 6237, SAO 30076, WDS 16453+5647[8]

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. ↑ 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. ↑ 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. ↑ 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. ↑ 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. ↑ 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.
6. ↑ 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. ↑ 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
8. ↑ "HD 151613". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+151613.
9. ↑ 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.
10. ↑ 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.

* v
* t
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Draco constellation

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* 68

Variable|

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HR|

* 3751
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HD|

* 81817
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