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36 Draconis

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Star in the constellation Draco
36 Draconis
Observation data
Epoch J2000      Equinox
Constellation Draco
Right ascension 18 13 53.83332
Declination +64° 23′ 50.2330″
Apparent magnitude (V) 4.99
Characteristics
Spectral type F5 V + M3
B−V color index +0.40
Astrometry
Radial velocity (Rv)−35.6 km/s
Proper motion (μ) RA: +351.73 mas/yr
Dec.: +351.73 mas/yr
Parallax (π)43.63 ± 0.17 mas
Distance74.8 ± 0.3 ly
(22.92 ± 0.09 pc)
Absolute magnitude (MV)3.14 + 7.4
Details
Mass1.23±0.15 M☉
Radius1.635±0.037 R☉
Luminosity4.66±0.12 L☉
Surface gravity (log g)4.1±0.5 cgs
Temperature6,638±83 K
Metallicity −0.3±0.1 dex
Rotational velocity (v sin i)8 km/s
Age2.95 Gyr
Other designations
36 Dra, BD+64° 1252, FK5 685, GJ 9619, HD 168151, HIP 89348, HR 6850, SAO 17828
Database references
SIMBADdata

36 Draconis is a star in the northern constellation Draco. It is faintly visible to the naked eye with an apparent visual magnitude of 4.99. Based upon an annual parallax shift of 43.63 mas, it is located about 74.8 light years away. At that distance, the visual magnitude is diminished by an extinction of 0.129 due to interstellar dust. The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.353 arc seconds per year. It is moving closer to the Sun with a radial velocity of −35.6 km/s.

This is an ordinary F-type main-sequence star with a stellar classification of F5 V. It has 1.23 times the mass of the Sun and 1.64 times the Sun's radius. The star is around three billion years old and is spinning with a projected rotational velocity of 8 km/s. It is radiating 4.7 times the Sun's luminosity from its photosphere at an effective temperature of 6,638 K.

Observations carried out in 2010 and 2012 detected a faint companion at an angular separation of 3.3 arcseconds. Judging by the age and magnitude, this is a red dwarf of class M3.

References

  1. ^ van Leeuwen, F. (November 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. ^ Ligi, R.; et al. (February 2016), "Radii, masses, and ages of 18 bright stars using interferometry and new estimations of exoplanetary parameters", Astronomy & Astrophysics, 586: 23, arXiv:1511.03197, Bibcode:2016A&A...586A..94L, doi:10.1051/0004-6361/201527054, S2CID 15941645, A94.
  3. ^ Takeda, Yoichi; et al. (February 2005), "High-Dispersion Spectra Collection of Nearby F-K Stars at Okayama Astrophysical Observatory: A Basis for Spectroscopic Abundance Standards", Publications of the Astronomical Society of Japan, 57 (1): 13–25, Bibcode:2005PASJ...57...13T, doi:10.1093/pasj/57.1.13.
  4. ^ Rodriguez, David R.; et al. (May 2015), "Stellar multiplicity and debris discs: an unbiased sample", Monthly Notices of the Royal Astronomical Society, 449 (3): 3160–3170, arXiv:1503.01320, Bibcode:2015MNRAS.449.3160R, doi:10.1093/mnras/stv483, S2CID 119237891.
  5. ^ Takeda, Yoichi (April 2007), "Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database", Publications of the Astronomical Society of Japan, 59 (2): 335–356, Bibcode:2007PASJ...59..335T, doi:10.1093/pasj/59.2.335.
  6. "36 Dra". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-01-27.
  7. Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal, 129 (3): 1483–1522, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854, S2CID 2603568.


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