HD 12055

Last updated
HD 12055
Phoenix constellation map.svg
Red circle.svg
Location of HD 12055 (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Phoenix
Right ascension 01h 57m 10.08491s [1]
Declination −47° 23 07.0936 [1]
Apparent magnitude  (V)4.82 [2]
Characteristics
Spectral type G6III-IIIb [3]
U−B color index +0.51 [4]
B−V color index +0.88 [4]
Astrometry
Radial velocity (Rv)+13.36±0.22 [1]  km/s
Proper motion (μ)RA: +102.213 [1]   mas/yr
Dec.: +16.301 [1]   mas/yr
Parallax (π)13.1010 ± 0.2295  mas [1]
Distance 249 ± 4  ly
(76 ± 1  pc)
Absolute magnitude  (MV)0.42 [2]
Details
Mass 2.39 [5]   M
Radius 10.40+0.46
−0.70
[1]   R
Luminosity 71.1±1.4 [1]   L
Surface gravity (log g)3.04 [6]   cgs
Temperature 5,196+185
−112
[1]   K
Metallicity [Fe/H]–0.02 [6]   dex
Rotational velocity (v sin i)5.7±1.0 [7]  km/s
Age 1.08 [5]   Gyr
Other designations
CD−47°597, GC  2369, HD  12055, HIP  9095, HR  574, SAO  215715 [8]
Database references
SIMBAD data

HD 12055 is a candidate astrometric binary [9] star system in the southern constellation of Phoenix, near the eastern constellation border with Eridanus. It is yellow in hue and is visible to the naked eye with an apparent visual magnitude of 4.82. [2] The system is located at a distance of approximately 249  light years from the Sun based on parallax, and is drifting further away with a radial velocity of +13 km/s. [1]

The visible component is an aging giant star with a stellar classification of G6III-IIIb. [3] With the supply of hydrogen at its core exhausted, the star has cooled and expanded off the main sequence – at present it has ten [1] times the girth of the Sun. It is around a billion [5] years old with 2.4 [5] times the mass of the Sun and is spinning with a projected rotational velocity of 6 km/s. [7] The star is radiating 71 times the luminosity of the Sun from its photosphere at an effective temperature of 5,196 K. [1]

This system is the most likely source of X-ray emission coming from these coordinates. [10]

Related Research Articles

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<span class="mw-page-title-main">Nu Tauri</span> Star in the constellation Taurus

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16 Cephei is a single star located about 119 light years away from the Sun in the constellation of Cepheus. It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of 5.036. The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.174 arc seconds per annum. It is moving closer to the Earth with a heliocentric radial velocity of −21 km/s.

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<span class="mw-page-title-main">HD 24160</span> G-type giant star in the constellation Eridani

HD 24160 is a single star in the equatorial constellation of Eridanus. It is visible to the naked eye with an apparent visual magnitude of 4.17. The distance to HD 24160 can be estimated from its annual parallax shift of 15.0 mas, yielding a separation of 217 light years. It is moving further from the Earth with a heliocentric radial velocity of +2 km/s. This object is a coronal member of the Ursa Major Moving Group of stars that share a common motion through space.

<span class="mw-page-title-main">Nu Hydri</span> Star in the constellation Hydrus

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<span class="mw-page-title-main">Rho Pegasi</span> Star in the constellation Pegasus

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<span class="mw-page-title-main">17 Persei</span> Star in the constellation Perseus

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<span class="mw-page-title-main">54 Persei</span> Star in the constellation Perseus

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<span class="mw-page-title-main">29 Persei</span> Star in the constellation Perseus

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<span class="mw-page-title-main">31 Persei</span> Star in the constellation Perseus

31 Persei is a single star in the northern constellation of Perseus. It is visible to the naked eye as a dim, blue-white hued point of light with an apparent visual magnitude of 5.05. This star is located around 172 parsecs (560 ly) away from the Sun, and it is drifting closer with a radial velocity of −1.6 km/s. It is a likely member of the Alpha Persei Cluster.

<span class="mw-page-title-main">36 Persei</span> Star in the constellation Perseus

36 Persei is a solitary, variable star located 121 light years away from the Sun in the northern constellation of Perseus. It is visible to the naked eye as a dim, yellow-white hued point of light with a baseline apparent visual magnitude of 5.32. The star is drifting closer to the Sun with a heliocentric radial velocity of −47.5 km/s, and may come as close as 36.6 light-years in 661,000 years.

ν Gruis, Latinised as Nu Gruis, is a solitary, yellow-hued star in the southern constellation of Grus. It is visible to the naked eye with an apparent visual magnitude of 5.47. The distance to this star, as determined using an annual parallax shift of 11.6 mas as seen from the Earth, is 280 light years. It is drifting further away with a heliocentric radial velocity of +11 km/s.

References

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  2. 1 2 3 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. Vizier catalog entry
  3. 1 2 Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
  4. 1 2 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42 (2): 443. Bibcode:2014JAVSO..42..443M. Vizier catalog entry
  5. 1 2 3 4 Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 88, arXiv: 1507.01466 , Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID   118505114.
  6. 1 2 Alves, S.; et al. (April 2015). "Determination of the spectroscopic stellar parameters for 257 field giant stars". Monthly Notices of the Royal Astronomical Society. 448 (3): 2749–2765. arXiv: 1503.02556 . Bibcode:2015MNRAS.448.2749A. doi:10.1093/mnras/stv189.
  7. 1 2 De Medeiros, J. R.; et al. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv: 1312.3474 . Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. S2CID   54046583. Vizier catalog entry
  8. "HD 12055". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-11-13.
  9. 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.
  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. arXiv: 0910.3229 . Bibcode:2009ApJS..184..138H. doi:10.1088/0067-0049/184/1/138. S2CID   119267456.