Astronomy:HD 10550
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cetus |
| Right ascension | 01h 42m 43.51077s[1] |
| Declination | –03° 41′ 24.7210″[1] |
| Apparent magnitude (V) | 4.98[2] |
| Characteristics | |
| Spectral type | K2/3 III CN II[3] |
| B−V color index | 1.378±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | −33.28±0.15[1] km/s |
| Proper motion (μ) | RA: −8.989[1] mas/yr Dec.: −33.238[1] mas/yr |
| Parallax (π) | 2.9564 ± 0.1730[1] mas |
| Distance | 1,100 ± 60 ly (340 ± 20 pc) |
| Absolute magnitude (MV) | −2.82[2] |
| Details | |
| Radius | 77[4] R☉ |
| Luminosity | 2,537.45[2] L☉ |
| Surface gravity (log g) | 1.83[5] cgs |
| Temperature | 4,110[5] K |
| Metallicity [Fe/H] | −0.12[5] dex |
| Rotational velocity (v sin i) | 10[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 10550 is a single[8] star in the equatorial constellation of Cetus. It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.98.[2] Based upon an annual parallax shift of 2.9564 mas,[1] it is located around 1,100 light years from the Sun. The star is moving closer with a heliocentric radial velocity of −33 km/s.[1] It has a high peculiar velocity of 72.7+5.7
−4.3 km/s and may be a runaway star.[9]
The stellar classification of this star is K2/3 III CN II,[3] showing the spectrum of an evolved K-type giant star with an overabundance of CN in the atmosphere. The measured angular diameter of this star, after correction for limb darkening, is 2.11±0.04 mas.[10] At the estimated distance of this star, this yields a physical size of about 77 times the radius of the Sun.[4] The star is radiating around 2,537[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,110 K.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 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 2.5 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 Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey 5, Bibcode: 1999MSS...C05....0H.
- ↑ 4.0 4.1 Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (3 ed.), Birkhäuser, ISBN 3-540-29692-1, https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41.. The radius (R*) is given by:
- [math]\displaystyle{ \begin{align} 2\cdot R_* & = \frac{(10^{-3}\cdot 338\cdot 2.11)\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\ & \approx 153\cdot R_{\bigodot} \end{align} }[/math]
- ↑ 5.0 5.1 5.2 5.3 Soubiran, C. et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics 515: A111, doi:10.1051/0004-6361/201014247, Bibcode: 2010A&A...515A.111S.
- ↑ Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago 239 (1): 1, Bibcode: 1970CoAsi.239....1B.
- ↑ "HD 10550". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+10550.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Tetzlaff, N. et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society 410 (1): 190–200, doi:10.1111/j.1365-2966.2010.17434.x, Bibcode: 2011MNRAS.410..190T.
- ↑ Richichi, A. et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics 431 (2): 773–777, doi:10.1051/0004-6361:20042039, Bibcode: 2005A&A...431..773R
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