HD 200661
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Equuleus |
Right ascension | 21h 04m 41.64s[1] |
Declination | 02° 56′ 32.18″[1] |
Apparent magnitude (V) | 6.41±0.01[2] |
Characteristics | |
Spectral type | K0III[3] |
U−B color index | +0.89[4] |
B−V color index | +1.06[4] |
Astrometry | |
Radial velocity (Rv) | -12.10[5] km/s |
Proper motion (μ) | RA: +13.064±0.086[1] mas/yr Dec.: +6.155±0.066[1] mas/yr |
Parallax (π) | 7.5081 ± 0.0431[1] mas |
Distance | 434 ± 2 ly (133.2 ± 0.8 pc) |
Absolute magnitude (MV) | +0.53[6] |
Details | |
Mass | 1.74[7] M☉ |
Radius | 11.07+0.16 −0.57[1] R☉ |
Luminosity | 55.9±0.5[1] L☉ |
Surface gravity (log g) | 2.65[7] cgs |
Temperature | 4,743+127 −33[1] K |
Metallicity [Fe/H] | -0.1[7] dex |
Other designations | |
Database references | |
SIMBAD | data |
HD 200661 (HR 8067) is a star in the constellation Equuleus. With an apparent magnitude of 6.41, it’s near the max naked eye visibility. The star is located 434 light-years (133 parsecs) based on parallax,[1] but is drifting closer with a heiolcentric radial velocity of -12.1 km/s.[5]
Properties[]
HD 200661 has a classification of “K0III”, which suggests it’s a K-type star that has exhausted hydrogen at its core. It has 1.74 times the Sun’s mass,[7] but has expanded to 11 times the Sun’s girth.[1] It radiates at about 56 solar luminosities[1] from it's photosphere at an effective temperature of 4743 K.[1]
References[]
- ^ Jump up to: a b c d e f g h i j k Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (1 March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. ISSN 0004-6361.
- ^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 05: 0. Bibcode:1999MSS...C05....0H.
- ^ Jump up to: a b Cousins, A. W. J. (1971). "Photometric standard stars". Royal Observatory Annals. 7.
- ^ Jump up to: a b Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
- ^ Anderson, E.; Francis, Ch. (1 May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38: 331–346. arXiv:1108.4971. doi:10.1134/S1063773712050015. ISSN 1063-7737.
- ^ Jump up to: a b c d Anders, F.; et al. (1 August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.
- ^ "HR 8067". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11–09–2021. Check date values in:
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Categories:
- Henry Draper Catalogue objects
- HR objects
- K-type giants
- Gould objects
- Hipparcos objects
- Durchmusterung objects