HD 167257

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HD 167257
Observation data
Epoch J2000      Equinox J2000
Constellation Telescopium
Right ascension 18h 17m 00.91889s[1]
Declination –51° 04′ 05.7601″[1]
Apparent magnitude (V) 6.05[2]
Characteristics
Spectral type B9V[3]
B−V color index -0.04[2]
Astrometry
Radial velocity (Rv)−5.1±4.3[4] km/s
Proper motion (μ) RA: +1.789±0.298[1] mas/yr
Dec.: −9.467±0.253[1] mas/yr
Parallax (π)7.6376 ± 0.1309[1] mas
Distance427 ± 7 ly
(131 ± 2 pc)
Details
Mass2.63±0.06[5] M☉
Radius2.8±0.1[6] R☉
Luminosity64.6+7.7
−8.7[5] L☉
Surface gravity (log g)3.97±0.06[6] cgs
Temperature10,139±47[5] K
Metallicity [Fe/H]-0.18[7] dex
Rotational velocity (v sin i)61[8] km/s
Age237[9] Myr
Other designations
HD 167257, HIP 89597, CD–51° 11460, HR 6821, SAO 245372
Database references
SIMBADdata

HD 167257 (HR 6821) is a star in the constellation Telescopium. With an apparent magnitude of 6.05, it is faintly visible to the naked eye. The star is located 427 light-years (131 parsecs) from the Solar System, but is drifting closer with a radial velocity of approximately 5 km/s. Owing to interstellar dust, the star is diminished by 0.3 magnitude at its current distance.[9]

Properties[]

This is a B-type main sequence star with 2.63 times the Sun's mass, and 2.8 times the Sun's radius. It radiates at 64.6 time the Sun's luminosity from its photosphere at an effective temperature of 10,139 K, which gives it a blue-white hue. HD 167257 has a modest rotation rate of 61 km/s, and has a poor metallicity, with 66% the abundance of heavy metals compared to the Sun.

References[]

  1. ^ a b c d 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.
  2. ^ a b 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. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. ^ Houk, Nancy (1978). "Michigan catalogue of two-dimensional spectral types for the HD stars". Ann Arbor : Dept. Of Astronomy, University of Michigan : Distributed by University Microfilms International, 1978-. Bibcode:1978mcts.book.....H.
  4. ^ Gontcharov, G. A. (1 November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.
  5. ^ a b c Zorec, J.; Royer, F. (1 January 2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. doi:10.1051/0004-6361/201117691. ISSN 0004-6361.
  6. ^ a b Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; De Lee, Nathan; Collins, Kevin; Latham, David W.; Muirhead, Philip S.; Chittidi, Jay; Rojas-Ayala, Bárbara; Fleming, Scott W.; Rose, Mark E.; Tenenbaum, Peter; Ting, Eric B.; Kane, Stephen R.; Barclay, Thomas; Bean, Jacob L.; Brassuer, C. E.; Charbonneau, David; Ge, Jian; Lissauer, Jack J.; Mann, Andrew W.; McLean, Brian; Mullally, Susan; Narita, Norio; Plavchan, Peter; Ricker, George R.; Sasselov, Dimitar; Seager, S.; Sharma, Sanjib; Shiao, Bernie; Sozzetti, Alessandro; Stello, Dennis; Vanderspek, Roland; Wallace, Geoff; Winn, Joshua N. (1 October 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158: 138. doi:10.3847/1538-3881/ab3467. hdl:1721.1/124721. ISSN 0004-6256.
  7. ^ Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevic, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (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.
  8. ^ Levato, H.; Grosso, M. (1 June 2004). "New Projected Rotational Velocities of All Southern B-type Stars of the Bright Star Catalogue". 215: 51. Cite journal requires |journal= (help)
  9. ^ a b Gontcharov, G. A. (1 November 2012). "Spatial distribution and kinematics of OB stars". Astronomy Letters. 38: 694–706. arXiv:1606.09028. doi:10.1134/S1063773712110035. ISSN 1063-7737.
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