Astronomy:HD 165516
From HandWiki
Short description: Star in the constellation Sagittarius
  | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 18h 07m 11.35s[1] |
| Declination | −21° 26′ 38.2″[1] |
| Apparent magnitude (V) | +6.33[2] |
| Characteristics | |
| Spectral type | B1/2Ib[3] |
| U−B color index | −0.72[2] |
| B−V color index | +0.12[2] |
| Astrometry | |
| Radial velocity (Rv) | -8.50[4] km/s |
| Proper motion (μ) | RA: −0.23[1] mas/yr Dec.: −1.15[1] mas/yr |
| Parallax (π) | 1.39 ± 0.49[1] mas |
| Distance | approx. 2,300 ly (approx. 700 pc) |
| Absolute magnitude (MV) | −5.8[5] |
| Details | |
| Mass | 10.1[6] M☉ |
| Radius | 26[7] R☉ |
| Temperature | 25,000[8] K |
| Rotational velocity (v sin i) | 55[9] km/s |
| Age | 22.5[6] Myr |
| Other designations | |
HR 6762, HD 165516, HIP 88760, BD-21°4855 | |
| Database references | |
| SIMBAD | data |
HD 165516 is a blue supergiant star in the constellation Sagittarius. It is part of the Sagittarius OB1 association and appears against a rich Milky Way starfield near the Triffid Nebula and Lagoon Nebula.
HD 165516 is close to a small reflection and emission nebula, and an associated loose open cluster. The nebula is catalogued as GN 18.05.6,[10] but was first listed as VdB 113.[11] That name has since been used for the cluster itself, which is likely more distant than HD 165516. The whole cluster is less than a quarter of a degree across, with dozens of members from 8th magnitude downwards. V4381 Sagittarii is listed as a probable member, while HD 165516 and the nearby Wolf-Rayet star WR 111 are considered unlikely to be members.[12]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237. Bibcode: 2002yCat.2237....0D.
- ↑ Houk, N.; Smith-Moore, M. (1988). "Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0". Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4. Bibcode: 1988mcts.book.....H.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ Humphreys, R. M. (1978). "Studies of luminous stars in nearby galaxies. I. Supergiants and O stars in the Milky Way". The Astrophysical Journal Supplement Series 38: 309. doi:10.1086/190559. Bibcode: 1978ApJS...38..309H.
- ↑ 6.0 6.1 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (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.
- ↑ Wesselink, A. J.; Paranya, K.; Devorkin, K. (1972). "Catalogue of stellar dimensions". Astronomy and Astrophysics Supplement 7: 257. Bibcode: 1972A&AS....7..257W.
- ↑ Gulati, R. K.; Malagnini, M. L.; Morossi, C. (1989). "Empirical temperature calibrations for early-type stars". Astronomy and Astrophysics Supplement Series 80: 73. Bibcode: 1989A&AS...80...73G.
- ↑ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal 573 (1): 359–365. doi:10.1086/340590. Bibcode: 2002ApJ...573..359A.
- ↑ Magakian, T. Yu. (2003). "Merged catalogue of reflection nebulae". Astronomy and Astrophysics 399: 141–145. doi:10.1051/0004-6361:20021743. Bibcode: 2003A&A...399..141M.
- ↑ Van Den Bergh, S. (1966). "A study of reflection nebulae". Astronomical Journal 71: 990. doi:10.1086/109995. Bibcode: 1966AJ.....71..990V.
- ↑ Kharchenko, N. V.; Piskunov, A. E.; Schilbach, E.; Röser, S.; Scholz, R.-D. (2013). "Global survey of star clusters in the Milky Way. II. The catalogue of basic parameters". Astronomy & Astrophysics 558: A53. doi:10.1051/0004-6361/201322302. Bibcode: 2013A&A...558A..53K.
External links
- Image of VdB113 HD 165516 is the lower of the two bright white stars.
 |  |
