Astronomy:HD 182681
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Short description: B-type main sequence star in the constellation Sagittarius
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 19h 26m 56.4828s[1] |
| Declination | −29° 44′ 35.612″[1] |
| Apparent magnitude (V) | +5.64[2] |
| Characteristics | |
| Spectral type | B8.5V[3] |
| Astrometry | |
| Radial velocity (Rv) | 1.40[4] km/s |
| Proper motion (μ) | RA: +18.349[1] mas/yr Dec.: -50.126[1] mas/yr |
| Parallax (π) | 14.0013 ± 0.1325[1] mas |
| Distance | 233 ± 2 ly (71.4 ± 0.7 pc) |
| Absolute magnitude (MV) | +1.44[5] |
| Details | |
| Mass | 2.33[6] M☉ |
| Radius | 2.8[7] R☉ |
| Luminosity | 31[6] L☉ |
| Surface gravity (log g) | 4.3[8] cgs |
| Temperature | 10,046[6] K |
| Rotational velocity (v sin i) | 277[6] km/s |
| Age | 107[8] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 182681 (186 G. Sagittarii) is a single,[11] blue-hued star in the zodiac constellation of Sagittarius. It has an apparent visual magnitude of +5.64, which is bright enough to be visible to the naked eye in good conditions. Based upon an annual parallax shift of 14.0013 mas as seen from Earth, this star is located around 233 light years from the Sun. It is moving away from the Sun with a radial velocity of 1.40 km/s.[4]
This is a B-type main sequence star with a stellar classification of B8.5V. The star is about 107[8] million years old and is spinning rapidly with a projected rotational velocity of 277 km/s.[6] It has an infrared excess, which suggests a debris disk is orbiting the star at a radius of 47 astronomical unit|AU with a mean temperature of 90 K.[12]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 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. 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. et al. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics 355: L27, Bibcode: 2000A&A...355L..27H.
- ↑ Hube, Douglas P. (1970), "The radial velocities of 335 late B-type stars", Memoirs of the Royal Astronomical Society 72: 233, Bibcode: 1970MmRAS..72..233H.
- ↑ 4.0 4.1 Kharchenko, N. V.; Scholz, R. -D.; Piskunov, A. E.; Röser, S.; Schilbach, E. (2007), "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ̃55000 stars and mean radial velocities of 516 Galactic open clusters and associations", Astronomische Nachrichten 328 (9): 889, doi:10.1002/asna.200710776, Bibcode: 2007AN....328..889K.
- ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 6.0 6.1 6.2 6.3 6.4 Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ Patel, Rahul I.; Metchev, Stanimir A.; Heinze, Aren (2014), "A Sensitive Identification of Warm Debris Disks in the Solar Neighborhood through Precise Calibration of Saturated WISE Photometry", The Astrophysical Journal Supplement Series 212 (1): 10, doi:10.1088/0067-0049/212/1/10, Bibcode: 2014ApJS..212...10P.
- ↑ 8.0 8.1 8.2 Gullikson, Kevin; Kraus, Adam; Dodson-Robinson, Sarah (2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal 152 (2): 40, doi:10.3847/0004-6256/152/2/40, Bibcode: 2016AJ....152...40G.
- ↑ "HD 182681". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+182681.
- ↑ Gould, Benjamin Apthorp (1879), "Uranometria Argentina: Brightness and position of every fixed star, down to the seventh magnitude, within one hundred degrees of the South Pole; with atlas", Resultados del Observatorio Nacional Argentino 1: I, Bibcode: 1879RNAO....1....1G.
- ↑ 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.
- ↑ Cotten, Tara H.; Song, Inseok (July 2016), "A Comprehensive Census of Nearby Infrared Excess Stars", The Astrophysical Journal Supplement Series 225 (1): 24, doi:10.3847/0067-0049/225/1/15, 15, Bibcode: 2016ApJS..225...15C.
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