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HD 182681
	Image of the debris disk from the REASONS survey
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Sagittarius
Right ascension	19h 26m 56.4828s
Declination	−29° 44′ 35.612″
Apparent magnitude (V)	+5.64
Characteristics
Spectral type	B8.5V
Astrometry
Radial velocity (Rv)	1.40 km/s
Proper motion (μ)	RA: +18.349 mas/yr ; Dec.: -50.126 mas/yr
Parallax (π)	14.0013 ± 0.1325 mas
Distance	233 ± 2 ly ; (71.4 ± 0.7 pc)
Absolute magnitude (MV)	+1.44
Details
Mass	2.33 M☉
Radius	2.8 R☉
Luminosity	31 L☉
Surface gravity (log g)	4.3 cgs
Temperature	10,046 K
Rotational velocity (v sin i)	277 km/s
Age	107 Myr
Other designations
	CD−29°16140, HD 182681, HIP 95619, HR 7380, SAO 188127, 186 G. Sagittarii
Database references
SIMBAD	data

HD 182681 (186 G. Sagittarii) is a single,^[12] 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.^[5]

This is a B-type main sequence star with a stellar classification of B8.5V. The star is about 107^[9] million years old and is spinning rapidly with a projected rotational velocity of 277 km/s.^[7] It has an infrared excess, which suggests a debris disk is orbiting the star at a radius of 47 AU with a mean temperature of 90 K.^[13]

References

^ Matrà, L.; Marino, S.; Wilner, D. J.; Kennedy, G. M.; Booth, M.; Krivov, A. V.; Williams, J. P.; Hughes, A. M.; Burgo, C. del (2025-01-15). "REsolved ALMA and SMA Observations of Nearby Stars (REASONS): A population of 74 resolved planetesimal belts at millimetre wavelengths". arXiv:2501.09058 [astro-ph].
^ ^a ^b ^c ^d ^e 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. (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.
^ ^a ^b 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, arXiv:0705.0878, Bibcode:2007AN....328..889K, doi:10.1002/asna.200710776, S2CID 119323941.
^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
^ ^a ^b ^c ^d ^e Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
^ 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, arXiv:1403.3435, Bibcode:2014ApJS..212...10P, doi:10.1088/0067-0049/212/1/10, S2CID 119219094.
^ ^a ^b ^c Gullikson, Kevin; Kraus, Adam; Dodson-Robinson, Sarah (2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal, 152 (2): 40, arXiv:1604.06456, Bibcode:2016AJ....152...40G, doi:10.3847/0004-6256/152/2/40, S2CID 119179065.
^ "HD 182681". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-05.
^ 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
^ Cotten, Tara H.; Song, Inseok (July 2016), "A Comprehensive Census of Nearby Infrared Excess Stars", The Astrophysical Journal Supplement Series, 225 (1): 24, arXiv:1606.01134, Bibcode:2016ApJS..225...15C, doi:10.3847/0067-0049/225/1/15, S2CID 118438871, 15.