HD 182681

HD 182681
Observation data
Epoch J2000.0      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 mas[1]
Distance233 ± 2 ly
(71.4 ± 0.7 pc)
Absolute magnitude (MV)+1.44[5]
Details
Mass2.33[6] M☉
Radius2.8[7] R☉
Luminosity31[6] L☉
Surface gravity (log g)4.3[8] cgs
Temperature10,046[6] K
Rotational velocity (v sin i)277[6] km/s
Age107[8] Myr
Other designations
CD−29°16140, HD 182681, HIP 95619, HR 7380, SAO 188127,[9] 186 G. Sagittarii[10]
Database references
SIMBADdata

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 AU with a mean temperature of 90 K.[12]

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  2. ^ Cite error: The named reference tycho2 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference hube1970 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference ASCC was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference xhip was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference patel2014 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference gullikson2016 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference gould was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Cotten2016 was invoked but never defined (see the help page).