HD 189831

Last updated
HD 189831
Observation data
Epoch J2000       Equinox J2000
Constellation Sagittarius
Right ascension 20h 03m 33.45912s [1]
Declination −37° 56 26.5236 [1]
Apparent magnitude  (V)4.77 [2]
Characteristics
Spectral type K5III [3]
U−B color index +1.68 [4]
B−V color index +1.41 [4]
Astrometry
Radial velocity (Rv)-38.30 [5]  km/s
Proper motion (μ)RA: +64.47 [1]   mas/yr
Dec.: -86.43 [1]   mas/yr
Parallax (π)8.90 ± 0.29  mas [1]
Distance 370 ± 10  ly
(112 ± 4  pc)
Absolute magnitude  (MV)-0.48 [2]
Details
Luminosity 316 [2]   L
Temperature 4,099 [6]   K
Rotational velocity (v sin i)< 1.0 [7]  km/s
Other designations
CD-38°13828, FK5  3602, GC  27779, GSC  07947-03890, HIP  98761, HR  7652, HD  189831, SAO  211767
Database references
SIMBAD data

HD 189831 is a class K5III [3] (orange giant) star in the constellation Sagittarius. Its apparent magnitude is 4.77 [2] and it is approximately 366 light years away based on parallax. [1]

Related Research Articles

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<span class="mw-page-title-main">HD 61330</span> Star in the constellation Puppis

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References

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