Epoch J2000.0 Equinox J2000.0
|Right ascension||5h 35m 02.68074s|
|Declination||−06° 00′ 07.3036″|
|Apparent magnitude (V)||4.72|
|Spectral type||B0.5 V|
|U−B color index||−0.98|
|B−V color index||−0.22|
|Radial velocity (Rv)||+27.7 km/s|
|Proper motion (μ)||RA: −0.66 mas/yr
Dec.: +0.01 mas/yr
|Parallax (π)||2.02 ± 0.31 mas|
|Distance||approx. 1,600 ly
(approx. 500 pc)
|Absolute magnitude (MV)||−3.18|
|Surface gravity (log g)||4.10 cgs|
|Metallicity [Fe/H]||−0.20 dex|
|Rotational velocity (v sin i)||28 km/s|
HD 36960 (HR 2887) is a B-type main-sequence star in the constellation Orion. At an apparent magnitude of +4.78 it is easily visible to the naked eye in many areas, though in most urban areas it cannot be seen due to light pollution. Although it does not have a Bayer or Flamsteed designation, it is brighter than over 30 Flamsteed stars in Orion]], as well as being brighter than any of the stars in the nearby Orion Nebula such as θ1 Orionis C and θ2 Orionis.
HD 36960 forms a close pair with the slightly fainter HD 36959 36" away. Multiple star catalogues also list the 9th magnitude BD-06°1233 as part of the system. HD 36959 is itself a very close binary with a 9th magnitude companion. All these stars are likely members of open cluster NGC 1980 which includes ι Orionis 7' away.
At over 15 solar masses, it shines with around 20,000 times the Sun's luminosity due to its high surface temperature of 29,000 K and radius over five times that of the sun. It is calculated to be around six million years old, consistent with other stars thought to be members of NGC 1980.
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