42 Orionis

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42 Orionis
Location of 42 Orionis (marked red)
Observation data
Epoch J2000      Equinox J2000
Constellation Orion
Right ascension 05h 35m 23.16427s[1]
Declination −4° 50′ 18.0881″[1]
Apparent magnitude (V) 4.59[2]
Characteristics
Spectral type B1V[3]
U−B color index -0.94[2]
B−V color index -0.19[2]
Distance
approx. 900 ly
(approx. 270 pc)
Details
Rotational velocity (v sin i)
20[7] km/s
SAO 132320, WDS
 J05354-0450AB
Database references
SIMBADdata
NGC 1977
.

42 Orionis is a class B1V[3] (blue main-sequence) star in the constellation Orion. Its apparent magnitude is 4.59[2] and it is approximately 900 light years away based on parallax.[1]

The primary star, Aa, has one spectroscopic companion Ab of magnitude 6.3 and separation 0.16", and a more distant companion B of 7.5 magnitude at 1.6" separation.[8][9]

c Orionis is surrounded by

NGC 1977 one of a smaller fainter group of named nebulae just north of the Orion Nebula
. c Ori is the star which excites and illuminates NGC 1977.

References

  1. ^
    S2CID 18759600. Vizier catalog entry
  2. ^
    Bibcode:2002yCat.2237....0D
    .
  3. ^
    Bibcode:1995yCat.5050....0H
    .
  4. S2CID 119231169
    .
  5. S2CID 118629873. Vizier catalog entry
  6. S2CID 111387483. Vizier catalog entry
  7. doi:10.1086/340590
    .
  8. doi:10.1086/323920. Vizier catalog entry
  9. S2CID 30737411
    .
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