HD 36780

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HD 36780
Location of HD 36780 (circled) in the Orion's Belt region
Credit: Martin Mutti
Observation data
J2000
Constellation Orion
Right ascension 05h 34m 04.04714s[1]
Declination −01° 28′ 12.8681″[1]
Apparent magnitude (V) +5.92[2]
Characteristics
Evolutionary stage giant
Spectral type K4 III[3]
U−B color index +1.87[4]
B−V color index +1.535±0.008[2]
Distance
534 ± 10 ly
(164 ± 3 pc)
Absolute magnitude (MV)−0.65[2]
Details
Radius30.8+2.1
−4.2[1] R☉
Luminosity243.3±5.2[1] L☉
Temperature4,108+315
−135 K
HR 1874, SAO 132270[5]
Database references
SIMBADdata

HD 36780 is a

light years based on parallax.[1] It is drifting away from the Sun with a radial velocity of 84 km/s,[1] having come to within 185.6 light-years some 2.1 million years ago.[2]

This is an aging

luminosity of the Sun from its swollen photosphere at an effective temperature of 4,108 K.[1]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 119257644
    .
  3. ^
    Bibcode:1999MSS...C05....0H
    .
  4. Bibcode:1966CoLPL...4...99J
    .
  5. ^ "HD 36780". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 March 2017.
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