HD 36780

HD 36780
	Location of HD 36780 (circled) in the Orion's Belt region; Credit: Martin Mutti
Observation data; Epoch J2000 Equinox J2000
Constellation	Orion
Right ascension	05h 34m 04.04767s
Declination	−01° 28′ 12.9115″
Apparent magnitude (V)	+5.895
Characteristics
Spectral type	K4III
U−B color index	+1.87
B−V color index	+1.55
Astrometry
Radial velocity (Rv)	88.40 ± 1.7 km/s
Proper motion (μ)	RA: −13.59 mas/yr ; Dec.: −19.95 mas/yr
Parallax (π)	4.77 ± 0.54 mas
Distance	approx. 680 ly ; (approx. 210 pc)
Other designations
	HD 36780, BD−01° 950, HIP 26108, HR 1874, SAO 132270
Database references
SIMBAD	data

HD 36780 is an orange giant star with a visual magnitude of 5.92, barely visible by the naked eye. It is located in Orion's belt, 843 light years distant from Earth.

References

^ ^a ^b ^c ^d ^e van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 5: 0. Bibcode:1999MSS...C05....0H.
^ ^a ^b Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
^ "HD 36780". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 March 2017.

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[HIP-1] van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.

[TYC2-2] Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.

[HD-3] Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 5: 0. Bibcode:1999MSS...C05....0H.

[UBVRI-4] Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.

[RV-5] Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.

[SIMBAD-6] "HD 36780". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 March 2017.

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Observation data Epoch J2000 Equinox J2000
Location of HD 36780 (circled) in the Orion's Belt region Credit: Martin Mutti
Constellation	Orion
Right ascension	05^h 34^m 04.04767^s^[1]
Declination	−01° 28′ 12.9115″^[1]
Apparent magnitude (V)	+5.895^[2]
Characteristics
Spectral type	K4III^[3]
U−B color index	+1.87^[4]
B−V color index	+1.55^[4]
Astrometry

Radial velocity (R_v)	88.40 ± 1.7^[5] km/s
Proper motion (μ)	RA: −13.59^[1] mas/yr Dec.: −19.95^[1] mas/yr
Parallax (π)	4.77 ± 0.54 mas^[1]
Distance	approx. 680 ly (approx. 210 pc)

Other designations
HD 36780, BD−01° 950, HIP 26108, HR 1874, SAO 132270^[6]
Database references
SIMBAD	data