HD_211392 Knowpia

HD 211392
Observation data; Epoch J2000 Equinox J2000
Constellation	Aquarius
Right ascension	22h 16m 52.56602s
Declination	−09° 02′ 24.2432″
Apparent magnitude (V)	5.96
Characteristics
Spectral type	K3III
U−B color index	+1.14
B−V color index	+1.16
Astrometry
Radial velocity (Rv)	12.1 km/s
Proper motion (μ)	RA: -57.80 mas/yr ; Dec.: -12.41 mas/yr
Parallax (π)	8.83 ± 0.43 mas
Distance	370 ± 20 ly ; (113 ± 6 pc)
Other designations
	BD-09° 5948, HD 211392, HIP 110009, HR 8500, SAO 145992.
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue,; CCDM (2002),; Bright Star Catalogue (5th rev. ed.)

HD 211392 is a suspected^[5] variable star in the equatorial constellation of Aquarius, positioned about 370 light-years away.^[1] With an apparent magnitude close to six, according to the Bortle scale it is just visible to the naked eye from dark, rural skies. It is a giant star with a stellar classification of K3III.^[2]

References edit

^ ^a ^b ^c ^d ^e ^f van Leeuwen, F. (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, S2CID 18759600
^ ^a ^b ^c Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976
^ ^a ^b Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J
^ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington D.C., Bibcode:1953GCRV..C......0W
^ Kukarkin, B. V.; et al. (1981), "Nachrichtenblatt der Vereinigung der Sternfreunde e.V. (Catalogue of suspected variable stars)", Nachrichtenblatt der Vereinigung der Sternfreunde E.V. (1981), Moscow: Academy of Sciences USSR Shternberg, Bibcode:1981NVS...C......0K

Observation data Epoch J2000 Equinox J2000
Constellation	Aquarius
Right ascension	22^h 16^m 52.56602^s^[1]
Declination	−09° 02′ 24.2432″^[1]
Apparent magnitude (V)	5.96^[2]
Characteristics
Spectral type	K3III^[2]
U−B color index	+1.14^[3]
B−V color index	+1.16^[3]
Astrometry

Radial velocity (R_v)	12.1^[4] km/s
Proper motion (μ)	RA: -57.80^[1] mas/yr Dec.: -12.41^[1] mas/yr
Parallax (π)	8.83 ± 0.43 mas^[1]
Distance	370 ± 20 ly (113 ± 6 pc)

Other designations
BD-09° 5948, HD 211392, HIP 110009, HR 8500, SAO 145992.
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)