HD 221148

HD 221148
Observation data; EpochJ2000EquinoxJ2000
Constellation	Aquarius
Right ascension	23h29m32.08207s
Declination	−04° 31′ 57.8915″
Apparent magnitude(V)	6.26
Characteristics
Spectral type	K3IIIv
U−Bcolor index	+1.20
B−Vcolor index	+1.10
Astrometry
Radial velocity(Rv)	−26.53±1.94km/s
Proper motion(μ)	RA:+181.03mas/yr; Dec.:−232.23mas/yr
Parallax(π)	21.14 ± 0.56mas
Distance	154 ± 4ly; (47 ± 1pc)
Details
Radius	5R☉
Luminosity	8.9L☉
Surface gravity(logg)	3.1cgs
Temperature	4,592K
Metallicity[Fe/H]	+0.11dex
Rotational velocity(vsini)	2.2km/s
Other designations
	BD-05° 5999,FK53881,HD221148,HIP115953,HR8924,LTT9560,SAO146736.
Database references
SIMBAD	data

HD 221148is suspectedvariable starin the equatorialconstellationofAquarius.The spectrum of the star shows exceptionally strong levels ofCN;one of the highest cyanogen indices measured.^[4]

References[edit]

^^a ^b ^c ^d ^evan 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^^a ^b ^cMermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)",Catalogue of Eggen's UBV Data. SIMBAD,Bibcode:1986EgUBV........0M
^^a ^b ^c ^d ^e ^f ^g ^hMassarotti, Alessandro; et al. (January 2008), "Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity",The Astronomical Journal,135(1): 209–231,Bibcode:2008AJ....135..209M,doi:10.1088/0004-6256/135/1/209
^Janes, K. A. (May 1975), "Cyanogen Strengths, Luminosities, and Kinematics of K Giant Stars",Astrophysical Journal Supplement,29:161–183,Bibcode:1975ApJS...29..161J,doi:10.1086/190339.See p. 179.{{citation}}:CS1 maint: postscript (link)

External links[edit]

HR 8924Catalog
Image HD 221148

This variable star–related article is astub.You can help Wikipedia byexpanding it.

[van_Leeuwen2007-1] 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.

[MERMILLIOD-2] Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)",Catalogue of Eggen's UBV Data. SIMBAD,Bibcode:1986EgUBV........0M

[aj135_1_209-3] ^^a ^b ^c ^d ^e ^f ^g ^hMassarotti, Alessandro; et al. (January 2008), "Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity",The Astronomical Journal,135(1): 209–231,Bibcode:2008AJ....135..209M,doi:10.1088/0004-6256/135/1/209

[janes1975-4] Janes, K. A. (May 1975), "Cyanogen Strengths, Luminosities, and Kinematics of K Giant Stars",Astrophysical Journal Supplement,29:161–183,Bibcode:1975ApJS...29..161J,doi:10.1086/190339.See p. 179.{{citation}}:CS1 maint: postscript (link)

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Observation data EpochJ2000EquinoxJ2000
Constellation	Aquarius
Right ascension	23^h29^m32.08207^s^[1]
Declination	−04° 31′ 57.8915″^[1]
Apparent magnitude(V)	6.26^[2]
Characteristics
Spectral type	K3IIIv^[3]
U−Bcolor index	+1.20^[2]
B−Vcolor index	+1.10^[2]
Astrometry

Radial velocity(R_v)	−26.53±1.94^[3]km/s
Proper motion(μ)	RA:+181.03^[1]mas/yr Dec.:−232.23^[1]mas/yr
Parallax(π)	21.14 ± 0.56mas^[1]
Distance	154 ± 4ly (47 ± 1pc)

Details

Radius	5^[3]`R`_☉
Luminosity	8.9^[3]`L`_☉
Surface gravity(logg)	3.1^[3]cgs
Temperature	4,592^[3]K
Metallicity[Fe/H]	+0.11^[3]dex
Rotational velocity(vsini)	2.2^[3]km/s

Other designations
BD-05° 5999,FK53881,HD221148,HIP115953,HR8924,LTT9560,SAO146736.
Database references
SIMBAD	data