HR 968

HR 968
	Location of HR 968 (circled in red)
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Eridanus
Right ascension	03h 12m 25.75s
Declination	−44° 25′ 10.8″
Apparent magnitude (V)	5.93
Characteristics
Spectral type	F7III+A0V
B−V color index	+0.44
Astrometry
Proper motion (μ)	RA: +81.63 mas/yr ; Dec.: −4.57 mas/yr
Parallax (π)	23.53±0.62 mas
Distance	139 ± 4 ly ; (42 ± 1 pc)
Absolute magnitude (MV)	+2.78
Orbit
Period (P)	44.93 yr
Semi-major axis (a)	0.399″
Eccentricity (e)	0.891
Inclination (i)	180°
Details
A
Mass	1.34 M☉
B
Mass	1.24 M☉
C
Mass	0.87 M☉
Other designations
	CD−44°1025, HD 20121, HR 968, SAO 216209
Database references
SIMBAD	data
	A
	B
	C

HR 968 (HD 20121) is a triple star in the Eridanus constellation with an apparent magnitude of 5.93. A close pair, a magnitude 6.6 F-type star and a magnitude 6.9 A-type star, are accompanied by a fainter common proper motion companion 3.6″ away.^[4] The three combined are barely visible to the naked eye.^[3] It had the Bayer designation u Eridani by Nicolas Louis de Lacaille before Francis Baily dropped the title.^[6]

Right ascension03^h 12^m 25.75^s^[2]

Declination−44° 25′ 10.8″^[2]

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Observation data Epoch J2000.0 Equinox J2000.0
Location of HR 968 (circled in red)
Constellation	Eridanus^[1]
Right ascension	03^h 12^m 25.75^s^[2]
Declination	−44° 25′ 10.8″^[2]
Apparent magnitude (V)	5.93^[3]
Characteristics
Spectral type	F7III+A0V^[3]
B−V color index	+0.44^[3]
Astrometry

Proper motion (μ)	RA: +81.63^[2] mas/yr Dec.: −4.57^[2] mas/yr
Parallax (π)	23.53±0.62 mas^[2]
Distance	139 ± 4 ly (42 ± 1 pc)
Absolute magnitude (M_V)	+2.78^[1]

Orbit^[4]
Period (P)	44.93 yr
Semi-major axis (a)	0.399″
Eccentricity (e)	0.891
Inclination (i)	180°
Details^[4]
A
Mass	1.34 `M`_☉
B
Mass	1.24 `M`_☉
C
Mass	0.87 `M`_☉

Other designations
CD−44°1025, HD 20121, HR 968, SAO 216209^[5]
Database references
SIMBAD	data
	A
	B
	C

References