Kappa Eridani information

κ Eridani
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Eridanus
Right ascension	02h 26m 59.12177s
Declination	−47° 42′ 13.8247″
Apparent magnitude (V)	4.25
Characteristics
Spectral type	B7 IV
U−B color index	−0.50
B−V color index	−0.14
Astrometry
Radial velocity (Rv)	+25.5±0.5 km/s
Proper motion (μ)	RA: +19.32 mas/yr ; Dec.: −5.54 mas/yr
Parallax (π)	6.42 ± 0.15 mas
Distance	510 ± 10 ly ; (156 ± 4 pc)
Absolute magnitude (MV)	−1.72
Details
Mass	5.0±0.8 M☉
Radius	6 R☉
Luminosity	1,175 L☉
Surface gravity (log g)	3.5±0.1 cgs
Temperature	14,700±400 K
Metallicity [Fe/H]	0.02±0.06 dex
Rotational velocity (v sin i)	10±8 km/s
Age	93 Myr
Other designations
	κ Eri, CD-48° 637, FK5 86, HD 15371, HIP 11407, HR 721, SAO 215906.
Database references
SIMBAD	data

Kappa Eridani, Latinized from κ Eridani, is a solitary star in the constellation Eridanus. With an apparent visual magnitude of 4.25,^[2] it is bright enough to be visible to the naked eye on a dark night. Based upon an annual parallax shift of 0.00642 arc seconds,^[1] it is roughly 510 light years distant from the Sun.

This appears to be an evolving B-type subgiant star with a stellar classification of B7 IV.^[3] The measured angular diameter is 0.346±0.008 mas.^[8] At an estimated distance of Kappa Eridani, this yields a physical size of about six times the radius of the Sun.^[6] It has five times the Sun's mass, and radiates 1,175 times the solar luminosity from its outer atmosphere at an effective temperature of 14,700 K. Kappa Eridani is spinning with a projected rotational velocity of 10 km/s and is around 93 million years old.^[3]

^ ^a ^b ^c ^d ^e ^f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference Levenhagen2006 was invoked but never defined (see the help page).
^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference lang2006 was invoked but never defined (see the help page).
^ Cite error: The named reference cadars was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Niemczura2003 was invoked but never defined (see the help page).
^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).

[vanLeeuwen2007-1] ^ ^a ^b ^c ^d ^e ^f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).

[Johnson1966-2] Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).

[Levenhagen2006-3] Cite error: The named reference Levenhagen2006 was invoked but never defined (see the help page).

[deBruijne2012-4] Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).

[Anderson2012-5] Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).

[lang2006-6] Cite error: The named reference lang2006 was invoked but never defined (see the help page).

[cadars-7] Cite error: The named reference cadars was invoked but never defined (see the help page).

[Niemczura2003-8] Cite error: The named reference Niemczura2003 was invoked but never defined (see the help page).

[SIMBAD-9] Cite error: The named reference SIMBAD was invoked but never defined (see the help page).

Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Eridanus
Right ascension	02^h 26^m 59.12177^s^[1]
Declination	−47° 42′ 13.8247″^[1]
Apparent magnitude (V)	4.25^[2]
Characteristics
Spectral type	B7 IV^[3]
U−B color index	−0.50^[2]
B−V color index	−0.14^[2]
Astrometry

Radial velocity (R_v)	+25.5±0.5^[4] km/s
Proper motion (μ)	RA: +19.32^[1] mas/yr Dec.: −5.54^[1] mas/yr
Parallax (π)	6.42 ± 0.15 mas^[1]
Distance	510 ± 10 ly (156 ± 4 pc)
Absolute magnitude (M_V)	−1.72^[5]

Details^[3]

Mass	5.0±0.8 `M`_☉
Radius	6^[6]^[7] `R`_☉
Luminosity	1,175 `L`_☉
Surface gravity (log g)	3.5±0.1 cgs
Temperature	14,700±400 K
Metallicity [Fe/H]	0.02±0.06^[8] dex
Rotational velocity (v sin i)	10±8 km/s
Age	93 Myr

Other designations
κ Eri, CD-48° 637, FK5 86, HD 15371, HIP 11407, HR 721, SAO 215906.^[9]
Database references
SIMBAD	data

Kappa Eridani information

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