Nu Ceti information

Nu Ceti
	Location of ν Ceti (circled)
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Cetus
Right ascension	02h 35m 52.473s
Declination	+05° 35′ 35.69″
Apparent magnitude (V)	4.86 + 9.08 (visual companion)
Characteristics
Spectral type	G8III + F7V (visual companion)
U−B color index	0.52
B−V color index	0.88
Astrometry
Radial velocity (Rv)	4.81±0.02 km/s
Proper motion (μ)	RA: −26.51±0.25 mas/yr ; Dec.: −22.32±0.22 mas/yr
Parallax (π)	9.59 ± 0.23 mas
Distance	340 ± 8 ly ; (104 ± 3 pc)
Absolute magnitude (MV)	−0.415
Orbit
Primary	ν Ceti A
Period (P)	714.48±0.15 days
Eccentricity (e)	0.274±0.005
Periastron epoch (T)	53364.9±1.9
Argument of periastron (ω); (secondary)	119.5±1.1°
Semi-amplitude (K1); (primary)	5.09±0.03 km/s
Details
Aa
Mass	2.65 M☉
Radius	15.87+1.06; −2.19 R☉
Luminosity	161.4±7.9 L☉
Surface gravity (log g)	2.56 cgs
Temperature	5,164+417; −164 K
Age	537 Myr
Other designations
	Struve 281, 78 Ceti, BD+04°418, HD 16161, HIP 12093, HR 754, SAO 110635, WDS J02359+0536
Database references
SIMBAD	data

ν Ceti, Latinized as Nu Ceti, is a binary star^[5] system in the equatorial constellation of Cetus. It is visible to the naked eye as a faint point of light with a combined apparent visual magnitude of 4.86.^[2] The system is located approximately 340 light years distant from the Sun, based on parallax, and is drifting further away with a radial velocity of 4.8 km/s.^[5] Nu Ceti is believed to be part of the Ursa Major stream of co-moving stars.^[10]

In Chinese, 天囷 (Tiān Qūn), meaning Circular Celestial Granary, refers to an asterism consisting of α Ceti, κ¹ Ceti, λ Ceti, μ Ceti, ξ¹ Ceti, ξ² Ceti, ν Ceti, γ Ceti, δ Ceti, 75 Ceti, 70 Ceti, 63 Ceti and 66 Ceti. Consequently, the Chinese name for ν Ceti itself is "the Seventh Star of Circular Celestial Granary", Tiān Qūn Qī.^[11]

The primary, designated component A, forms a single-lined spectroscopic binary with an orbital period of 1.96 years and an eccentricity of 0.27.^[5] The visible component is a G-type giant star, currently on the horizontal branch,^[7] with a stellar classification of G8III.^[4] In addition to the spectroscopic companion there is a visual companion star which shares a common proper motion with Nu Ceti A, designated component B; an F-type main-sequence star with a class of F7V^[4] and a 9.08 apparent visual magnitude located 8.0 arcsec away. It was discovered by Struve.^[5]^[3]

^ ^a ^b ^c ^d ^e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference Cousins1963 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Lutz1977 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference Stephenson1969 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d ^e ^f Cite error: The named reference Griffin2015 was invoked but never defined (see the help page).
^ Cite error: The named reference data was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference Stock2018 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
^ Cite error: The named reference Levato1978 was invoked but never defined (see the help page).
^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 11 日

[van_Leeuwen2007-1] Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).

[Cousins1963-2] Cite error: The named reference Cousins1963 was invoked but never defined (see the help page).

[Lutz1977-3] Cite error: The named reference Lutz1977 was invoked but never defined (see the help page).

[Stephenson1969-4] Cite error: The named reference Stephenson1969 was invoked but never defined (see the help page).

[Griffin2015-5] ^ ^a ^b ^c ^d ^e ^f Cite error: The named reference Griffin2015 was invoked but never defined (see the help page).

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

[Stock2018-7] Cite error: The named reference Stock2018 was invoked but never defined (see the help page).

[GaiaDR2-8] Cite error: The named reference GaiaDR2 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).

[Levato1978-10] Cite error: The named reference Levato1978 was invoked but never defined (see the help page).

[11] (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 11 日

Observation data Epoch J2000.0 Equinox J2000.0
Location of ν Ceti (circled)
Constellation	Cetus
Right ascension	02^h 35^m 52.473^s^[1]
Declination	+05° 35′ 35.69″^[1]
Apparent magnitude (V)	4.86^[2] + 9.08^[3] (visual companion)
Characteristics
Spectral type	G8III + F7V (visual companion)^[4]
U−B color index	0.52^[2]
B−V color index	0.88^[2]
Astrometry

Radial velocity (R_v)	4.81±0.02^[5] km/s
Proper motion (μ)	RA: −26.51±0.25^[1] mas/yr Dec.: −22.32±0.22^[1] mas/yr
Parallax (π)	9.59 ± 0.23 mas^[1]
Distance	340 ± 8 ly (104 ± 3 pc)
Absolute magnitude (M_V)	−0.415^[6]

Orbit^[5]
Primary	ν Ceti A
Period (P)	714.48±0.15 days
Eccentricity (e)	0.274±0.005
Periastron epoch (T)	53364.9±1.9
Argument of periastron (ω) (secondary)	119.5±1.1°
Semi-amplitude (K₁) (primary)	5.09±0.03 km/s
Details
Aa
Mass	2.65^[7] `M`_☉
Radius	15.87+1.06 −2.19^[8] `R`_☉
Luminosity	161.4±7.9^[8] `L`_☉
Surface gravity (log g)	2.56^[7] cgs
Temperature	5,164+417 −164^[8] K
Age	537^[7] Myr

Other designations
Struve 281, 78 Ceti, BD+04°418, HD 16161, HIP 12093, HR 754, SAO 110635, WDS J02359+0536^[9]
Database references
SIMBAD	data

Nu Ceti information

and 24 Related for: Nu Ceti information

Nu Ceti

Gamma Ceti

Cetus

Nu Piscium

List of ZX Spectrum games

Bayer designation

Omicron

List of brightest natural objects in the sky

Corona Borealis

Solar analog

Sperm whale

6 Hebe

Hafgufa

List of exoplanet extremes

Morphological classification of Czech verbs

List of Arabic star names

List of nearest giant stars

Telugu grammar

Katy Garbi

List of Chinese star names

List of virus species

List of Belgian football transfers summer 2023

List of exoplanets discovered in 2012

2012 in science