en 64 Ceti

64 Ceti
Observation data; Epoch J2000 Equinox J2000
Constellation	Cetus
Right ascension	02h 11m 21.079s
Declination	+08° 34′ 11.31″
Apparent magnitude (V)	5.623±0.01
Characteristics
Evolutionary stage	Subgiant
Spectral type	G0IV
Apparent magnitude (B)	6.189
Apparent magnitude (R)	6.81
Apparent magnitude (G)	5.497
Apparent magnitude (J)	4.763
Apparent magnitude (H)	4.373
Apparent magnitude (K)	4.308
B−V color index	0.52
Astrometry
Radial velocity (Rv)	-19.01±0.22 km/s
Proper motion (μ)	RA: -141.042 mas/yr ; Dec.: -113.463 mas/yr
Parallax (π)	23.7901 ± 0.066 mas
Distance	136.97 ly ; (42.016 pc)
Absolute magnitude (MV)	2.49
Details
Mass	1.53±0.04 M☉
Radius	2.56±0.56 R☉
Luminosity	8.13 L☉
Surface gravity (log g)	3.81±0.09 cgs
Temperature	6066±42 K
Metallicity [Fe/H]	0.14±0.04 dex
Rotation	15 days
Rotational velocity (v sin i)	8.96±1.52 km/s
Age	2.63 Gyr
Other designations
	64 Ceti, Gaia DR2 2521857809546128896, Gaia DR3 2521857809546128896, HD 13421, HIP 10212, HR 635, SAO 110390, PPM 145360, LSPM J0211+0834, TIC 337046898, GSC 00630-01238, IRAS 02087+0820, WISE J021120.97+083410.1
Database references
SIMBAD	data

64 Ceti is a star located located in the constellation Cetus. Based on its spectral type of G0IV, it is a G-type star that has left the main sequence and evolved into a subgiant.^[1] It is located 42.02 parsecs (137.1 light-years) away, based on a parallax measured by Gaia DR3, and it is moving towards Earth at a velocity of 19 km/s.^[3] The apparent magnitude of 64 Ceti is 5.62,^[1] which makes it visible to the naked eye only in dark skies, far away from light pollution.^[4]

Characteristics

64 Ceti is a G-type star that has left the main sequence and now evolved into a subgiant, based on its spectral type of G0IV.^[1] It has about 1.53 times the Sun's mass and has expanded to 2.53 times the Sun's diameter.^[2] It is emitting 8.13 times the solar luminosity from its photosphere at an effective temperature of 6,066 K.^[2] The age of 64 Ceti is estimated at 2.63 billion years, about 58% of the Solar System's age,^[d] and it rotates under its axis at a speed of 8.96 km/s, translating into a rotation period of 15 days.^[b]^[2] The B-V index of the star is 0.52, corresponding to a yellow-white hue of a late G/early F star.^[2]^[e]

It is located in the constellation Cetus, based on its celestial coordinates. Gaia DR3 measured a parallax of 23.8 milliarcseconds for this star, translating into a distance of 42.02 parsecs (137.1 light-years).^[3] The apparent magnitude of 64 Ceti is 5.62,^[1] which means that it is a faint star, visible to the naked eye only from locations with dark skies.^[4] The absolute magnitude, i.e. its brightness if it was seen at a distance of 10 pc (32.6 ly), is 2.49.^[4] The star is moving towards Earth at a velocity of 19 km/s.^[3] It has a high proper motion across the sky^[1] and belongs to the thin disk population, being located 31.03 parsecs (101.2 ly) above the galactic plane.^[2]

Notes

^ from a logarithm of 0.91
^ ^a ^b The rotational period is calculated using the star's circumference ( $π$ *diameter (km)) and later divided by the rotational period. The value will be divided by 86400 to convert from seconds to days.
^ From a logarithm of 9.42.
^ The Solar System has an age of 4.532 billion years.
^ See the Color index article

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p "64 Ceti". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 7, 2024.
^ ^a ^b ^c ^d ^e ^f ^g Deka-Szymankiewicz, B.; Niedzielski, A.; Adamczyk, M.; Adamów, M.; Nowak, G.; Wolszczan, A. (2018-07-01). "The Penn State - Toruń Centre for Astronomy Planet Search stars. IV. Dwarfs and the complete sample". Astronomy and Astrophysics. 615: A31. arXiv:1801.02899. Bibcode:2018A&A...615A..31D. doi:10.1051/0004-6361/201731696. ISSN 0004-6361. Data about this star is available here at VizieR.
^ ^a ^b ^c ^d ^e ^f ^g Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ ^a ^b ^c ^d "64 Ceti - Star in Cetus | TheSkyLive.com". theskylive.com. Retrieved 2024-05-07.

[5] rom a logarithm of 0.91

[period-6] The rotational period is calculated using the star's circumference ( $π$ *diameter (km)) and later divided by the rotational period. The value will be divided by 86400 to convert from seconds to days.

[7] From a logarithm of 9.42.

[8] The Solar System has an age of 4.532 billion years.

[9] See the Color index article

[simbad-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p "64 Ceti". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 7, 2024.

[:0-2] ^ ^a ^b ^c ^d ^e ^f ^g Deka-Szymankiewicz, B.; Niedzielski, A.; Adamczyk, M.; Adamów, M.; Nowak, G.; Wolszczan, A. (2018-07-01). "The Penn State - Toruń Centre for Astronomy Planet Search stars. IV. Dwarfs and the complete sample". Astronomy and Astrophysics. 615: A31. arXiv:1801.02899. Bibcode:2018A&A...615A..31D. doi:10.1051/0004-6361/201731696. ISSN 0004-6361. Data about this star is available here at VizieR.

[gaia-3] ^ ^a ^b ^c ^d ^e ^f ^g Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.

[:1-4] "64 Ceti - Star in Cetus | TheSkyLive.com". theskylive.com. Retrieved 2024-05-07.

[1]

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[3]

[4]

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[e]

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64 Ceti

Characteristics

Notes

References

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