64 Ceti
{{Short description|Subgiant in the constellation Cetus}}
{{Sky|02|11|21.08|+|08|34|11.31}}{{Starbox begin
|name=64 Ceti
}}
{{Starbox observe
|epoch=J2000
|equinox=J2000
|constell=Cetus
}}
{{Starbox character
|type=Subgiant
|appmag_6_passband=K
|appmag_5_passband=H
|appmag_4_passband=J
|appmag_3_passband=G
|appmag_2_passband=R
|appmag_1_passband=B
}}
{{Starbox astrometry
|prop_mo_ra=-141.042
|prop_mo_dec=-113.463
|parallax=23.7901
|dist_ly=136.97
|p_error=0.066
|dist_pc=42.016
}}
{{Starbox detail
|mass={{Val|1.53|0.04}}
|radius={{Val|2.56|0.56}}
|luminosity=8.13{{efn|from a logarithm of 0.91}}
|temperature={{Val|6066|42}}
|gravity={{Val|3.81|0.09}}
|metal_fe={{Val|0.14|0.04}}
|rotational_velocity={{Val|8.96|1.52}}
|rotation=15 days{{efn|name=period}}
|age_gyr=2.63{{Efn|From a logarithm of 9.42.}}
}}
{{Starbox catalog
|names={{Odlist|F=64 Ceti|SAO=110390|TIC=337046898|WISE=J021120.97+083410.1|Gaia DR2=2521857809546128896|Gaia DR3=2521857809546128896|HIP=10212|HD=13421|HR=635|IRAS=02087+0820|GSC=00630-01238|PPM=145360|LSPM=J0211+0834}}
}}
{{Starbox reference
|Simbad=64+Cet
}}
{{Starbox end}}
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.{{cite simbad||access-date=May 7, 2024|title=64 Ceti}} It is located {{convert|42.02|pc|ly|abbr=off|lk=in}} away, based on a parallax measured by Gaia DR3, and it is moving towards Earth at a velocity of 19{{nbsp}}km/s.{{Cite Gaia DR3|2521857809546128896}} The apparent magnitude of 64 Ceti is 5.62, which makes it visible to the naked eye only in dark skies, far away from light pollution.{{Cite web |title=64 Ceti - Star in Cetus {{!}} TheSkyLive.com |url=https://theskylive.com/sky/stars/64-ceti-star |access-date=2024-05-07 |website=theskylive.com}}
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. It has about 1.53 times the Sun's mass and has expanded to 2.53 times the Sun's diameter.{{Cite journal |last1=Deka-Szymankiewicz |first1=B. |last2=Niedzielski |first2=A. |last3=Adamczyk |first3=M. |last4=Adamów |first4=M. |last5=Nowak |first5=G. |last6=Wolszczan |first6=A. |date=2018-07-01 |title=The Penn State - Toruń Centre for Astronomy Planet Search stars. IV. Dwarfs and the complete sample |url=https://ui.adsabs.harvard.edu/abs/2018A&A...615A..31D |journal=Astronomy and Astrophysics |volume=615 |pages=A31 |doi=10.1051/0004-6361/201731696 |issn=0004-6361|arxiv=1801.02899 |bibcode=2018A&A...615A..31D }} Data about this star is available [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A+A/615/A31&recno=123 here] at VizieR. It is emitting 8.13 times the solar luminosity from its photosphere at an effective temperature of 6,066 K. The age of 64 Ceti is estimated at 2.63 billion years, about 58% of the Solar System's age,{{Efn|The Solar System has an age of 4.532 billion years.}} and it rotates under its axis at a speed of 8.96 km/s, translating into a rotation period of 15 days.{{Efn|The rotational period is calculated using the star's circumference ({{pi}}*diameter (km)) and later divided by the rotational period. The value will be divided by 86400 to convert from seconds to days.|name=period}} The B-V index of the star is 0.52, corresponding to a yellow-white hue of a late G/early F star.{{Efn|See the Color index article}}
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 {{convert|42.02|pc|ly|lk=on|abbr=off}}. The apparent magnitude of 64 Ceti is 5.62, which means that it is a faint star, visible to the naked eye only from locations with dark skies. The absolute magnitude, i.e. its brightness if it was seen at a distance of {{convert|10|pc|ly|lk=off|abbr=on|sigfig=3}}, is 2.49. The star is moving towards Earth at a velocity of 19 km/s. It has a high proper motion across the sky and belongs to the thin disk population, being located {{Convert|31.03|pc|ly}} above the galactic plane.
Notes
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