Gamma1 Caeli

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Template:Short description

Template:Other stars by Bayer designation

γ1 Caeli
Template:Location mark
Location of γ1 Caeli
Observation data
Epoch J2000      Equinox J2000
Constellation Caelum
γ1 Caeli A
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) Script error: No such module "val".[2]
γ1 Caeli B
Right ascension Template:RA[3]
Declination Template:DEC[3]
Apparent magnitude (V) Script error: No such module "val".[2]
Characteristics
γ1 Caeli A
Spectral type K2III-IIIb[4]
U−B Template:Engvar 1.197[5]
B−V Template:Engvar 1.198[5]
γ1 Caeli B
Spectral type G8IV[6]
B−V Template:Engvar 0.84[2]
Astrometry
γ1 Caeli A
Radial velocity (Rv)Script error: No such module "val".[7] km/s
Proper motion (μ) RA: 125.972 mas/yr[7]
Dec.: −42.909 mas/yr[7]
Parallax (π)17.5912±0.0834 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
γ1 Caeli B
Proper motion (μ) RA: 123.107 mas/yr[3]
Dec.: −45.167 mas/yr[3]
Parallax (π)17.5332±0.024 mas[3]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Details
γ1 Caeli A
MassScript error: No such module "val".[8] Template:Solar mass
RadiusScript error: No such module "val".[7] Template:Solar radius
LuminosityScript error: No such module "val".[7] Template:Solar luminosity
TemperatureScript error: No such module "val".[7] K
Metallicity [Fe/H]−0.1[8] dex
Rotational velocity (v sin i)<1[9] km/s
γ1 Caeli B
Mass0.91[10] Template:Solar mass
Surface gravity (log g)4.45[10] cgs
Temperature5,702[10] K
Metallicity [Fe/H]−0.1[10] dex
Other designations
Template:Odlist
Database references
SIMBADThe system
A
B

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Gamma1 Caeli is a double star in the southern constellation of Caelum. Its name is a Bayer designation that is Latinized from γ1 Caeli, and abbreviated Gamma1 Cae or γ1 Cae. This pair consists of an orange hued giant and a fainter yellow subgiant star with an angular separation of Script error: No such module "val"., as of 2016.[11] The brighter component is faintly visible to the naked eye with an apparent visual magnitude of 4.57.[2] Based on parallax measurements, it is located at a distance of approximately Script error: No such module "convert". from the Earth. This star is drifting further away from the Sun with a radial velocity of +10 km/s.[7]

Properties

Gamma1 Caeli A is an evolved K-type giant star with a stellar classification of K2III-IIIb.[4] It is 40% more massive than the Sun and has expanded to 14.3 times the Sun's girth. This star is radiates 69.9 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,411 K. It is metal poor, with 79% the abundance of elements more massive than helium compared to the Sun.

Gamma1 Caeli B has an apparent magnitude of 8.07, which makes it visible only in binoculars or a telescope, and is located at a similar distance to Component A with a comparable proper motion. It has a class of G8IV,[6] matching an aging G-type subgiant star that has exhausted the supply of hydrogen at its core and is evolving away from the main sequence. This star has 91% of the Sun's mass.

References

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  1. ↑ a b c Template:Cite Gaia DR3
  2. ↑ a b c d Script error: No such module "Citation/CS1".
  3. ↑ a b c d Template:Cite Gaia DR3
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  6. ↑ a b Script error: No such module "Citation/CS1".
  7. ↑ a b c d e f Template:Cite DR2
  8. ↑ a b Script error: No such module "Citation/CS1".
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  10. ↑ a b c d Script error: No such module "Citation/CS1".
  11. ↑ Script error: No such module "Citation/CS1".

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