Star in the constellation Capricornus
Zeta Capricorni
Location of ζ Capricorni (circled) |
Observation data Epoch J2000 Equinox J2000
|
Constellation
|
Capricornus
|
Right ascension
|
21h 26m 40.02634s[1]
|
Declination
|
−22° 24′ 40.8042″[1]
|
Apparent magnitude (V)
|
3.77[2]
|
Characteristics
|
Spectral type
|
G4Ib: Ba2[3] + DA2.2[4]
|
U−B color index
|
+0.57[5]
|
B−V color index
|
+0.99[5]
|
Variable type
|
Suspected eclipsing binary[6][7]
|
Astrometry |
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|
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Radial velocity (Rv) | +2.1±0.1[2] km/s |
Proper motion (μ) | RA: −2.23[1] mas/yr Dec.: 18.10[1] mas/yr |
Parallax (π) | 8.46 ± 0.21 mas[1] |
Distance | 386 ± 10 ly (118 ± 3 pc) |
Absolute magnitude (MV) | −1.59[2] |
|
Orbit[8] |
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Period (P) | 2,378.2 d |
Semi-major axis (a) | 8.56±4.3 mas 1.00+1.69 −0.44 AU |
Eccentricity (e) | 0.2821 |
Inclination (i) | 111.7±20.7° |
Longitude of the node (Ω) | 190.7±50.0° |
Periastron epoch (T) | 2,445,996 JD |
Argument of periastron (ω) (secondary) | 233.8±19.8° |
Details[9] |
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A |
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Mass | 4.5+0.3 −0.2 M☉ |
Radius | ~29[10] R☉ |
Luminosity | 561+180 −143 L☉ |
Surface gravity (log g) | 1.7±0.3 cgs |
Temperature | 5,269±53 K |
Metallicity [Fe/H] | −0.09 dex |
B |
---|
Mass | 1.03 M☉ |
Temperature | 23,000[4] K |
Other designations |
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ζ Cap, 34 Cap, NSV 25596, CD−22°15388, GC 30020, HD 204075, HIP 105881, HR 8204, SAO 190341, CCDM J21267-2225AB, WDS J21267-2225AB, WD 2123-226[11] |
Database references |
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SIMBAD | data |
Zeta Capricorni, Latinised from ζ Capricorni, is a binary star system in the southern constellation of Capricornus. It is visible to the naked eye with an apparent visual magnitude of 3.77.[2] The system is located at a distance of approximately 386 light-years from the Sun based on parallax.[1] It is drifting further away with a radial velocity of +2 km/s. The absolute magnitude of this system is −1.59.[2]
- ^ a b c d e f Cite error: The named reference
van Leeuwen2007
was invoked but never defined (see the help page).
- ^ a b c d e Cite error: The named reference
Anderson_Francis_2012
was invoked but never defined (see the help page).
- ^ Cite error: The named reference
Keenan_McNeil_1989
was invoked but never defined (see the help page).
- ^ a b Cite error: The named reference
Holberg_et_al_2013
was invoked but never defined (see the help page).
- ^ a b Cite error: The named reference
UBV
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- ^ Cite error: The named reference
Srivastava1988
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- ^ Cite error: The named reference
Samus_et_al_2017
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Pourbaix2000
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Jorissen_et_al_2019
was invoked but never defined (see the help page).
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Kaler
was invoked but never defined (see the help page).
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SIMBAD
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