Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Chamaeleon |
Right ascension | 09h 33m 53.37537s [1] |
Declination | −80° 56′ 28.5287″ [1] |
Apparent magnitude (V) | 5.07 [2] (5.06 - 5.17) [3] |
Characteristics | |
Spectral type | B5V [2] |
Variable type | eclipsing [4]+ ELL [5] |
Astrometry | |
Radial velocity (Rv) | −42.0±4.2 km/s |
Proper motion (μ) |
RA: −34.582
[1]
mas/
yr Dec.: +13.564 [1] mas/ yr |
Parallax (π) | 6.0043 ± 0.1134 mas [1] |
Distance | 540 ± 10
ly (167 ± 3 pc) |
Absolute magnitude (MV) | −1.15 [2] |
Details | |
Mass | 3.12 [6] M☉ |
Radius | 4.75 [7] R☉ |
Luminosity | 522 [8] L☉ |
Surface gravity (log g) | 3.55 [6] cgs |
Temperature | 15,655 [9] K |
Metallicity [Fe/H] | −0.31 [6] dex |
Rotational velocity (v sin i) | 103 [10] km/s |
Age | 184 [11] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Zeta Chamaeleontis, Latinized from ζ Chamaeleontis, is a star located in the constellation Chamaeleon. Located around 540 light-years distant, it shines with a luminosity approximately 522 times that of the Sun and has a surface temperature of 15,655 K.
South African Astronomer A.W.J. Cousins noted ζ Cha to vary between magnitudes 5.06 and 5.17 in 1960. [13] It was classified as a Beta Cephei variable in the Hipparcos and Tycho Catalogues (ESA 1997), with a period of 1.07 days, [14] before being reclassified as a slowly pulsating B star in the 2011 version. [15] It is now known to be an eclipsing binary star, with a period of 2.7 days, [4] with continuous variation through the whole cycle due to the ellipsoidal shape of the component stars. [5]
It is a B5V main sequence star with an effective temperature of 15,655 K, an absolute magnitude of −1.15 and a mass of 3.1 solar masses, although the properties are evaluated treating the system as a single star.
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Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Chamaeleon |
Right ascension | 09h 33m 53.37537s [1] |
Declination | −80° 56′ 28.5287″ [1] |
Apparent magnitude (V) | 5.07 [2] (5.06 - 5.17) [3] |
Characteristics | |
Spectral type | B5V [2] |
Variable type | eclipsing [4]+ ELL [5] |
Astrometry | |
Radial velocity (Rv) | −42.0±4.2 km/s |
Proper motion (μ) |
RA: −34.582
[1]
mas/
yr Dec.: +13.564 [1] mas/ yr |
Parallax (π) | 6.0043 ± 0.1134 mas [1] |
Distance | 540 ± 10
ly (167 ± 3 pc) |
Absolute magnitude (MV) | −1.15 [2] |
Details | |
Mass | 3.12 [6] M☉ |
Radius | 4.75 [7] R☉ |
Luminosity | 522 [8] L☉ |
Surface gravity (log g) | 3.55 [6] cgs |
Temperature | 15,655 [9] K |
Metallicity [Fe/H] | −0.31 [6] dex |
Rotational velocity (v sin i) | 103 [10] km/s |
Age | 184 [11] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Zeta Chamaeleontis, Latinized from ζ Chamaeleontis, is a star located in the constellation Chamaeleon. Located around 540 light-years distant, it shines with a luminosity approximately 522 times that of the Sun and has a surface temperature of 15,655 K.
South African Astronomer A.W.J. Cousins noted ζ Cha to vary between magnitudes 5.06 and 5.17 in 1960. [13] It was classified as a Beta Cephei variable in the Hipparcos and Tycho Catalogues (ESA 1997), with a period of 1.07 days, [14] before being reclassified as a slowly pulsating B star in the 2011 version. [15] It is now known to be an eclipsing binary star, with a period of 2.7 days, [4] with continuous variation through the whole cycle due to the ellipsoidal shape of the component stars. [5]
It is a B5V main sequence star with an effective temperature of 15,655 K, an absolute magnitude of −1.15 and a mass of 3.1 solar masses, although the properties are evaluated treating the system as a single star.
{{
cite book}}
: |journal=
ignored (
help)