Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Chamaeleon |
Right ascension | 08h 18m 31.55319s [1] |
Declination | −76° 55′ 10.9964″ [1] |
Apparent magnitude (V) | 4.06 [2] |
Characteristics | |
Spectral type | F5 V Fe-0.8 [3] |
U−B color index | −0.04 [2] |
B−V color index | +0.40 [2] |
Astrometry | |
Radial velocity (Rv) | −13.4±0.5 [4] km/s |
Proper motion (μ) |
RA: 111.12
[1]
mas/
yr Dec.: 107.49 [1] mas/ yr |
Parallax (π) | 51.12 ± 0.12 mas [1] |
Distance | 63.8 ± 0.1
ly (19.56 ± 0.05 pc) |
Absolute magnitude (MV) | +2.59 [5] |
Details | |
Mass | 1.42 [6] M☉ |
Radius | 2.11+0.14 −0.05 [7] R☉ |
Luminosity | 7.542±0.062 [7] L☉ |
Surface gravity (log g) | 4.28±0.14 [6] cgs |
Temperature | 6,580+91 −209 [7] K |
Metallicity [Fe/H] | −0.26 [3] dex |
Rotational velocity (v sin i) | 0 [8] km/s |
Age | 1.8 [6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Alpha Chamaeleontis, Latinized from α Chamaeleontis, is a solitary [10] star in the southern circumpolar constellation of Chamaeleon. It has an apparent visual magnitude of 4.06 [2] and thus is bright enough to be seen with the naked eye. With an annual parallax shift of 51.12 mas, [1] it is located 63.8 light years from the Sun. The star is drifting closer with a radial velocity of −13 km/s, [4] and is predicted to come to within 47 light-years in 666,000 years. [5]
This is an F-type main sequence star with a stellar classification of F5 V Fe−0.8, [3] where the 'Fe−0.8' notation indicates an anomalously low abundance of iron. It has an estimated 1.4 times the mass of the Sun, [6] 2.1 times the Sun's radius, [7] and radiates 7.5 times the solar luminosity from its outer atmosphere at an effective temperature of 6,580 K. [7] The star is around 1.8 [6] billion years old with a projected rotational velocity that is too low to be measured. [8] The star has been examined for an infrared excess that would suggest the presence of an orbiting debris disk, but none was found. [11]
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Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Chamaeleon |
Right ascension | 08h 18m 31.55319s [1] |
Declination | −76° 55′ 10.9964″ [1] |
Apparent magnitude (V) | 4.06 [2] |
Characteristics | |
Spectral type | F5 V Fe-0.8 [3] |
U−B color index | −0.04 [2] |
B−V color index | +0.40 [2] |
Astrometry | |
Radial velocity (Rv) | −13.4±0.5 [4] km/s |
Proper motion (μ) |
RA: 111.12
[1]
mas/
yr Dec.: 107.49 [1] mas/ yr |
Parallax (π) | 51.12 ± 0.12 mas [1] |
Distance | 63.8 ± 0.1
ly (19.56 ± 0.05 pc) |
Absolute magnitude (MV) | +2.59 [5] |
Details | |
Mass | 1.42 [6] M☉ |
Radius | 2.11+0.14 −0.05 [7] R☉ |
Luminosity | 7.542±0.062 [7] L☉ |
Surface gravity (log g) | 4.28±0.14 [6] cgs |
Temperature | 6,580+91 −209 [7] K |
Metallicity [Fe/H] | −0.26 [3] dex |
Rotational velocity (v sin i) | 0 [8] km/s |
Age | 1.8 [6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Alpha Chamaeleontis, Latinized from α Chamaeleontis, is a solitary [10] star in the southern circumpolar constellation of Chamaeleon. It has an apparent visual magnitude of 4.06 [2] and thus is bright enough to be seen with the naked eye. With an annual parallax shift of 51.12 mas, [1] it is located 63.8 light years from the Sun. The star is drifting closer with a radial velocity of −13 km/s, [4] and is predicted to come to within 47 light-years in 666,000 years. [5]
This is an F-type main sequence star with a stellar classification of F5 V Fe−0.8, [3] where the 'Fe−0.8' notation indicates an anomalously low abundance of iron. It has an estimated 1.4 times the mass of the Sun, [6] 2.1 times the Sun's radius, [7] and radiates 7.5 times the solar luminosity from its outer atmosphere at an effective temperature of 6,580 K. [7] The star is around 1.8 [6] billion years old with a projected rotational velocity that is too low to be measured. [8] The star has been examined for an infrared excess that would suggest the presence of an orbiting debris disk, but none was found. [11]
{{
cite web}}
: CS1 maint: postscript (
link)