Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Dorado |
Right ascension | 05h 13m 45.45627s [1] |
Declination | −67° 11′ 06.9351″ [1] |
Apparent magnitude (V) | +4.82 [2] |
Characteristics | |
Spectral type | K2/3 III CNIb/II [3] |
U−B color index | +1.38 [2] |
B−V color index | +1.28 [2] |
Astrometry | |
Radial velocity (Rv) | +10.5±0.8 [4] km/s |
Proper motion (μ) |
RA: +18.280
[1]
mas/
yr Dec.: +38.470 [1] mas/ yr |
Parallax (π) | 6.6059 ± 0.1344 mas [1] |
Distance | 490 ± 10
ly (151 ± 3 pc) |
Absolute magnitude (MV) | −0.56 [5] |
Details | |
Mass | 2.23 [6] M☉ |
Radius | 16 [7] R☉ |
Luminosity | 426.6 [6] L☉ |
Surface gravity (log g) | 2.5 [8] cgs |
Temperature | 4,320±59 [6] K |
Metallicity [Fe/H] | −0.16 [5] dex |
Age | 1.17 [6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Theta Doradus, Latinized from θ Doradus, is a solitary [10] star in the southern constellation of Dorado. Based upon an annual parallax shift of 6.64 mas as seen from Earth, it is located around 490 light years from the Sun. With an apparent visual magnitude of +4.82, [2] the star is bright enough to be faintly visible to the naked eye.
This is an evolved orange-hued K-type giant star with a stellar classification of K2/3 III CNIb/II, [3] where the suffix indicates it is a chemically peculiar star with a strong CN band. [11] With an age of around 1.17 billion years, [6] it has an estimated 2.23 [6] times the mass of the Sun and has expanded to about 16 [7] times the Sun's radius. It is radiating 426.6 times the solar luminosity from its photosphere at an effective temperature of 4,320 K. [6]
In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, 夾白 (Jiá Bái), meaning White Patches Attached, refers to an asterism consisting of θ Doradus and α Reticuli. Consequently, θ Doradus itself is known as 夾白一 (Jiá Bái yī, English: the First Star of White Patches Attached.) [12]
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cite web}}
: CS1 maint: postscript (
link)
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Dorado |
Right ascension | 05h 13m 45.45627s [1] |
Declination | −67° 11′ 06.9351″ [1] |
Apparent magnitude (V) | +4.82 [2] |
Characteristics | |
Spectral type | K2/3 III CNIb/II [3] |
U−B color index | +1.38 [2] |
B−V color index | +1.28 [2] |
Astrometry | |
Radial velocity (Rv) | +10.5±0.8 [4] km/s |
Proper motion (μ) |
RA: +18.280
[1]
mas/
yr Dec.: +38.470 [1] mas/ yr |
Parallax (π) | 6.6059 ± 0.1344 mas [1] |
Distance | 490 ± 10
ly (151 ± 3 pc) |
Absolute magnitude (MV) | −0.56 [5] |
Details | |
Mass | 2.23 [6] M☉ |
Radius | 16 [7] R☉ |
Luminosity | 426.6 [6] L☉ |
Surface gravity (log g) | 2.5 [8] cgs |
Temperature | 4,320±59 [6] K |
Metallicity [Fe/H] | −0.16 [5] dex |
Age | 1.17 [6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Theta Doradus, Latinized from θ Doradus, is a solitary [10] star in the southern constellation of Dorado. Based upon an annual parallax shift of 6.64 mas as seen from Earth, it is located around 490 light years from the Sun. With an apparent visual magnitude of +4.82, [2] the star is bright enough to be faintly visible to the naked eye.
This is an evolved orange-hued K-type giant star with a stellar classification of K2/3 III CNIb/II, [3] where the suffix indicates it is a chemically peculiar star with a strong CN band. [11] With an age of around 1.17 billion years, [6] it has an estimated 2.23 [6] times the mass of the Sun and has expanded to about 16 [7] times the Sun's radius. It is radiating 426.6 times the solar luminosity from its photosphere at an effective temperature of 4,320 K. [6]
In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, 夾白 (Jiá Bái), meaning White Patches Attached, refers to an asterism consisting of θ Doradus and α Reticuli. Consequently, θ Doradus itself is known as 夾白一 (Jiá Bái yī, English: the First Star of White Patches Attached.) [12]
{{
cite web}}
: CS1 maint: postscript (
link)