Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Chamaeleon |
Right ascension | 11h 07m 20.72163s [1] |
Declination | −77° 38′ 07.2903″ [1] |
Apparent magnitude (V) | 10.655 [2] |
Characteristics | |
Spectral type | G0e [3] |
U−B color index | +0.630 [2] |
B−V color index | +1.144 [2] |
Variable type | T Tau [4] |
Astrometry | |
Proper motion (μ) |
RA: −24.61
[1]
mas/
yr Dec.: 3.45 [1] mas/ yr |
Parallax (π) | 4.49 ± 1.59 mas [1] |
Distance | approx. 700
ly (approx. 220 pc) |
Details [5] | |
Aa | |
Mass | 1.7 M☉ |
Radius | 2.00 R☉ |
Luminosity | 4.7 L☉ |
Temperature | 6,030 K |
Age | 7.1 Myr |
Ba/Bb | |
Mass | 0.18 M☉ |
Radius | 1.13 R☉ |
Luminosity | 0.11 L☉ |
Temperature | 3,130 K |
Age | 3.0 Myr |
Other designations | |
Database references | |
SIMBAD | data |
DI Chamaeleontis, also known as Hen 3-593 or HIP 54365, is a quadruple star system in the constellation Chamaeleon. The system is roughly 700 light years from Earth.
DI Cha is a variable star of the T Tauri type, young stellar objects just approaching the main sequence. It varies erratically between visual magnitudes 10.65 and 10.74. [4] Although it is visually faint, it was noticed because of the prominent emission lines in its spectrum. [6]
In 1977, DI Cha was observed to have a much fainter companion. [7] The separation was later measured at 4.6", approximately 644 astronomical units (AU). [8] The B component was discovered to be a pair of stars separated by only 0.066", about 10 AU, [9] both with spectral type M5.5. [10] Finally, the variable primary star was found to have a faint companion 0.2" (therefore ~30 AU) away, of spectral type M6. [10]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Chamaeleon |
Right ascension | 11h 07m 20.72163s [1] |
Declination | −77° 38′ 07.2903″ [1] |
Apparent magnitude (V) | 10.655 [2] |
Characteristics | |
Spectral type | G0e [3] |
U−B color index | +0.630 [2] |
B−V color index | +1.144 [2] |
Variable type | T Tau [4] |
Astrometry | |
Proper motion (μ) |
RA: −24.61
[1]
mas/
yr Dec.: 3.45 [1] mas/ yr |
Parallax (π) | 4.49 ± 1.59 mas [1] |
Distance | approx. 700
ly (approx. 220 pc) |
Details [5] | |
Aa | |
Mass | 1.7 M☉ |
Radius | 2.00 R☉ |
Luminosity | 4.7 L☉ |
Temperature | 6,030 K |
Age | 7.1 Myr |
Ba/Bb | |
Mass | 0.18 M☉ |
Radius | 1.13 R☉ |
Luminosity | 0.11 L☉ |
Temperature | 3,130 K |
Age | 3.0 Myr |
Other designations | |
Database references | |
SIMBAD | data |
DI Chamaeleontis, also known as Hen 3-593 or HIP 54365, is a quadruple star system in the constellation Chamaeleon. The system is roughly 700 light years from Earth.
DI Cha is a variable star of the T Tauri type, young stellar objects just approaching the main sequence. It varies erratically between visual magnitudes 10.65 and 10.74. [4] Although it is visually faint, it was noticed because of the prominent emission lines in its spectrum. [6]
In 1977, DI Cha was observed to have a much fainter companion. [7] The separation was later measured at 4.6", approximately 644 astronomical units (AU). [8] The B component was discovered to be a pair of stars separated by only 0.066", about 10 AU, [9] both with spectral type M5.5. [10] Finally, the variable primary star was found to have a faint companion 0.2" (therefore ~30 AU) away, of spectral type M6. [10]