Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Chamaeleon |
Right ascension | 11h 06m 28.7626s [1] |
Declination | −77° 37′ 33.1444″ [1] |
Characteristics | |
Spectral type | M3 [2] |
Astrometry | |
Proper motion (μ) |
RA: −22.193±0.233
[1]
mas/
yr Dec.: 0.215±0.206 [1] mas/ yr |
Parallax (π) | 5.2343 ± 0.1759 mas [1] |
Distance | 620 ± 20
ly (191 ± 6 pc) |
Details [3] | |
Mass | 0.32 ± 0.11 M☉ |
Radius | 0.83 ± 0.04 R☉ |
Luminosity | 0.09 ± 0.07 L☉ |
Temperature | 3490 ± 180 K |
Age | 2±1 [4] Myr |
Other designations | |
Database references | |
SIMBAD | data |
CHXR 73 is a star in the constellation Chamaeleon, about 620 light-years away from Earth. [1] [6]
The star is located within Cha I, a molecular cloud. [5] It has a low temperature of 3,490 K typical of red dwarfs, but unlike typical red dwarfs it has an unusually large radius of 0.83 R☉—this is because of its young age, only 8 million years. [3]
A companion, CHXR 73 b, has been found via direct imaging. CHXR 73 has a mass of about 12 Jupiters. [7] This is close to the upper mass limit for planets, making its classification difficult.
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 13±6 MJ | 210 | — | — | — | — |
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Chamaeleon |
Right ascension | 11h 06m 28.7626s [1] |
Declination | −77° 37′ 33.1444″ [1] |
Characteristics | |
Spectral type | M3 [2] |
Astrometry | |
Proper motion (μ) |
RA: −22.193±0.233
[1]
mas/
yr Dec.: 0.215±0.206 [1] mas/ yr |
Parallax (π) | 5.2343 ± 0.1759 mas [1] |
Distance | 620 ± 20
ly (191 ± 6 pc) |
Details [3] | |
Mass | 0.32 ± 0.11 M☉ |
Radius | 0.83 ± 0.04 R☉ |
Luminosity | 0.09 ± 0.07 L☉ |
Temperature | 3490 ± 180 K |
Age | 2±1 [4] Myr |
Other designations | |
Database references | |
SIMBAD | data |
CHXR 73 is a star in the constellation Chamaeleon, about 620 light-years away from Earth. [1] [6]
The star is located within Cha I, a molecular cloud. [5] It has a low temperature of 3,490 K typical of red dwarfs, but unlike typical red dwarfs it has an unusually large radius of 0.83 R☉—this is because of its young age, only 8 million years. [3]
A companion, CHXR 73 b, has been found via direct imaging. CHXR 73 has a mass of about 12 Jupiters. [7] This is close to the upper mass limit for planets, making its classification difficult.
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 13±6 MJ | 210 | — | — | — | — |