DENIS-P J082303.1-491201
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Vela |
| Right ascension | 08h 23m 03.13s |
| Declination | −49° 12′ 01.3″ |
| Characteristics | |
| Spectral type | L1.5 + L5.5 |
| Apparent magnitude (R) | 20.020 |
| Astrometry | |
| Proper motion (μ) |
RA: −154.92 mas/yr Dec.: 7.99 mas/yr |
| Distance | 67.48 ± 0.20 ly (20.69 ± 0.06pc) |
| Orbit | |
| Period (P) | 247.75 ± 0.64 d |
| Semi-major axis (a) | 4.62 ± 0.12 mas″ |
| Eccentricity (e) | 0.36 ± 0.04 |
| Inclination (i) | 52.2 ± 1.5° |
| Longitude of the node (Ω) | 346.2 ± 2.0° |
| Periastron epoch (T) | JD 2455927.323928 |
|
Argument of periastron (ω) (secondary) |
41.8 ± 4.7° |
| Details | |
| A | |
| Mass | 0.028−0.063 M☉ |
| Luminosity | 0.00018 L☉ |
| Temperature | 2150 ± 100 K |
| Age | 80–500 Myr |
| B | |
| Mass | 0.018−0.045 M☉ |
| Luminosity | 0.000063 L☉ |
| Temperature | 1670 ± 140 K |
| Other designations | |
|
2MASS J08230313-4912012
|
|
| Database references | |
| SIMBAD | data |
DENIS-P J082303.1-491201 (also known as DENIS J082303.1-491201, DE0823-49), is a binary system of two brown dwarfs, located 20.77 parsecs (67.7 ly) away from the Earth. The system is located in the constellation Vela.
The primary has a spectral class of L1.5, a mass of 0.028 to 0.063 M☉ and a temperature of 2,150 K (1,880 °C; 3,410 °F). The secondary is also a brown dwarf but with a spectral type of L5.5, a mass of 0.018 to 0.045 M☉, and a temperature of 1,670 K (1,400 °C; 2,550 °F). The mass ratio is around 0.64 to 0.74.
The system has an orbital period of 248 days. The age of the system is estimated to be around 80 to 500 millions years old, a relatively young object in the solar neighbourhood, however it does not seem to belong to have any association with any moving groups.
DENIS J082303.1-491201 was discovered by Ngoc Phan-Bao et al as part of the Deep Near Infrared Survey of the Southern Sky or DENIS for short.
Detected in 2006, DE0823-49 b was included in the NASA Exoplanet Archive as the first exoplanet discovered by the Astrometry exoplanet detection method.
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