HD 108236
Coordinates: 
12h 26m 17.8916s, −51° 21′ 46.2141″
12h 26m 17.8916s, −51° 21′ 46.2141″| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 12h 26m 17.8916s[1] |
| Declination | −51° 21′ 46.2141″[1] |
| Apparent magnitude (V) | 9.24 |
| Characteristics | |
| Evolutionary stage | main-sequence star
|
| Spectral type | G5V |
| Details Gyr | |
| Database references | |
| SIMBAD | data |
HD 108236 is a G-type main-sequence star. Its surface temperature is 5660±61 K. HD 108236 is severely depleted in heavy elements compared to the Sun, with a metallicity Fe/H index of −0.28±0.04 (52% of the Solar System), and is probably older than the Sun at an age of 6.7+3.3
−3.4 billion years.[3]
According to WISE mission data, the star was suspected to be surrounded by a debris disk, but a reanalysis of the data rejected the debris disk hypothesis by 2014.[4] The reason for the false positive was contamination from a nearby infrared source.[5]
Planetary system
In 2020, four planets orbiting HD 108236 were discoveredtransit method, followed by another one in 2021.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
b
|
4.23+0.41 −0.39 M🜨 |
0.0451±0.0004 | 3.7958785+0.0000076 −0.0000070 |
0.067+0.025 −0.026 |
88.23±0.32° | 1.587±0.028 R🜨 |
c
|
8.90+0.67 −0.64 M🜨 |
0.0626±0.0006 | 6.2036717+0.0000092 −0.0000100 |
0.091+0.021 −0.033 |
88.8±0.2° | 2.122±0.025 R🜨 |
d
|
7.75+0.91 −0.62 M🜨 |
0.1087±0.0010 | 14.175818+0.000024 −0.000023 |
0.075+0.021 −0.022 |
88.8±0.1° | 2.629±0.031 R🜨 |
e
|
8.2+3.8 −1.2 M🜨 |
0.1348±0.0012 | 19.5901277±0.000030 | 0.073+0.014 −0.017 |
89.3±0.1° | 3.008±0.032 R🜨 |
f
|
3.95+0.46 −0.32 M🜨 |
0.1773±0.0016 | 29.53935+0.00012 −0.00014 |
0.024+0.024 −0.016 |
89.07±0.03° | 1.89±0.04 R🜨 |
See also
- List of exoplanets discovered in 2020 - HD 108236 b through e
- List of exoplanets discovered in 2021 - HD 108236 f
References
