HD 99109
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Leo |
| Right ascension | 11h 24m 17.359s[1] |
| Declination | –01° 31′ 44.66″[1] |
| Apparent magnitude (V) | +9.10 |
| Characteristics | |
| Spectral type | K0V |
| B−V color index | +0.87 |
| Variable type | Suspected |
| Astrometry | |
| Proper motion (μ) | RA: –178.07 ± 1.18[1] mas/yr Dec.: –159.26 ± 1.11[1] mas/yr |
| Parallax (π) | 20.03 ± 1.38[1] mas |
| Distance | 160 ± 10 ly (50 ± 3 pc) |
| Absolute magnitude (MV) | +5.19 |
| Details | |
| Mass | 0.93 M☉ |
| Luminosity | 0.724 L☉ |
| Temperature | 5272 K |
| Metallicity | 2.07 × Sun |
| Age | >12.2 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 99109 is an orange dwarf star approximately 160 light-years away[1] in the constellation of Leo. The star is thought to have about 93% as massive, probably smaller, and 72.4% the luminosity of the Sun. It is over twice the abundance of iron relative to hydrogen than the Sun. The star is one and half degree away from the celestial equator to the south. As of 2006, one extrasolar planet has been confirmed to be orbiting the star.[2]
Planetary system
The planet HD 99109 b has an orbit comparable in eccentricity to the planet Mars in the Solar System but has a mass at least half that of Jupiter. Stability analysis reveals that Earth-size planets could have stable orbits in the planet's Trojan points, located 60 degrees ahead and behind the planet's position in its orbit.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >0.502 ± 0.070 MJ | 1.105 ± 0.065 | 439.3 ± 5.6 | 0.09 ± 0.16 | — | — |
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in package.lua at line 80: module 'strict' not found.Vizier catalog entry
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.: HD 93083, HD 17051, HD 28185, HD 27442, HD 188015, HD 99109, HD 221287
External links
- Lua error in package.lua at line 80: module 'strict' not found.
Coordinates: 
11h 24m 17.358s, −01° 31′ 44.674″
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