HD 154857 b
From Infogalactic: the planetary knowledge core
Exoplanet | List of exoplanets | |
---|---|---|
Parent star | ||
Star | HD 154857 | |
Constellation | Ara | |
Right ascension | (α) | 17h 11m 15.7219s |
Declination | (δ) | –56° 40′ 50.865″ |
Distance | 223.55 ly (68.54 pc) |
|
Spectral type | G5V | |
Orbital elements | ||
Semi-major axis | (a) | 1.2±0.2 AU |
Periastron | (q) | 0.64 AU |
Apastron | (Q) | 1.8 AU |
Eccentricity | (e) | 0.47±0.02 |
Orbital period | (P) | 409±1 d (1.12 y) |
Argument of periastron |
(ω) | 59±4° |
Time of periastron | (T0) | 2450346±5 JD |
Semi-amplitude | (K) | 50.4±1 m/s |
Physical characteristics | ||
Mass | (m) | >1.8±0.4 MJ (>570±100 M⊕) |
Discovery information | ||
Discovery date | 2004 | |
Discoverer(s) | McCarthy et al. AAT ![]() |
|
Discovery method | Radial velocity | |
Discovery site | AAPS | |
Discovery status | Published | |
Database references | ||
Extrasolar Planets Encyclopaedia |
data | |
SIMBAD | data | |
Exoplanet Archive | data | |
Open Exoplanet Catalogue | data |
HD 154857 b is an extrasolar planet approximately 224 light years away in the constellation of Ara. This is a gas giant mass that orbits the star in an eccentric orbit. This planet was detected by using Anglo-Australian Telescope (AAT) UCLE spectrometer.[1][2]
References
External links
- Lua error in package.lua at line 80: module 'strict' not found.
- Simulation HD 154857 b
- news.bbc.co.uk
Coordinates: 17h 11m 15.7219s, −56° 40′ 50.865″
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