HD 220773
HD 220773 is a 7th-magnitude star approximately 165 light years away in the constellation of Pegasus.
| Observation data Epoch 2000 Equinox 2000 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 23h 26m 27.44474s |
| Declination | +08° 38′ 37.8389″ |
| Apparent magnitude (V) | +7.10 |
| Distance | 165.9 ly (50.9 pc) |
| Spectral type | G0 |
| Other designations | |
| Database references | |
| SIMBAD | data |
The survey in 2015 have ruled out the existence of any additional stellar companions at projected distances from 31 to 337 astronomical units.[1]
Planetary system
The star is orbited by an exoplanet discovered in 2012. It is around 1.45 times the mass of Jupiter at a distance of around 5 AU and taking 10.2 years to complete an orbit.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥1.45±0.3 MJ | 4.94±0.2 | 3724.7±463 | 0.51±0.1 | — | — |
gollark: <@224013047721623554> you do need to get eggs to ND!
gollark: I've seen more golds than coppers somehow.
gollark: I bet lots of NDs will be made from siyats soon.
gollark: It doesn't really do that very well, though. People can still incubate-and-hatch for you, etc.
gollark: Only if you incubate it. The incubation reverts when it's teleported, weirdly.
References
- Mugrauer, M.; Ginski, C. (12 May 2015). "High-contrast imaging search for stellar and substellar companions of exoplanet host stars". Monthly Notices of the Royal Astronomical Society. 450 (3). doi:10.1093/mnras/stv771. Retrieved 19 June 2020.
- Robertson, Paul; Endl, Michael; Cochran, William D.; MacQueen, Phillip J.; Wittenmyer, Robert A.; Horner, J.; Brugamyer, Erik J.; Simon, Attila E.; Barnes, Stuart I.; Caldwell, Caroline (2012). "The McDonald Observatory Planet Search: New Long-period Giant Planets and Two Interacting Jupiters in the HD 155358 System". The Astrophysical Journal. 749 (1): 17 pp. arXiv:1202.0265. Bibcode:2012ApJ...749...39R. doi:10.1088/0004-637X/749/1/39.
- Planet HD 220773 b at exoplanet.eu
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