HD 192263 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 192263 | |
| Constellation | Aquila | |
| Right ascension | (α) | 20h 13m 59.8451s |
| Declination | (δ) | –00° 52′ 00.757″ |
| Distance | 64.88 ly (19.89 pc) | |
| Spectral type | K2V | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.15 AU |
| Eccentricity | (e) | 0 |
| Orbital period | (P) | 24.348 ± 0.005 d (0.066661 y) |
| Orbital speed | (υ) | 67.2 km/s |
| Argument of periastron |
(ω) | 0° |
| Time of periastron | (T0) | 2,451,979.28 ± 0.08 JD |
| Semi-amplitude | (K) | 51.9 ± 2.6 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 0.75 MJ |
| Discovery information | ||
| Discovery date | September 28th, 1999 | |
| Discoverer(s) | Santos, Mayor, Naef et al.[1] | |
| Discovery method | Doppler Spectroscopy (CORALIE) | |
| Discovery site | La Silla Observatory | |
| Discovery status | Published[1] | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 192263 b is a gas giant planet with a mass about three quarters that of Jupiter mass. It orbits the star in a circular orbit completing one revolution in 24 days or so. It was discovered in 2000 by the Geneva Extrasolar Planet Search team.[1]
In 2002 the existence of the planet was questioned by G. Henry: The star was observed to have photometric brightness variations that have same period and velocities as the planet. The signal could come from those variations instead of the planet orbiting the star or suggests that rotational modulation of the visibility of stellar surface activity is the source of the observed radial velocity variations.[2] Finally, in 2003 the planet was confirmed; the planet is thought to be causing fluctuations in the system's magnetic field, causing visible activity.[3]
Preliminary astrometry in 2001 set its inclination at 179.5°;[4] but it is now thought to be inclined according to the star's ecliptic, edge-on to Earth.
References
- 1 2 3 Santos, N. C.; et al. (2000). "The CORALIE survey for Southern extra-solar planets III. A giant planet in orbit around HD 192263". Astronomy and Astrophysics. 356: 599–602. Bibcode:2000A&A...356..599S.
- ↑ See, "No Planet at All: Star Fools Astronomers, Who See Spots". Space.com article. External link in
|work=(help) - ↑ Santos, N. C.; et al. (2003). "The CORALIE survey for southern extra-solar planets XI. The return of the giant planet orbiting HD 192263". Astronomy and Astrophysics. 406 (1): 373–381. Bibcode:2003A&A...406..373S. arXiv:astro-ph/0305434
. doi:10.1051/0004-6361:20030776. - ↑ Han; Black, David C.; Gatewood, George (2001). "Preliminary Astrometric Masses for Proposed Extrasolar Planetary Companions". The Astrophysical Journal Letters. 548 (1): L57–L60. Bibcode:2001ApJ...548L..57H. doi:10.1086/318927.
- Vogt; Marcy, Geoffrey W.; Butler, R. Paul; Apps, Kevin (2000). "Six New Planets from the Keck Precision Velocity Survey". The Astrophysical Journal. 536 (2): 902–914. Bibcode:2000ApJ...536..902V. arXiv:astro-ph/9911506 . doi:10.1086/308981.
- Henry; Donahue, Robert A.; Baliunas, Sallie L. (2002). "A False Planet around HD 192263". The Astrophysical Journal Letters. 577 (2): L111–L114. Bibcode:2002ApJ...577L.111H. doi:10.1086/344291.
External links
- "HD 192263". Exoplanets.
- "A new extrasolar planet around the star HD 192263". http://obswww.unige.ch/. External link in
|work=(help) – discovery announcement - "The Controversial Planet Around HD 192263". http://exoplanets.org/. External link in
|work=(help) - "Don't Take This Extrasolar Planet Off the List Just Yet Planet Around HD 192263". Space.com article. External link in
|work=(help) - "Observatory of Geneva and Laboratoire d'Astrophysique de l'EPFL". http://obswww.unige.ch/. External link in
|work=(help) - "Simulation HD 192263b". Observatory of Paris. External link in
|work=(help)
Coordinates: 
20h 13m 59.8451s, −00° 52′ 00.757″