Dubious and Disproven Candidates
This list includes disproven planets: objects which are no longer thought to be planetary, or no longer thought to exist at all, and objects which are detections which are suspected to be non-planetary in nature, for example radial velocity variations which may be caused by stellar variations. This list also contains planets which cannot be confirmed, for example planets detected in microlensing events which have low observational coverage.
| Star | Constellation | Right ascension |
Declination | Distance |
Planet | Discovery year |
Detection method |
Ref | Notes |
|---|---|---|---|---|---|---|---|---|---|
| WASP-9 | 483 | b | 2008 | Transit | Discovery retracted: blended eclipsing binary in hierarchical triple. | ||||
| HD 11964 | Cetus | 01h 57m 09s | −10° 14′ 32″ | 110.8 | d | 2007 | Radial velocity | Not detected in re-reduced data. Detection possibly an effect of Earth's orbital motion. | |
| TMR-1 | Taurus | 04h 39m 14s | +25° 53′ 21″ | 460 | C | 1998 | Imaging | Background star. | |
| HD 33636 | Orion | 05h 11m 46s | +04° 24′ 13″ | 91.6 | b | 2002 | Radial velocity | Companion is a red dwarf star in a low-inclination orbit. | |
| TW Hydrae | Hydra | 11h 01m 52s | −34° 42′ 17″ | 180 | b | 2007 | Radial velocity | Radial velocity variations caused by stellar spots. | |
| ChaHa8 | Chamaeleon | 11h 07m 48s | -77° 40′ 08″ | 160 pc | b | 2007 | Radial velocity | New velocity measurements in 2010 bring the mass above the planetary mass limit (30 to 59 MJ) | |
| Gliese 436 | Leo | 11h 42m 11s | +26° 42′ 23″ | 33.48 | c | 2008 | Transit variations | Retracted by authors. Alternate solutions are still possible. | |
| QS Virginis | Virgo | 13h 49m 52s | –13° 13′ 38″ | 156.48 | b | 2009 | Eclipsing binary minima | Subsequent timings showed that patterns were not predicted by planetary models. The best fit model for an orbit would have mass 50 MJup (0.05 M☉) in an eccentric, 14-year orbit. | |
| 1SWASP-J161732.90+242119.0 | Hercules | 16h 17m 33s | +24° 21′ 19″ | b | 2007 | Transits | No radial velocity variations: planet hypothesis ruled out. | ||
| HD 150706 | Ursa Minor | 16h 31m 18s | +79° 47′ 23″ | 88.8 | b | 2002 | Radial velocity | Not detected in independent measurements. | |
| MACHO-1997-BLG-41 (lens) | Sagittarius | 17h 56m 21s | –28° 47′ 42″ | ~10000 | 1999 | Microlensing | Detection explained by orbital motion of binary star in lens system. | ||
| Barnard's Star | Ophiuchus | 17h 57m 48s | +04° 41′ 36″ | 5.98 | various | 1963 | Astrometry | Failed independent confirmation. Artifact of telescope maintenance procedures. | |
| PSR B1829−10 | Scutum | 18h 32m 40s | –10° 21′ 33″ | 30000 | 1991 | Pulsar timing | Error in correcting for Earth's orbital motion. | ||
| HD 188753 A | Cygnus | 19h 54m 58s | +41° 52′ 18″ | 149 | b | 2005 | Radial velocity | Planet not detected in follow-up; original data do not support planet hypothesis. | |
| HD 208487 | Grus | 21h 57m 20s | −37° 45′ 49″ | 144 | c | 2005 | Radial velocity | Radial velocity variations probably caused by stellar activity. | |
| Fomalhaut | Piscis Austrinus | 22h 57m 39s | −29° 37′ 20″ | 25 | b | 2008 | Direct imaging | Infrared observations from Spitzer suggest that it is likely a spherical dust cloud instead of a planet. | |
| HD 219542 B | Pisces | 23h 16m 35s | −01° 35′ 07″ | 178 | b | 2003 | Radial velocity | Radial velocity variations caused by stellar activity. |
- This list is incomplete; you can help by expanding it.
Read more about this topic: List Of Unconfirmed Extrasolar Planets
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