List of unconfirmed extrasolar planets

In addition to known extrasolar planets, there are many planet candidates whose existence is more or less uncertain, or they are now known not to exist.

Planet candidates with incomplete or poorly-constrained orbits

The following planet candidates have been detected indirectly (e.g. by the radial velocity method) but have not yet had sufficient observations to constrain their orbital properties, either because the planet has not yet completed a full orbit during the time of observation, or because the measurements are too sparse. The parameters given in this table are thus preliminary: further observations of these systems may result in significant changes.

Candidate transiting planets

There are several known stars for which potential planetary transits have been observed, however they lack enough follow-up information (such as radial velocity measurements) to rule out other hypotheses, such as the presence of a background eclipsing binary star, or a grazing transit of a larger object.

Imaged planets without confirmed association

The following planet candidates have been imaged directly but have not yet been confirmed to be physically-associated with the stars they appear to be located near.

Planets suspected from dust disk morphology

The following planets have been predicted based on the morphology of dust disks around their stars.

Stars with radial velocity trends

The following stars have long-term radial velocity trends in addition to any confirmed planets they may have. This may indicate the presence of objects (possibly planetary in nature) in long-period orbits in these systems.

Systems with possible transit variations

The following extrasolar planets have been suggested to have variations in the parameters of their transits across the face of their parent stars which may be caused by perturbations from an additional planet. Note that the planet designations listed in this table refer to the (confirmed) transiting planets: it is the additional perturbing planet that is unconfirmed. The discovery year refers to the discovery of the transit variations.

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.

See also

• List of hypothetical astronomical objects
• List of stars with proplyds

External links

• Unconfirmed, controversial or retracted planets

ko:확인되지 않은 외계 행성 목록 zh:不確定存在的太陽系外行星列表