Definitions

unconfirmed

List of unconfirmed exoplanets

This is a list of unconfirmed extrasolar planets. When a planet candidate is confirmed, please remove it from this list and move it to List of stars with confirmed extrasolar planets.

For a list of unconfirmed brown dwarfs, see list of brown dwarfs.

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.

Probable extrasolar planets

There are a number of exoplanet candidates that are waiting to be confirmed.
star planet minimum mass
(× Jupiter)
orbital period
(days)
orbital distance
(× Earth)
orbital eccentricity inclination discovery year
1SWASP-J115718.66+261906.1 b 1.226804 2007
1SWASP-J130322.00+350525.4 b 2.674207 2007
1SWASP-J152131.01+213521.3 b 1.338018 2007
1SWASP-J160211.83+281010.4 b 3.941554 2007
1SWASP-J160242.43+290850.1 b 1.304693 2007
1SWASP-J161732.90+242119.0 b 1.453738 2007
23 Librae c 0.8017 9720.8792 9.21 0.4838 2006
55 Cancri g ~1130 ~2.0 2008
55 Cancri h ~23000 ~15 2008
70 Virginis c 9.58 0.088 2007
unpublished (Anon-1) 0.3 1.3381 0.024 0
Beta Pictoris 2 19 y 8
CM Draconis c 0.85 735 1
CSI +06-18266 1
Epsilon Eridani c ~0.1 ~280 y ~40 ~0.3 2002
EXP1 J1628-52c07s18161
Fomalhaut 40
GD 66 b 2.11 1650 2.356 0 2007
Gliese 317 c 0.83 2700 0.42 2007
Gliese 849 c
Gliese 86 c >1 >10 y >4 2007
GM Aurigae b 1.7 4 y 2.5
HD 111031 b 2.87 5986 0.32 2007
HD 114729 c 0.065 13.84 0.11 0.25 2005
HD 147506 c
HD 147513 c 0.115 7.89 0.08 0.3 2005
HD 154857 c 1900 0.25 2007
HD 164922 c 0.06 75.8 0.35 2007
HD 17156 c 0.063 111.314 0.481 0.136 2008
HD 183263 c 5.4550 3896.8714 5.09 0.0010 2008
HD 188015 c 0.07 8.386 0.08 0.23 2005
HD 19994 c 0.1387 35.0383 0.2318 0.0002 2006
HD 208487 d 0.12 14.5 0.11 0.43 2005
HD 216770 c 0.1886 12.456 0.102 0.3887 2006
HD 222582 c 0.0513 15.144 0.12 0.5632 2006
HD 28185 c
HD 50499 c 1.7 6.8 yr 2005
HD 50499 d 2 >10 yr 2005
OGLE-TR-111 c 0.7 16.0644 0.12
OGLE-TR-125 b
OGLE-TR-130 b
OGLE-TR-131 b
OGLE-TR-3 b 0.5 1.1899 0.025 90
Phi2 Pavonis b 0.69 42.5 0.25 0.429 1998
PSR B1828-11 b 0.002 ME 2007
SWEEPS-01 b 1.56 0.025 >86 2006
SWEEPS-02 b 0.912 0.015 >86 2006
SWEEPS-03 b 1.27 0.021 >86 2006
SWEEPS-05 b 2.313 0.03 >87 2006
SWEEPS-06 b 3.039 0.042 >86 2006
SWEEPS-07 b 1.747 0.027 >86 2006
SWEEPS-08 b 0.868 0.017 >84 2006
SWEEPS-09 b 1.617 0.025 >86 2006
SWEEPS-10 b ~1.6 0.424 0.008 >84 2006
SWEEPS-12 b 2.952 0.038 >87 2006
SWEEPS-13 b 1.684 0.027 >86 2006
SWEEPS-14 b 2.965 0.037 >87 2006
SWEEPS-15 b 0.541 0.01 >84 2006
SWEEPS-16 b 0.969 0.017 >85 2006
Tau Boötis c
UNSW-TR 3
UNSW-TR 4
W 3(OH) b 2000

Candidates that cannot be confirmed

Some potential exoplanet candidates have been detected through gravitational microlensing. Since these events are unique and the signal was not clear enough, these planets cannot be confirmed.
star planet minimum mass
(× Jupiter)
orbital period
(days)
orbital distance
(× Earth)
discovery year Notes
MACHO 94-BLG-4 b 5 1 1994
MACHO 95-BLG-3 b 2 5 1995
MACHO 98-BLG-35 b 1 ME 1998
a candidate within the elliptical galaxy YGKOW G1 3 ME 1996
GD 362 N/A N/A N/A 2007 A destroyed terrestrial planet has been proposed as the origin of an unusual stellar spectrum.

Doubtful candidates

There are many postulated exoplanets that now seem unlikely to exist.
Parent star Planet Minimum mass Orbital period
(Days)
Semimajor axis
(AU)
Eccentricity Inclination Announced
61 Cygni Aa 6
Ab 12
Ba 7
Aldebaran b ~11 653.8 ~2 0.182 1997
Barnard's Star b
c
Geminga b 1.7 ME 5.1 y 3.3 1997
Gliese 436 c 4.7 ME 5.1859 0.0450 0.2 2008
HD 3346 b 10 30 0.3
HD 44179 B b 1600
Iota Horologii c <2 600 2.1
Lalande 21185 b 286.02 2118.508 2.0 0
c 508.48 10957.8 10.0 0
OGLE-2002-BLG-055 b 5
PSR 0329+54 A 0.3 ME 3.3 y 2.3
PSR 0329+54 B 2.2 ME 16.9 y 7.3
PSR B1828-10 A 3 ME 0.68 y 0.93
B 12 ME 1.35 y 1.32
C 8 ME 2.71 y 2.1
Upsilon Andromedae e ejected ca. 3 Gyr ago
Vega b 3 30
c 0.053 56

Disproven candidates

There are several candidates that have been shown to be more massive than a planet, or not to be real at all.
star planet minimum mass
(× Jupiter)
orbital period
(days)
orbital distance
(× Earth)
orbital eccentricity inclination discovery year notes
70 Ophiuchi Ab or Bb 10 17 y 1855
Gliese 570 b 0.75 400 1
HD 188753 A b 1.14 3.3481 0.0446 0.00 2005
HD 219542 B b 0.3 112.1 0.46 0.32
HD 223084 b 1.21 104.090 0.44
HD 34445 b 0.58 126 0.51 0.4 2004
HD 83443 c 54 ME 29.83 0.174 2000
MACHO-1997-BLG-41 b 7 y 3.5
Proxima Centauri b 0.666
PSR B1257+12 D 100 ME ~100 y 40 1996
PSR 1829-10 0.5 y 1991
TMR-1 C background star

Proplyds with gaps and no known planets

When planets are confirmed, please move to the list of confirmed planets.

Many young stars are accompanied with a protoplanetary disk. Some of the disks have are known to have gaps or other structures which might have been caused by an orbiting planet.

star gap distance
(in AU)
Notes
Beta Pictoris 50 Disc is warped
Cha 110913-773444 Smallest brown dwarf
GM Aurigae 300 Disc is warped
HD 141569 86 - 350 Separates inner and outer regions
Lynds 1551 0.1 Binary system 45 AU apart
OTS 44 Second smallest brown dwarf
Vega 5
Zeta Leporis 5.4 First extrasolar protoplanetary disc discovered
HD 113766 1.8, 4-9, 30-80 Evidence for the formation of Earth-like planets
HD 98800 B 5.9 Spitzer indicated that it may have a planet at
between 1.5-2 AU from a star

See also

References

External links

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