List of exoplanets discovered via astrometry

Astrometry has been used to discover a handful of exoplanets, mostly gas giants more massive than Jupiter. It is based on measuring a star's proper motion, and seeing how that position changes over time: a planet with a sufficiently large mass is able to gravitationally pull its host star, making its proper motion vary over large timescales. This cause a proper motion discrepancy between two observations (e.g. Hipparcos and Gaia). This list contains discoveries using this method, it does not contain exoplanets first detected by another method, but later detected using astrometry, e.g. Epsilon Indi Ab or Gamma Cephei Ab.

List

This list contain only confirmed planets. Many candidate planets were decected via astrometry, including Gliese 65 Ab (which would be the nearest planet detected by this method, if confirmed), 9,698 candidates shown in a paper ^[1] as well as many more detected via Hipparcos-Gaia astrometry in another studies. ^{[2] [3]}

Name	Mass	Semi-major axis (AU)	Orbital period (years)	Eccentricity	Inclination (°)	Discovery year	Distance (ly)	Host star mass (M☉)	Host star radius (R☉)	Host star temperature (K)	Notes and references
AB Pictoris c	2.5–9.0  MJ	4±1				2025	163.5 [4]	0.90±0.10	0.92±0.03	5,188±50	[5]
EQ Pegasi Ab	2.26±0.57  MJ	0.643±0.001	0.779±0.004	0.35±0.19	69.20±25.61	2022	20.428±0.004 [6]	0.436±0.001	0.409±0.016 [7]	3,491±35 [7]	[8]
Gaia-4 b	11.80+0.73 −0.66  MJ		1.565±0.004	0.338+0.026 −0.023	116.9+4.2 −4.4	2024	240.4 ± 0.3262	0.644+0.025 −0.023	0.624+0.014 −0.015	4,034±77	[9]
HD 11506 d	12.8+0.6 −0.5  MJ	18.20+0.06 −0.09	72.6+0.7 −0.8	0.29+0.02 −0.03	90+6 −5	2022	167.0±0.2 [10]	1.22±0.02	1.06±0.01 [11]	5,833±28 [11]	[12]
HD 28185 c	5.68+0.44 −0.36  MJ	8.54+0.21 −0.14	25.27+0.91 −0.61	0.15±0.04	73+10.0 −8.4 or 109.5+9.1 −12.0	2022	128.0±0.1	0.974±0.018	1.048±0.015	5,602±36	Initially discovered as a brown dwarf, revealed to be an exoplanet by later studies. [13] [14] Planetary parameters taken from Feng et al. 2024, [14] stellar parameters from Venner et al. 2024. [13]
HD 75898 c	8.49+0.65 −0.63  MJ	7.39+0.04 −0.05	18.39+0.12 −0.11	0.08±0.01	153+2 −3	2024	254.6±0.7 [15]	1.295±0.015	1.58±0.11 [16]	6,122±52	[12]
HD 118203 c	11.0+1.3 −1.0  MJ	6.20±0.20	13.9+0.66 −0.63	0.257±0.034	95+15 −19	2024	330.2±0.5 [17]	1.353±0.006 [18]	1.993±0.065 [18]	5,872±20 [18]	[19]
HD 128717 b	12.8  MJ	2.18	3.0			2024	240 ± 0.55	1.17+0.06 −0.16	1.275	6,158±115	[20]
HD 176051 b	1.5±0.3 or 2.26  MJ	1.76 or 2.02	2.78±0.11		115.8±8.2	2010	48.4±0.261 [21]	0.71 (B) or 1.07 (A)	0.81 (B) or 1.06 (A) [22]	6,000 (A) [23]	Orbiting either HD 176051 A or HD 176051 B, but more likely orbiting the latter. [24] [25]
HD 222237 b	5.19±0.58  MJ	10.8+1.1 −1.0	40.8+5.8 −4.5	0.56±0.03	49.9+3.4 −2.8	2024	37.3	0.76±0.09	0.71±0.06	4,751±139	[26]
HIP 11696 b	4–16  MJ	2.5–28				2024	160.9±0.2 [27]	1.299±0.102 [28]	1.438±0.109 [28]	6,428±215 [28]	[29]
HIP 47110 b	3–10  MJ	3–30				2024	126.2±0.1 [30]	0.891±0.070 [28]	0.873±0.060 [28]	5,507±184 [28]	[29]
HIP 99770 b	16.1+5.4 −5.0  MJ	16.9+3.4 −1.9		0.25+0.14 −0.16	148+13 −11	2022	132.9±0.4 [31]	2.14±0.15	2.16	8,790+1,513 −1,300	Discovered by joint of astrometry and direct imaging. Its radius is about 1.5  RJ [32] [33]
TVLM 513–46546 b	0.347–0.418  MJ	0.279–0.307	0.61±0.014	~0	~80	2020	35.01±0.05 [34]	0.06–0.08 [35]	0.097–0.109 [35]	2,247±55 [36]	[37]

See also

• Methods of detecting exoplanets#Astrometry
• Lists of exoplanets
• Astrometric binary
• List of directly imaged exoplanets
• List of exoplanets detected by radial velocity
• List of exoplanets detected by microlensing
• List of transiting exoplanets
• List of exoplanets detected by timing
• List of exoplanets discovered in 2024

References

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