List of directly imaged exoplanets

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Motion interpolation of seven images of the HR 8799 system taken from the W. M. Keck Observatory over seven years, featuring four exoplanets

This is a list of extrasolar planets that have been directly observed, sorted by observed separations. This method works best for young planets that emit infrared light and are far from the glare of the star. Currently, this list includes both directly imaged planets and imaged planetary-mass companions (objects that orbit a star but formed through a binary-star-formation process, not a planet-formation process). This list does not include free-floating planetary-mass objects in star-forming regions or young associations, which are also referred to as rogue planets.

The data given for each planet is taken from the latest published paper on the planet to have that data. In many cases it is not possible to have an exact value, and an estimated range is instead provided. The lightest, coldest, and oldest planet directly imaged is Proxima Centauri c, which has a mass of 7 MEarth, an effective temperature of 39 K, and an age of about 4.8 Ga. This list includes the four members of the multi-planet system that orbit HR 8799.

Key[]

Exoplanets have been discovered using several different methods for collecting or combining direct images to isolate planets from the background light of their star. Non-Redundant Aperture Masking Interferometry is a method of combining the views of multiple telescopes into a single image, while the other methods are algorithms for combining multiple direct images taken from the same telescope.

  • ADI = Angular Differential Imaging
  • KLIP = Karhunen–Loève Image Processing
  • LOCI = Locally Optimized Combination of Images
  • NRM = Non-Redundant Aperture Masking Interferometry
  • RSDI = Reference Star Differential Imaging
  • SDI = Spectral Differential Imaging
  • TLOCI = Template Locally Optimized Combination of Images

Exoplanets[]

Although listed in the table below, the identity of Fomalhaut b is disputed. It may not actually be a true exoplanet.

  †   There is no consensus whether these companions of stars should be considered sub-brown dwarfs or planets

Check https://exoplanetarchive.ipac.caltech.edu/docs/imaging.html to see more directly imaged planets. It contains an updated table of all of them.

Star Exoplanet Mass (MJ) Radius (RJ) Period (yr) Observed separation (AU) Eccentricity Distance to Earth (ly) Year of discovery Imaging technique Ref(s).
Beta Pictoris Beta Pictoris b 12.7±0.3 1.5±0.2 22.47+3.77
−2.26		 9 0.08+0.09
−0.05		 63.4±0.1 2008 RSDI [1][2][3][4]
51 Eridani 51 Eridani b 2.6 1.0 ? 13 ? 96 2014 ADI, KLIP [5]
HR 8799 HR 8799 e 7.0 1.3 49 14.5 0.14 128 2010 ADI, LOCI
HR 8799 d 7.0 1.3 100 24.5 0.09 128 2008 ADI, LOCI
HR 8799 c 7.0 1.3 189 37.4 0.24 128 2008 ADI, LOCI
HR 8799 b 5.0 1.2 474 69.2 0.17 128 2008 ADI, LOCI
ROXs 42B ROXs 42Bb 9±3 2.5 Un­known 157 Un­known 440±16 2013 Direct imaging [6]
2M1207 2M1207b † 4.2 1.5 1620 40.6 0.37 170 2004 Direct imaging
1RXS J1609 1RXS 1609 b† 8–14 1.7 6518 331.1 0.08 470 2008 Direct imaging
2M J044144 2M J044144 b† 5–10 15 456 2010 Direct imaging
Fomalhaut Fomalhaut b (?) < 2.0 872–2000 116.0 25 2008/2012 RSDI
LkCa 15 LkCa 15 b † 6.2 1.8 42,315 23.5 0.32 477 2011 NRM
WD 0806-661 WD 0806-661 B† 7–9 ? ? 2500 ? 62 2011 Direct imaging
DT Virginis Ross 458(AB) c† 8.5 1.8 33,081 1167.7 0.17 38[7] 2011 Direct imaging
HD 95086 HD 95086 b 5.0 ? ? 56 ? 295 2013 ADI, LOCI
59 Virginis Gliese 504 b † 4+4.5
−1		 ? ? 43.5 ? 57.27 2013 ADI, LOCI
kappa Andromedae kappa Andromedae b 13+12
−2		 ? 242–900 55 0.69–0.85 168.0 2013 ADI, LOCI
FW Tauri † 10±4 ? ~12,000[8] 330 ? 472.93[9] 2013 Direct imaging
HD 106906 HD 106906 b † 11±2 ? ? 650 ? 300 2013 ADI
GU Piscium GU Piscium b † 11±2 163,000 2000 155 2014 Direct imaging
VHS 1256-1257 VHS 1256 b † 11.2 3900 102 40 2015 Direct imaging
CVSO 30 CVSO 30 c † 4.7 1.63+0.87
−0.34[10]		 27,000 660 1200 2016 Direct imaging
HIP 65426 HIP 65426 b 6-12 1.5 600 92 363 2017 ADI, TLOCI [11][12]
PDS 70 PDS 70 b ? ? 21 370 2018 ADI, TLOCI
PDS 70 c ? ? 35 370 2019 SDI
HD 203030 HD 203030 B 11+4
−3 		487 128 2006 SDI [13]
TYC 9486-927-1 2MASS J2126–8140 13.3±1.7 ? ~900,000 6684 ? 80.72±13.86 2006/2016 Direct imaging [14]
Alpha Centauri Candidate 1 0.11±0.05 0.459±0.17 ~1 1.1 4.37 2021
COCONUTS-2b 6.3+1.5
−1.9 		1.1±0.03 ~1,100,000 6471 35.51±0.01 2011/2021 Direct imaging [15]

See also[]

References[]

  1. ^ Wang; et al. (2016). "The Orbit and Transit Prospects for β Pictoris b Constrained with One Milliarcsecond Astrometry". The Astronomical Journal. 152 (4): 97. arXiv:1607.05272. Bibcode:2016AJ....152...97W. doi:10.3847/0004-6256/152/4/97. S2CID 119181273.
  2. ^ Bonnefoy; et al. (2014). "Physical and orbital properties of β Pictoris b". Astronomy & Astrophysics. 567: L9. arXiv:1407.4001. Bibcode:2014A&A...567L...9B. doi:10.1051/0004-6361/201424041. S2CID 55863534.
  3. ^ Currie, Thayne; et al. (2013). "A Combined Very Large Telescope and Gemini Study of the Atmosphere of the Directly Imaged Planet, β Pictoris b". The Astrophysical Journal. 776 (1): 15. arXiv:1306.0610. Bibcode:2013ApJ...776...15C. doi:10.1088/0004-637X/776/1/15. ISSN 0004-637X. S2CID 118825345.
  4. ^ Morzinski; et al. (2015). "Magellan Adaptive Optics First-light Observations of the Exoplanet β Pic b. II. 3-5 μm Direct Imaging with MagAO+Clio, and the Empirical Bolometric Luminosity of a Self-luminous Giant Planet". The Astrophysical Journal. 815 (2): 108. arXiv:1511.02894. Bibcode:2015ApJ...815..108M. doi:10.1088/0004-637X/815/2/108. S2CID 118559024.
  5. ^ Macintoshi; et al. (2015). "Discovery and spectroscopy of the young Jovian planet 51 Eri b with the Gemini Planet Imager". Science. 350 (6256): 64–7. arXiv:1508.03084. Bibcode:2015Sci...350...64M. doi:10.1126/science.aac5891. PMID 26272904. S2CID 8177945.
  6. ^ Currie, Thayne; Daemgen, Sebastian; Debes, John; Lafreniere, David; Itoh, Yoichi; Jayawardhana, Ray; Ratzka, Thorsten; Correia, Serge (2014). "Direct Imaging and Spectroscopy of a Candidate Companion Below/Near the Deuterium-Burning Limit In The Young Binary Star System, ROXs 42B". The Astrophysical Journal Letters. 780 (2): 30. arXiv:1310.4825. Bibcode:2014ApJ...780L..30C. doi:10.1088/2041-8205/780/2/L30. S2CID 118464822.
  7. ^ "Ross 458(AB) c". The Extrasolar Planet Encyclopaedia. Retrieved 2012-10-24.
  8. ^ "Planet FW Tau b.". The Extrasolar Planet Encyclopaedia. Retrieved 21 Feb 2018.
  9. ^ "FW Tauri". Universe Guide. Retrieved 21 Feb 2018.
  10. ^ "Planet CVSO 30 c". The Extrasolar Planet Encyclopaedia. Retrieved 2 Nov 2017.
  11. ^ "ESO's SPHERE Unveils its First Exoplanet". www.eso.org. Retrieved 29 November 2017.
  12. ^ Chauvin; et al. (2017). "Discovery of a warm, dusty giant planet around HIP 65426". Astronomy & Astrophysics. 605: L9. arXiv:1707.01413. Bibcode:2017A&A...605L...9C. doi:10.1051/0004-6361/201731152. S2CID 102344893.
  13. ^ Miles-Páez, Paulo A.; Metchev, Stanimir; Luhman, Kevin L.; Marengo, Massimo; Hulsebus, Alan (2017). "The Prototypical Young L/T-Transition Dwarf HD 203030B Likely Has Planetary Mass". The Astronomical Journal. 154 (6): 262. arXiv:1710.11274. Bibcode:2017AJ....154..262M. doi:10.3847/1538-3881/aa9711. S2CID 67821107.
  14. ^ Deacon, N. R.; Schlieder, J. E.; Murphy, S. J. (2016-02-23). "A nearby young M dwarf with a wide, possibly planetary-mass companion". Monthly Notices of the Royal Astronomical Society. 457 (3): 3191–3199. arXiv:1601.06162. Bibcode:2016MNRAS.457.3191D. doi:10.1093/mnras/stw172. hdl:2299/17156. ISSN 0035-8711. S2CID 18220333.
  15. ^ Zhang, Zhoujian; Liu, Michael C.; Claytor, Zachary R.; Best, William M. J.; Dupuy, Trent J.; Siverd, Robert J. (2021-08-01). "The Second Discovery from the COol Companions ON Ultrawide orbiTS (COCONUTS) Program: A Cold Wide-Orbit Exoplanet around a Young Field M Dwarf at 10.9 pc". The Astrophysical Journal Letters. 916 (2): L11. arXiv:2107.02805. doi:10.3847/2041-8213/ac1123. ISSN 2041-8205. S2CID 236464073.

External links[]

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