YSES 2b

For other uses, see YSES.
YSES 2b
Observation data
Epoch J2000      Equinox ICRS
Constellation Musca
Right ascension 11h 27m 55.3s[1]
Declination −66° 26′ 04″[1]
Characteristics
Evolutionary stage main sequence
Spectral type late M
Astrometry
Proper motion (μ) RA: −25.42+0.25
−0.18 mas/yr[1]
Dec.: 3.30+0.28
−0.30 mas/yr[1]
Parallax (π)0.41+0.37
−0.28 mas[1]
Distance2,500 pc
Details
Radius0.5[1] R☉
Surface gravity (log g)4.4[1] cgs
Temperature3065[1] K
Other designations
TYC 8984-2245-1 b, 2MASS J11275535-6626046 b
Database references
SIMBADdata
Exoplanet Archivedata

YSES 2b is a red dwarf star located in the constellation of Musca.[2] It was discovered through direct imaging by Bohn et al. in 2021.[2][3] It was initially suspected to be a long-period planet, but in 2025 it was found to be a background star unrelated to YSES 2, a young, Sun-like star which is approximately 360 ly from Earth in Scorpius-Centaurus Association whose age is 14 million years.[4][1]

References

  1. ^ a b c d e f g h Kenworthy, Matthew; Stolker, Tomas; Kammerer, Jens; Balmer, William; Vigan, Arthur; Lacour, Sylvestre; Otten, Gilles; Mamajek, Eric; Ginski, Christian; Nowak, Mathias; Martos, Steven; Wang, Jason; Rickman, Emily; Janson, Markus; Bohn, Alexander (September 2025). "YSES 2b is a background star: Differential astrometric M-dwarf measurements in time". Astronomy & Astrophysics. 701: A104. arXiv:2509.09504. doi:10.1051/0004-6361/202556170. ISSN 0004-6361.
  2. ^ a b "Astronomers photograph giant exoplanet in unusual large orbit". earthsky.org. 2021-05-11. Retrieved 2021-06-22.
  3. ^ Bohn, Alexander J.; Ginski, Christian; Kenworthy, Matthew A.; Mamajek, Eric E.; Pecaut, Mark J.; Mugrauer, Markus; Vogt, Nikolaus; Adam, Christian; Meshkat, Tiffany; Reggiani, Maddalena; Snik, Frans (2021-04-01). "Discovery of a directly imaged planet to the young solar analog YSES 2". Astronomy & Astrophysics. 648: A73. arXiv:2104.08285. Bibcode:2021A&A...648A..73B. doi:10.1051/0004-6361/202140508. ISSN 0004-6361.
  4. ^ "Giant planet at large distance from sun-like star puzzles astronomers - Astronomie.nl". www.astronomie.nl (in Dutch). Retrieved 2021-07-17.
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