// Workers AI · dad joke modeWhy was YSES 2b sad? Because it had 2b lonely.
| 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] |
| Distance | 2,500 pc |
| Details | |
| Radius | 0.5[1] R☉ |
| Surface gravity (log g) | 4.4[1] cgs |
| Temperature | 3065[1] K |
| Other designations | |
| TYC 8984-2245-1 b, 2MASS J11275535-6626046 b | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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
[edit]- 1 2 3 4 5 6 7 8 9 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.
- 1 2 "Astronomers photograph giant exoplanet in unusual large orbit". earthsky.org. 2021-05-11. Retrieved 2021-06-22.
- ↑ 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.
- ↑ "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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