Astronomy:YSES 2b
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Short description: Star in the constelation Musca
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Musca[citation needed] |
| Right ascension | 11h 27m 55.3s[citation needed] |
| Declination | −66° 26′ 04″[citation needed] |
| Characteristics | |
| Evolutionary stage | main sequence[citation needed] |
| Spectral type | late M[citation needed] |
| Astrometry | |
| Proper motion (μ) | RA: −25.42+0.25 −0.18[1] mas/yr Dec.: 3.30+0.28 −0.30[1] mas/yr |
| Parallax (π) | 0.41+0.37 −0.28[1] mas |
| Distance | 2,500[citation needed] pc |
| Details | |
| Radius | 0.5[citation needed] R☉ |
| Surface gravity (log g) | 4.4[citation needed] cgs |
| Temperature | 3065[citation needed] K |
| Other designations | |
TYC 8984-2245-1 b, 2MASS J11275535-6626046 b[citation needed] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | 2b data |
| Extrasolar Planets Encyclopaedia | 2 b 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
- ↑ 1.0 1.1 1.2 Kenworthy, Matthew; Stolker, Tomas; Kammerer, Jens; Balmer, William; Vigan, Arthur; Lacour, Sylvestre; Otten, Gilles; Mamajek, Eric et al. (September 2025). "YSES 2b is a background star: Differential astrometric M-dwarf measurements in time". Astronomy & Astrophysics 701: A104. doi:10.1051/0004-6361/202556170. ISSN 0004-6361. https://www.aanda.org/10.1051/0004-6361/202556170.
- ↑ 2.0 2.1 "Astronomers photograph giant exoplanet in unusual large orbit" (in en-US). 2021-05-11. https://earthsky.org/space/giant-exoplanet-yses-2b-imaged-huge-orbit-sunlike-star/.
- ↑ Bohn, Alexander J.; Ginski, Christian; Kenworthy, Matthew A.; Mamajek, Eric E.; Pecaut, Mark J.; Mugrauer, Markus; Vogt, Nikolaus; Adam, Christian et al. (2021-04-01). "Discovery of a directly imaged planet to the young solar analog YSES 2" (in en). Astronomy & Astrophysics 648: A73. doi:10.1051/0004-6361/202140508. ISSN 0004-6361. Bibcode: 2021A&A...648A..73B.
- ↑ "Giant planet at large distance from sun-like star puzzles astronomers - Astronomie.nl" (in nl). https://www.astronomie.nl/nieuws/en/giant-planet-at-large-distance-from-sun-like-star-puzzles-astronomers-2763.
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