YSES 2
Star in the constellation Musca
From Wikipedia, the free encyclopedia
YSES 2 is a young, Sun-like star in the constellation of Musca.[6] It is approximately 360 ly from Earth in the Scorpius-Centaurus Association. Its age is 14 million years.[7]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Musca[1] |
| Right ascension | 11h 27m 55.35s[2] |
| Declination | −66° 26′ 04.5″[2] |
| Apparent magnitude (V) | 10.88±0.07[3] |
| Characteristics | |
| Spectral type | K1Ve[4] |
| Astrometry | |
| Proper motion (μ) | RA: −34.025 mas/yr[2] Dec.: +2.319 mas/yr[2] |
| Parallax (π) | 9.1537±0.0118 mas[2] |
| Distance | 356.3 ± 0.5 ly (109.2 ± 0.1 pc) |
| Details[5] | |
| Mass | 1.10±0.03 M☉ |
| Radius | 1.193±0.022 R☉ |
| Luminosity | 0.65 L☉ |
| Temperature | 4,749±40 K |
| Rotation | 2.7325 days |
| Age | 13.9±2.3 Myr |
| Other designations | |
| TIC 295777692, TYC 8984-2245-1 | |
| Database references | |
| SIMBAD | data |
The star was believed to be orbited by the exoplanet YSES 2 b, a super-jovian gas giant with 6.3+1.6
−0.9 times the mass of Jupiter that had an estimated separation of 114 AU.[8][5] It was discovered through direct imaging by Bohn et al. in 2021,[6] but in 2025 was determined to be a background star and not a planet.[9]
