YSES 2

For other uses, see YSES.

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]

YSES 2

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]