TYC 8998-760-1

TYC 8998-760-1, accompanied by two giant exoplanets, TYC 8998-760-1b and TYC 8998-760-1c [1]
Observation data Epoch J2000       Equinox J2000
Constellation	Musca
Right ascension	13h 25m 12.1263s [2]
Declination	−64° 56′ 20.689″ [2]
Apparent magnitude (V)	11.19 [3]
Characteristics
Evolutionary stage	Pre-main sequence [4]
Spectral type	K3IV [5]
Astrometry
Radial velocity (Rv)	12.84 [6] km/s
Proper motion (μ)	RA: −40.996 [2]  mas/ yr Dec.: −17.734 [2]  mas/ yr
Parallax (π)	10.6124 ± 0.0116  mas [2]
Distance	307.3 ± 0.3  ly (94.2 ± 0.1  pc)
Details
Mass	1.00 [4]  M☉
Radius	1.01 [2]  R☉
Luminosity	0.508 [2]  L☉
Surface gravity (log g)	4.4 [2]  cgs
Temperature	4,862 [2]  K
Age	27 [7]  Myr
Other designations
TIC 449888653, 2MASS J13251211-6456207
Database references
SIMBAD	data

TYC 8998-760-1 is a young star, about 27  Myr old, located 310 light years away in the constellation of Musca, with a mass 1.00±0.02 times the Sun.

Planetary system

There are two giant bodies orbiting the star. The European Southern Observatory's Very Large Telescope photographed the two bodies using its SPHERE instrument, producing the first direct image of multiple bodies orbiting a Sun-like star. ^{[1] [8]}

TYC 8998-760-1 b

TYC 8998-760-1 b is a body which has a mass 21.8 times that of Jupiter (most likely making it a brown dwarf), and a radius of 3 R_J. It orbits at a distance of 162 AU (2.42×10¹⁰ km; 1.51×10¹⁰ mi), or slightly more than 5 times the Neptune-Sun distance. ^{[4] [10] [7]} In July 2021, astronomers reported the detection, for the first time, of an isotope in the atmosphere of an exoplanet; more specifically, the isotope Carbon-13 (C¹³) was found in the atmosphere. ^{[11] [12]}

TYC 8998-760-1 c

TYC 8998-760-1 c is a body with a mass of 7.2 M_J, and orbits at 320 AU (4.8×10¹⁰ km; 3.0×10¹⁰ mi), or slightly more than 11 times the Neptune-Sun distance. ^{[4] [7]}

References