DS Tucanae

DS Tucanae

DS Tucanae imaged with the NTT. DS Tucanae A is on the right and DS Tucanae B is on the left.
Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Tucana
DS Tucanae A
Right ascension	23h 39m 39.48081s[1]
Declination	−69° 11′ 44.7077″[1]
Apparent magnitude (V)	8.47[2]
DS Tucanae B
Right ascension	23h 39m 39.26965s[3]
Declination	−69° 11′ 39.4936″[3]
Apparent magnitude (V)	9.84[4]
Characteristics
Spectral type	G6V+K3V[4]
Variable type	RS CVn[5]
Astrometry
A
Radial velocity (Rv)	7.20[6] km/s
Proper motion (μ)	RA: 79.529[1] mas/yr Dec.: −67.551[1] mas/yr
Parallax (π)	22.6367±0.0150 mas[1]
Distance	144.08 ± 0.10 ly (44.18 ± 0.03 pc)
B
Radial velocity (Rv)	5.32[7] km/s
Proper motion (μ)	RA: 78.133[3] mas/yr Dec.: −65.845[3] mas/yr
Parallax (π)	22.6524 ± 0.0125 mas[3]
Distance	143.98 ± 0.08 ly (44.15 ± 0.02 pc)
Details
DS Tucanae A
Mass	1.01±0.06[8] M☉
Radius	0.964±0.029[8] R☉
Luminosity	0.725±0.013[8] L☉
Temperature	5,428±80[8] K
Rotational velocity (v sin i)	27.75+1.73 −1.54[9] km/s
Age	45±4[8] Myr
DS Tucanae B
Mass	0.84±0.06[8] M☉
Radius	0.864±0.036[8] R☉
Luminosity	0.327±0.010[8] L☉
Temperature	4,700±90[8] K
Age	45±4[8] Myr
Other designations
DS Tuc, HD 222259, CCDM J23397-6912AB, CD−69°2106, HIP 116748, WDS J23397-6912AB, TIC 410214986, TOI 200
Database references
SIMBAD	AB
	A
	B
	Ab

DS Tucanae (HD 222259) is a binary star system 144 light years away in the constellation of Tucana. It has an apparent visual magnitude of 8.5,^[8] and is a RS Canum Venaticorum variable.^[5] The system is notable for being young as a member of the 45 Myr old Tucana-Horologium moving group^[10] and for the primary star hosting the confirmed exoplanet DS Tucanae Ab, discovered by THYME, using TESS.^{[11][8][12][13]}