Theta Indi

Theta Indi (θ Ind) is a binary star in the constellation Indus. Its apparent magnitude is 4.40^[2] and it is approximately 98.8 light years away based on parallax.^[1] The smaller companion, B, has a spectral type of G0V (yellow main-sequence) and an apparent magnitude of 7.18 at a separation of 6.71″.^[9] Recent observations suggest the primary is itself a binary with components Aa and Ab orbiting at 0.0617″, estimated period about 1.3 years.^[10][11]

θ Indi

Location of θ Indi (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Indus
Right ascension	21h 19m 51.98955s[1]
Declination	−53° 26′ 57.9315″[1]
Apparent magnitude (V)	4.40[2]
Characteristics
Spectral type	A5IV-V[3]
B−V color index	+0.18[2]
Astrometry
Radial velocity (Rv)	−14.50[4] km/s
Proper motion (μ)	RA: +107.90[1] mas/yr Dec.: −66.41[1] mas/yr
Parallax (π)	33.02±0.49 mas[1]
Distance	99 ± 1 ly (30.3 ± 0.4 pc)
Absolute magnitude (MV)	1.98[5]
Details
Mass	1.75[6] M☉
Radius	1.61[7] R☉
Luminosity	12.95[8] L☉
Temperature	8,332[6] K
Rotational velocity (v sin i)	135[7] km/s
Age	150±100[7] Myr
Other designations
CPD−53°10037, GC 29819, HIP 105319, HR 8140, HD 202730, SAO 246965, WDS J21199-5327AB[2]
Database references
SIMBAD	data