Theta Pictoris

Theta Pictoris (θ Pic) is a star in the Pictor constellation.

Theta Pictoris

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Pictor
θ Pic AB
Right ascension	05h 24m 46.28819s[1]
Declination	−52° 18′ 58.4836″[1]
Apparent magnitude (V)	6.26[2]
θ Pic C
Right ascension	05h 24m 42.32511s[3]
Declination	−52° 18′ 46.9457″[3]
Characteristics
θ Pic AB
Spectral type	A0V[4] (A1III + Am)[5]
B−V color index	0.067±0.004[2]
θ Pic C
Spectral type	A2V[5]
Astrometry
θ Pic AB
Radial velocity (Rv)	−3.1±0.8[6] km/s
Proper motion (μ)	RA: −4.00[1] mas/yr Dec.: −27.71[1] mas/yr
Parallax (π)	6.36±0.32 mas[1]
Distance	510 ± 30 ly (157 ± 8 pc)
Absolute magnitude (MV)	0.28[2]
θ Pic C
Radial velocity (Rv)	−8.20±3.7[6] km/s
Proper motion (μ)	RA: −5.411[3] mas/yr Dec.: −27.743[3] mas/yr
Parallax (π)	6.3027±0.0322 mas[3]
Distance	517 ± 3 ly (158.7 ± 0.8 pc)
Details
Luminosity	68.05[2] L☉
Other designations
θ Pic AB: θ Pic, CD−52°1198, HD 35860, HIP 25303, HR 1818, SAO 233965, WDS J05248-5219AB[7]
θ Pic C: CPD−52°717, HD 35859, HIP 25298, HR 1818, SAO 233964, WDS J05248-5219C[8]
Database references
θ Pic AB
SIMBAD	data
θ Pic C
SIMBAD	data

Theta Pictoris is a multiple star system:^{[citation needed]} AB: 7.0, 7.5; PA 152°, separation 0.2" C: 7.0; PA 287°, separation 38".

The Theta Pictoris system consists of a total of 4 stars.^[9] Theta Pictoris C (HD 35859), an A2V star of about 6.77 magnitude,^[8] can be distinguished visually with a small telescope from the main system Theta Pictoris AB; its angular separation from AB is 38.3 arc seconds.^[10] Theta Pictoris AB, in turn, consists of a magnitude 6.76 A0V star^[7] and a magnitude 7.40 star separated by 0.287" with an orbital period of 123.2 years and eccentricity of 0.692.^[10][11] One of them is also an unresolved spectroscopic binary.^[9]