Theta¹ Crucis

Theta¹ Crucis
Observation data; Epoch J2000 Equinox J2000
Constellation	Crux
Right ascension	12h 03m 01.5010s
Declination	−63° 18′ 46.548″
Apparent magnitude (V)	4.30
Characteristics
Spectral type	Am
U−B color index	+0.04
B−V color index	+0.27
Astrometry
Radial velocity (Rv)	−2.4 km/s
Proper motion (μ)	RA: −152.53 mas/yr; Dec.: 6.10 mas/yr
Parallax (π)	14.19 ± 0.54 mas
Distance	230 ± 9 ly; (70 ± 3 pc)
Other designations
	HR 4599, HD 104671, SAO 251705, HIP 58758.

Theta¹ Crucis (θ¹ Cru, Theta¹ Crucis) is a spectroscopic binary star in the constellation Crux. It has an apparent magnitude of 4.32^m. The spectral class of the star is Am. Theta¹ Crucis is located at 230 light-years from the Sun.

References

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Observation data Epoch J2000 Equinox J2000
Constellation	Crux
Right ascension	12^h 03^m 01.5010^s^[1]
Declination	−63° 18′ 46.548″^[1]
Apparent magnitude (V)	4.30
Characteristics
Spectral type	Am
U−B color index	+0.04^[2]
B−V color index	+0.27^[2]
Astrometry

Radial velocity (R_v)	−2.4^[3] km/s
Proper motion (μ)	RA: −152.53^[1] mas/yr Dec.: 6.10^[1] mas/yr
Parallax (π)	14.19 ± 0.54^[1] mas
Distance	230 ± 9 ly (70 ± 3 pc)

Other designations
HR 4599, HD 104671, SAO 251705, HIP 58758.^[4]