Delta Crateris

Delta Crateris (δ Crt, δ Crateris) is a solitary^[8] star in the southern constellation of Crater. With an apparent visual magnitude of 3.56,^[2] it is the brightest star^[9] in this rather dim constellation. It has an annual parallax shift of 17.017 mas as measured from Earth,^[1] indicating Delta Crateris lies at a distance of 192 ly from the Sun.

δ Crateris

Location of δ Crateris (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Crater
Right ascension	11h 19m 20.4473s[1]
Declination	−14° 46′ 42.743″[1]
Apparent magnitude (V)	3.56[2]
Characteristics
Evolutionary stage	red clump[3]
Spectral type	K0 III[2]
B−V color index	1.12[2]
Astrometry
Radial velocity (Rv)	−4.94±0.21[4] km/s
Proper motion (μ)	RA: −122.958[1] mas/yr Dec.: +207.083[1] mas/yr
Parallax (π)	17.017±0.1617 mas[1]
Distance	192 ± 2 ly (58.8 ± 0.6 pc)[1]
Absolute magnitude (MV)	−0.321[3]
Details[5]
Mass	1.47 ± 0.2 M☉
Radius	20.14±0.48 R☉
Luminosity	154.8±4.9 L☉
Surface gravity (log g)	2.00 ± 0.08 cgs
Temperature	4,540 ± 40 K
Metallicity [Fe/H]	−0.43±0.10 dex
Age	2.89[6] Gyr
Other designations
δ Crt, 12 Crateris, BD−13°3345, FK5 426, HD 98430, HIP 55282, HR 4382, SAO 156605.[7]
Database references
SIMBAD	data

Characteristics

This is an evolved orange-hued giant star belonging to the spectral class K0 III. Delta Crateris is a member of the so-called red clump, indicating that it is generating energy through the thermonuclear fusion of helium at its core.^[3] The star has an estimated 1.47 times the mass of the Sun but has expanded to 20 times the Sun's radius.^[5]

It is around 2.89^[6] billion years old with a rotation rate that is too small to measure; the projected rotational velocity is 0.0 km/s.^[4] Delta Crateris is radiating 171.4±9.0 as much luminosity as the Sun^[6] from its outer envelope at an effective temperature of 4,540 K.^[5]