HD 92063

This article is about t¹ Carinae. For t² Carinae, see HD 92397.

HD 92063 is a single^[8] star in the southern constellation of Carina. It has the Bayer designation t¹ Carinae, while HD 92063 is the star's identifier from the Henry Draper Catalogue. This is a suspected variable star^[4] and is visible to the naked eye with an apparent visual magnitude of 5.08.^[2] The star is located at a distance of approximately 246 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −10 km/s.^[1] Although it appears at the edge of the Carina Nebula, it is much closer than the nebula. It is also not considered a member of the nearby Alessi 5 open cluster of stars.^[9]

HD 92063

Carina Nebula with HD 92603 circled near the right edge of the frame
Observation data Epoch J2000      Equinox J2000
Constellation	Carina
Right ascension	10h 36m 20.51819s[1]
Declination	−59° 33′ 51.8102″[1]
Apparent magnitude (V)	5.08[2]
Characteristics
Spectral type	K1III[3]
B−V color index	1.172±0.005[2]
Variable type	suspected[4]
Astrometry
Radial velocity (Rv)	−10.15±0.19[1] km/s
Proper motion (μ)	RA: −40.984±0.229[1] mas/yr Dec.: −39.180±0.226[1] mas/yr
Parallax (π)	13.2367±0.1354 mas[1]
Distance	246 ± 3 ly (75.5 ± 0.8 pc)
Absolute magnitude (MV)	0.55[2]
Details
Mass	1.2[5] M☉
Radius	13.85+0.26 −1.17[1] R☉
Luminosity	72.1±0.9[1] L☉
Surface gravity (log g)	2.25[5] cgs
Temperature	4,520+204 −41[1] K
Metallicity [Fe/H]	+0.02[5] dex
Rotational velocity (v sin i)	<1.2[6] km/s
Other designations
t1 Car, NSV 4909, CPD−58°2371, GC 14594, HD 92063, HIP 51912, HR 4164, SAO 238242[7]
Database references
SIMBAD	data

This is an aging K-type giant star with a stellar classification of K1III,^[3] having exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. At present it has 14^[1] times the radius of the Sun. The star is radiating 72^[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,520 K.^[1]