HD 11025

HD 11025 (HR 525) is a suspected astrometric binary^[10] in the southern circumpolar constellation Octans. It has an apparent magnitude of 5.67,^[2] making it visible to the naked eye if viewed under ideal conditions. Located 378 light years away,^[1] it is receding with a heliocentric radial velocity of 18 km/s.^[5]

HD 11025

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Octans
Right ascension	01h 37m 28.036s[1]
Declination	−84° 46′ 10.62″[1]
Apparent magnitude (V)	5.67±0.01[2]
Characteristics
Spectral type	G8 III[3]
U−B color index	+0.66[4]
B−V color index	+0.94[4]
Astrometry
Radial velocity (Rv)	18±2[5] km/s
Proper motion (μ)	RA: +34.227 mas/yr[1] Dec.: +26.193 mas/yr[1]
Parallax (π)	8.6392±0.1495 mas[1]
Distance	378 ± 7 ly (116 ± 2 pc)
Absolute magnitude (MV)	+0.33[6]
Details[7]
Mass	2.61±0.13 M☉
Radius	9.52±0.24 R☉
Luminosity	56±2 L☉
Surface gravity (log g)	2.96±0.08 cgs
Temperature	5,128±46 K
Metallicity [Fe/H]	0.00±0.04 dex
Rotational velocity (v sin i)	7.5±1[8] km/s
Age	500[9] Myr
Other designations
4 G. Octantis, CPD−85°17, FK5 916, GC 2092, HD 11025, HIP 7568, HR 525, SAO 258273
Database references
SIMBAD	data

The visible component is a yellow giant of spectral class G8 III.^[3] At present it has 2.61 times the mass of the Sun^[7] but at an age of 500 million years,^[9] has expanded to 9.52 times the radius of the Sun.^[7] It shines at 56 L_☉ from its enlarged photosphere at an effective temperature of 5,128 K,^[7] giving it a yellow glow. HD 11025 has a solar metallicity^[7] and spins with a moderate projected rotational velocity of 7.5 km/s.^[8]