HD 11025
G-type star in the constellation Octans
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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]
| Observation data Epoch J2000.0 Equinox 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]