| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Norma |
| Right ascension | 15h 49m 37.69382s[1] |
| Declination | –49° 57′ 48.6771″[1] |
| Apparent magnitude (V) | 9.36[2] |
| Characteristics | |
| Spectral type | G5[3] |
| B−Vcolor index | 0.935±0.005[2] |
| Astrometry | |
| Radial velocity (Rv) | 61.67±0.24[1] km/s |
| Proper motion (μ) | RA: -232.760[1]mas/yr Dec.: -92.540[1]mas/yr |
| Parallax (π) | 22.0467±0.0443 mas[1] |
| Distance | 147.9 ± 0.3 ly (45.36 ± 0.09 pc) |
| Absolute magnitude (MV) | 5.89[2] |
| Details | |
| Mass | 0.86±0.02[4] M☉ |
| Radius | 0.85+0.02 −0.03[1] R☉ |
| Luminosity | 0.393±0.001[1] L☉ |
| Surface gravity (log g) | 4.68±0.09[4] cgs |
| Temperature | 4,967+88 −65[1] K |
| Metallicity [Fe/H] | 0.18±0.04[4] dex |
| Age | 5.30±4.22[4] Gyr |
| Other designations | |
| CD−49°10033,Gaia DR2 5982775854377691136,HD 330075,HIP 77517,SAO 226248,PPM 321068,LTT 6312,NLTT 41237,2MASS J15493770-4957486[5] | |
| Database references | |
| SIMBAD | data |
HD 330075 is astar in the southernconstellation ofNorma. It has a yellow hue and anapparent visual magnitude of 9.36,[2] which makes it too faint to be seen with the naked eye – it is visible only withtelescope or powerfulbinoculars.Parallax measurements provide a distance estimate of 148 light years from theSun, and it is drifting further away with aradial velocity of 62 km/s.[1] The star is estimated to have come as close as 111.5 light-years some 409 million years ago.[2]
This object appears to be a slightly evolved dwarf with aspectral class of G5. That is, it is nearing the end of itsmain sequence lifetimes and is becoming asubgiant star. The star has very lowchromosphericactivity and is around five billion years old.[3] It is smaller than the Sun with 86%[4] of theSun's mass and 85%[1] of thesolar radius. As a consequence, it is radiating just 39% of theluminosity of the Sun from itsphotosphere at aneffective temperature of 4,967 K.[1] It has a super-solarmetallicity, which means the abundance of elements other than hydrogen and helium appears much higher than in the Sun.[4]
In 2004, the discovery of ahot Jupiterplanet orbiting close to the star was announced. This is the first planet discovered by the then-newHARPS spectrograph.[3]
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥ 0.76 MJ | 0.043 | 3.369±0.004 | 0 | — | — |
