HD 73267
Star in the constellation Pyxis
From Wikipedia, the free encyclopedia
HD 73267 is a star in the southern constellation Pyxis, near the western constellation border with Puppis. It has an apparent visual magnitude of 8.889[3] and can be viewed with a small telescope. The distance to HD 73267 is 164 light years based on parallax, and it is drifting further away with a radial velocity of +51.8 km/s.[6] It has an absolute magnitude of 5.24.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pyxis[1] |
| Right ascension | 08h 36m 17.77623s[2] |
| Declination | −34° 27′ 35.9196″[2] |
| Apparent magnitude (V) | 8.889[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G5V[4] |
| Apparent magnitude (J) | 7.493±0.023[5] |
| Apparent magnitude (H) | 7.126±0.031[5] |
| Apparent magnitude (K) | 7.062±0.023[5] |
| B−V color index | 0.827±0.003[3] |
| Astrometry | |
| Radial velocity (Rv) | +51.836±0.0011[6] km/s |
| Proper motion (μ) | RA: −106.336±0.012 mas/yr[2] Dec.: 123.293±0.013 mas/yr[2] |
| Parallax (π) | 19.9362±0.0130 mas[2] |
| Distance | 163.6 ± 0.1 ly (50.16 ± 0.03 pc) |
| Absolute magnitude (MV) | 5.24[1] |
| Details[3] | |
| Mass | 0.897±0.019 M☉ |
| Radius | 0.909±0.033 R☉ |
| Luminosity | 0.783±0.09[4] L☉ |
| Surface gravity (log g) | 74.447±0.035 cgs |
| Temperature | 5,387±10 K |
| Metallicity [Fe/H] | 0.07±0.04 dex |
| Rotation | ~43 d |
| Rotational velocity (v sin i) | 1.65[4] km/s |
| Age | 8.140±3.505 Gyr |
| Other designations | |
| CD−34°5039, HD 73267, HIP 42202, SAO 199418, PPM 285436, NLTT 19895, GSC 07144-01553, 2MASS J08361779-3427358[7] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
This object is a G-type main-sequence star with a stellar classification of G5V.[4] It is roughly eight billion years old with a near-solar metallicity and is spinning with a projected rotational velocity of 1.65 km/s,[4] giving it a rotation period of around 33 days. The star has 90% of the mass and size of the Sun.[3] It is radiating 78%[4] of the Sun's luminosity from its photosphere at an effective temperature of 5387 K.[3]
Planetary system
In October 2008, a candidate planet was discovered orbiting this star. This object was detected using the radial velocity method by search programs conducted using the HARPS spectrograph.[4] Subsequent analysis of collected data suggests the presence of an additional long-period planet in the system with at least 83% of the mass of Jupiter.[3] In 2022, the inclination and true mass of HD 73267 b were measured, and the presence of a second planet was confirmed using a combination of radial velocity and astrometry.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 4.158+0.681 −0.519 MJ |
2.229+0.091 −0.100 |
3.444+0.001 −0.002 |
0.261±0.004 | 130.843+7.614 −7.660° |
— |
| c | 5.131+0.912 −0.282 MJ |
12.688+0.631 −0.812 |
46.740+2.150 −2.977 |
0.089+0.023 −0.022 |
91.849+18.586 −24.998° |
— |