| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sculptor |
| HD 4113 A | |
| Right ascension | 00h 43m 12.59559s[1] |
| Declination | −37° 58′ 57.4777″[1] |
| Apparent magnitude (V) | 7.880±0.013[2] |
| HD 4113 B | |
| Right ascension | 00h 43m 11.89423s[3] |
| Declination | −37° 58′ 09.1687″[3] |
| Apparent magnitude (V) | 12.70±0.02[2] |
| Characteristics | |
| Spectral type | G5V and M0–1V[2] |
| B−V color index | 0.716±0.003[2] |
| Astrometry | |
| HD 4113 A | |
| Radial velocity (Rv) | 5.05±0.12[1] km/s |
| Proper motion (μ) | RA: 49.412±0.016 mas/yr[1] Dec.: −114.290±0.024 mas/yr[1] |
| Parallax (π) | 23.8256 ± 0.0240 mas[1] |
| Distance | 136.9 ± 0.1 ly (41.97 ± 0.04 pc) |
| Absolute magnitude (MV) | 4.780±0.046[2] |
| HD 4113 B | |
| Radial velocity (Rv) | 4.44±0.39[3] km/s |
| Proper motion (μ) | RA: 53.733±0.022 mas/yr[3] Dec.: −113.983±0.032 mas/yr[3] |
| Parallax (π) | 23.9023 ± 0.0327 mas[3] |
| Distance | 136.5 ± 0.2 ly (41.84 ± 0.06 pc) |
| Absolute magnitude (MV) | 9.600±0.049[2] |
| Orbit[4] | |
| Companion | HD 4113 C |
| Period (P) | 348.325+21.932 −15.139 yr |
| Semi-major axis (a) | 50.438+2.060 −1.420 AU |
| Eccentricity (e) | 0.648+0.008 −0.007 |
| Inclination (i) | 83.456+2.342 −1.269° |
| Longitude of the node (Ω) | 225.686+0.704 −1.486° |
| Periastron epoch (T) | 2324305.035+127045.323 −7894.349 |
| Argument of periastron (ω) (secondary) | 249.665+3.552 −4.805° |
| Semi-amplitude (K1) (primary) | 0.263535+0.002058 −0.003037 km/s |
| Details[5] | |
| A | |
| Mass | 1.02+0.02 −0.03 M☉ |
| Radius | 1.08+0.02 −0.04[6] R☉ |
| Luminosity | 1.085+0.04 −0.03[6] L☉ |
| Surface gravity (log g) | 4.31±0.04 cgs |
| Temperature | 5,638±50 K |
| Metallicity [Fe/H] | 0.20±0.04 dex |
| Rotational velocity (v sin i) | 2.324[2] km/s |
| Age | 7.29+1.91 −1.46 or 5.0+1.3 −1.7[2] Gyr |
| B | |
| Mass | 0.55[2] M☉ |
| Surface gravity (log g) | 4.76[2] cgs |
| Temperature | 3,833[2] K |
| C | |
| Mass | 51.913+0.604 −0.458[4] MJup |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 4113 is a dual star system in the southern constellation of Sculptor. It is too faint to be viewed with the naked eye, having an apparent visual magnitude of 7.88.[2] The distance to this star, as estimated by parallax measurements, is 137 light years.[1] It is receding away from the Sun with a radial velocity of +5 km/s.[1]
The primary member of this system, component A, is a Sun-like G-type main-sequence star with a stellar classification of G5V.[2] Estimates of its age are five[2] to seven[5] billion years old, and it is spinning with a leisurely projected rotational velocity of 2.3 km/s.[2] The star is metal rich, with nearly the same mass,[5] radius, and luminosity[6] as the Sun.
Orbiting this star is a giant planet and a brown dwarf (HD 4113 C); the latter has been directly imaged. It also has a co-moving stellar companion, designated component B, which is a red dwarf with a class of M0–1V at an angular separation of 43″. This angle is equivalent to a projected separation of 2,000 AU.[2]
The most recent parameters for HD 4113 C as of 2022 come from a combination of data from radial velocity, astrometry, and imaging, showing that it is about 52 times the mass of Jupiter, and on an eccentric orbit with a semi-major axis of about 50.4 AU and an orbital period of about 348 years.[4]
Gaia DR3 A was invoked but never defined (see the help page).Cheetham2018 was invoked but never defined (see the help page).Gaia DR3 B was invoked but never defined (see the help page).Feng2022 was invoked but never defined (see the help page).AguileraGómez2018 was invoked but never defined (see the help page).Simbad was invoked but never defined (see the help page).