Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aries |
30 Arietis A | |
Right ascension | 02h 37m 00.5235s[1] |
Declination | +24° 38′ 49.9880″[1] |
30 Arietis B | |
Right ascension | 02h 36m 57.7449s[2] |
Declination | +24° 38′ 53.0026″[2] |
Characteristics | |
Spectral type | F5 V / F6 V[3] |
B−V color index | 0.410 / 0.510[3] |
Astrometry | |
30 Arietis A | |
Proper motion (μ) | RA: 136.862±0.137[1] mas/yr Dec.: −15.188±0.141[1] mas/yr |
Parallax (π) | 22.1261 ± 0.0726 mas[1] |
Distance | 147.4 ± 0.5 ly (45.2 ± 0.1 pc) |
30 Arietis B | |
Proper motion (μ) | RA: 141.411±0.083[2] mas/yr Dec.: −10.677±0.086[2] mas/yr |
Parallax (π) | 22.3641 ± 0.0516 mas[2] |
Distance | 145.8 ± 0.3 ly (44.7 ± 0.1 pc) |
Orbit[4][5] | |
Primary | 30 Arietis A |
Companion | 30 Arietis BC |
Period (P) | 34000 yr |
Semi-major axis (a) | 40" (1670 AU) |
Orbit[5] | |
Primary | 30 Arietis B |
Companion | 30 Arietis C |
Period (P) | 80 yr |
Semi-major axis (a) | 22.3 AU |
Orbit[5] | |
Primary | 30 Arietis B |
Companion | 30 Arietis Bb |
Period (P) | 335.1 ± 2.5 d (0.917 ± 0.007 yr) |
Semi-major axis (a) | 0.995 ± 0.012 AU |
Eccentricity (e) | 0.289 ± 0.092 |
Inclination (i) | 4.14+0.96 −0.90°[6]° |
Details | |
30 Arietis A | |
Mass | 1.31 ± 0.04[3] M☉ |
Radius | 1.37 ± 0.03[3] R☉ |
Age | 860±630[5] Myr |
30 Arietis Ba | |
Mass | 1.16 ± 0.04[3] M☉ |
Radius | 1.13 ± 0.03[3] R☉ |
Age | 910±830[5] Myr |
Details | |
30 Arietis Bb | |
Mass | 147+41 −29[6] MJup |
Other designations | |
Database references | |
SIMBAD | A |
B | |
Exoplanet Archive | data |
Data sources: | |
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
30 Arietis (abbreviated 30 Ari) is a 6th-apparent-magnitude multiple star system[4] in the constellation of Aries. 30 Arietis is the Flamsteed designation. 30 Arietis A and B are separated by 38.1″ or about 1,500 AU at a distance of 130 light years away. The main components of both systems are both binaries with a composite spectra belonging to F-type main-sequence stars, meaning they are fusing hydrogen in their cores. The 30 Arietis system is 910 million years old, one fifth the age of the Sun.
Gaia DR2 A
was invoked but never defined (see the help page).Gaia DR2 B
was invoked but never defined (see the help page).Guenther2009
was invoked but never defined (see the help page).Clavin2015
was invoked but never defined (see the help page).Roberts2015
was invoked but never defined (see the help page).Kiefer2020
was invoked but never defined (see the help page).