 30 Arietis star system hierarchy | |
| 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.
- ^ a b c d e Cite error: The named reference
Gaia DR2 Awas invoked but never defined (see the help page). - ^ a b c d e Cite error: The named reference
Gaia DR2 Bwas invoked but never defined (see the help page). - ^ a b c d e f Cite error: The named reference
Guenther2009was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Clavin2015was invoked but never defined (see the help page). - ^ a b c d e Cite error: The named reference
Roberts2015was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Kiefer2020was invoked but never defined (see the help page).