30 Arietis

30 Arietis

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]
Distance147.4 ± 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]
Distance145.8 ± 0.3 ly
(44.7 ± 0.1 pc)
Orbit[4][5]
Primary30 Arietis A
Companion30 Arietis BC
Period (P)34000 yr
Semi-major axis (a)40"
(1670 AU)
Orbit[5]
Primary30 Arietis B
Companion30 Arietis C
Period (P)80 yr
Semi-major axis (a)22.3 AU
Orbit[5]
Primary30 Arietis B
Companion30 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
Mass1.31 ± 0.04[3] M
Radius1.37 ± 0.03[3] R
Age860±630[5] Myr
30 Arietis Ba
Mass1.16 ± 0.04[3] M
Radius1.13 ± 0.03[3] R
Age910±830[5] Myr
Details
30 Arietis Bb
Mass147+41
−29
[6] MJup
Other designations
CCDM 02370+2439, WDS 02370+2439

30 Arietis A
BD+24°376, HD 16246, HIP 12189, HR 765, SAO 75471

30 Arietis B
BD+24°375, HD 16232, HIP 12184, HR 764, SAO 75470
Database references
SIMBADA
B
Exoplanet Archivedata
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.

  1. ^ a b c d e Cite error: The named reference Gaia DR2 A was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Gaia DR2 B was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Guenther2009 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Clavin2015 was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference Roberts2015 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Kiefer2020 was invoked but never defined (see the help page).