30 Arietis: Difference between revisions

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	'''30 Arietis''' (sometimes abbreviated '''30 Ari''') is a 6th-] ]<ref name="Clavin2015"/> in the ] ]. 30 Arietis A and B are separated by 38.1" or about 1500 ] at a distance of 130 ]s away. ~~Both~~ ~~stars~~ are ]s, meaning they are ] ] in their cores.<ref name="Guenther2009"/> 30 Arietis A is itself a ] with an orbital period of 1.1 days.<ref>{{cite journal\|title=A Search for Spectroscopic Binaries from Published Radial Velocity Data\|author=Morbey, C. L.; Brosterhus, E. B.\|journal=Publications of the Astronomical Society of the Pacific\|volume=86\|issue=512\|pages=455\|year=1974\|doi=10.1086/129630\|bibcode=1974PASP...86..455M}}</ref> The 30 Arietis system is 910 million years old, one fifth the age of the ].		'''30 Arietis''' (sometimes abbreviated '''30 Ari''') is a 6th-] ]<ref name="Clavin2015"/> in the ] ]. 30 Arietis A and B are separated by 38.1" or about 1500 ] at a distance of 130 ]s away. The main components of both systems are ]s, meaning they are ] ] in their cores.<ref name="Guenther2009"/> 30 Arietis A is itself a ] with an orbital period of 1.1 days.<ref>{{cite journal\|title=A Search for Spectroscopic Binaries from Published Radial Velocity Data\|author=Morbey, C. L.; Brosterhus, E. B.\|journal=Publications of the Astronomical Society of the Pacific\|volume=86\|issue=512\|pages=455\|year=1974\|doi=10.1086/129630\|bibcode=1974PASP...86..455M}}</ref> The 30 Arietis system is 910 million years old, one fifth the age of the ].

	==Planetary system==		==Planetary system==

Revision as of 10:54, 29 March 2015

30 Arietis ABCD
Observation data Epoch J2000 Equinox J2000
Constellation	Aries
30 Arietis A
Right ascension	02 37 00.52
Declination	+24° 38′ 50.0″
Apparent magnitude (V)	6.48
30 Arietis B
Right ascension	02 36 57.74
Declination	+24° 38′ 53.0″
Apparent magnitude (V)	7.09
Astrometry
30 Arietis A
Radial velocity (R_v)	14.9 km/s
Proper motion (μ)	RA: 136.96 ± 0.60 mas/yr Dec.: –14.69 ± 0.43 mas/yr
Parallax (π)	23.95 ± 0.59 mas
Distance	136 ± 3 ly (42 ± 1 pc)
Absolute magnitude (M_V)	3.46
30 Arietis B
Radial velocity (R_v)	17.2 km/s
Proper motion (μ)	RA: 150.75 ± 0.75 mas/yr Dec.: –12.79 ± 0.54 mas/yr
Parallax (π)	24.52 ± 0.68 mas
Distance	133 ± 4 ly (41 ± 1 pc)
Absolute magnitude (M_V)	4.11
Characteristics
Spectral type	F5 V / F6 V
U−B color index	0.02
B−V color index	0.410 / 0.510
Details
30 Arietis A
Mass	1.31 ± 0.04 `M`_☉
Radius	1.37 ± 0.03 `R`_☉
Luminosity	3.6 `L`_☉
Temperature	6300 ± 100 K
Age	(0.91 ± 0.03) × 10 years
30 Arietis B
Mass	1.16 ± 0.04 `M`_☉
Radius	1.13 ± 0.03 `R`_☉
Luminosity	1.964 `L`_☉
Temperature	6424 ± 180 K
Metallicity	0.07 ± 0.2
Age	(0.91 ± 0.03) × 10 years
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
SIMBAD	data
Exoplanet Archive	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)

30 Arietis (sometimes abbreviated 30 Ari) is a 6th-apparent-magnitude quadruple star in the constellation Aries. 30 Arietis A and B are separated by 38.1" or about 1500 AU at a distance of 130 light years away. The main components of both systems are F-type main-sequence stars, meaning they are fusing hydrogen in their cores. 30 Arietis A is itself a spectroscopic binary with an orbital period of 1.1 days. The 30 Arietis system is 910 million years old, one fifth the age of the Sun.

Planetary system

On November 27, 2009, the discovery of a very massive planet was announced to be orbiting 30 Arietis B at a distance of about 1 AU.

The 30 Arietis B planetary system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥9.88 ± 0.94 M_J	0.995 ± 0.012	335.1 ± 2.5	0.289 ± 0.092	—	—

References

^ van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry for A Vizier catalog entry for B
^ Guenther, E. W.; et al. (2009). "A substellar component orbiting the F-star 30 Arietis B". Astronomy and Astrophysics. 507 (3): 1659–1665. arXiv:0912.4619. Bibcode:2009A&A...507.1659G. doi:10.1051/0004-6361/200912112.
Whitney Clavin (2015). "Planet 'Reared' by Four Parent Stars | NASA". NASA. Retrieved 4 March 2015.
Morbey, C. L.; Brosterhus, E. B. (1974). "A Search for Spectroscopic Binaries from Published Radial Velocity Data". Publications of the Astronomical Society of the Pacific. 86 (512): 455. Bibcode:1974PASP...86..455M. doi:10.1086/129630.{{cite journal}}: CS1 maint: multiple names: authors list (link)
Jean Schneider (2011). "Notes for star 30 Ari B". Extrasolar Planets Encyclopaedia. Retrieved 3 October 2011.

External links

Constellation of Aries

Stars

Bayer	α (Hamal) β (Sheratan) γ (Mesarthim) δ (Botein) ε ζ η θ ι κ λ μ ν ξ ο π ρ ρ ρ σ τ τ
Flamsteed	1 4 7 10 11 14 15 16 19 20 21 23 26 27 29 30 31 33 35 36 38 39 (Lilii Borea) 40 41 (Bharani) 47 49 50 51 52 53 54 55 56 59 60 62 64 65 66 54 Cet 85 Cet
Variable	TZ UX VZ (16 Tri)
HR	577 728 803 952 999
HD	12661 20367
Other	BD+20°307 HIP 14810 HAT-P-25 Teegarden's Star WASP-11/HAT-P-10 WD 0145+234

Exoplanets	α Arietis b HD 12661 b c HIP 14810 b c d Teegarden's Star b c WASP-11b/HAT-P-10b

Galaxies

NGC	677 680 691 694 695 716 765 770 772 781 803 817 820 821 871 877 900 901 903 904 918 935 938 972 990 992 1024 1134 1156
Other	1ES 0229+200 3C 79 4C +28.07 AO 0235+164 IC 167 IC 1801 PSO J0309+27 Segue 2 UGC 2140

Galaxy clusters	MS 0302+17

Astronomical events	GRB 060218

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