51 Arietis

Short description: Star in the constellation Aries

51 Arietis  Observation data
Equinox J2000.0]] (ICRS)

Constellation | Aries
Right ascension |  03h 02m 26.02628s[1]
Declination | +26° 36′ 33.2602″[1]
Apparent magnitude (V) | 6.623 ± 0.005[2]
Characteristics
Spectral type | G8 V[3]
B−V color index | 0.715[4]
Astrometry
Radial velocity (Rv)| +9.5±0.1[5] km/s
Proper motion (μ)|  RA: +233.122[1] mas/yr
Dec.: –168.438[1] mas/yr
Parallax (π)| 47.1551 ± 0.0603[1] mas
Distance| 69.17 ± 0.09 ly
(21.21 ± 0.03 pc)
Absolute bolometric
magnitude (Mbol)| 4.85±0.07[2]
Details
Mass| 1.04[2] M☉
Radius| 0.99[2] R☉
Luminosity| 0.92[6] L☉
Surface gravity (log g)| 4.46[6] cgs
Temperature| 5,666[6] K
Metallicity [Fe/H]| 0.15[6] dex
Rotational velocity (v sin i)| 4.08[4] km/s
Age| 1.40[5] Gyr
Other designations

51 Ari, BD+26°503, GJ 120.2, HD 18803, HIP 14150, SAO 75696[7]

Database references
SIMBAD| data
ARICNS| data

51 Arietis is a star in the northern constellation of Aries. 51 Arietis is the Flamsteed designation. It is a dim, yellow-hued star – a challenge to view with the naked eye, having an apparent visual magnitude of 6.6.[2] Based upon parallax measurements, the star is located at an estimated distance of 67.3 light-years (20.6 parsecs) from the Sun.[8] It is receding from the Earth with a heliocentric radial velocity of +9.5 km/s,[5] and is a member of the IC 2391 moving group.[3]

This is an ordinary G-type main sequence star with a stellar classification of G8 V.[3] Similar to the Sun, it has 1.04 times the mass and 0.99 times the Sun's radius.[2] It is 1.4[5] billion years old with a leisurely rotation rate, showing a projected rotational velocity of 4 km/s.[4] The atmospheric metallicity is higher than solar.[6] The star radiates 92%[6] of the Sun's luminosity from its photosphere at an effective temperature of 5,666 K.[6] This heat gives it the golden-hued glow of a G-type star.[9]

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Fuhrmann, Klaus (February 2008), "Nearby stars of the Galactic disc and halo - IV", Monthly Notices of the Royal Astronomical Society 384 (1): 173–224, 176, doi:10.1111/j.1365-2966.2007.12671.x, Bibcode: 2008MNRAS.384..173F.
3. ↑ 3.0 3.1 3.2 Montes, D. et al. (November 2001), "Late-type members of young stellar kinematic groups - I. Single stars", Monthly Notices of the Royal Astronomical Society 328 (1): 45–63, doi:10.1046/j.1365-8711.2001.04781.x, Bibcode: 2001MNRAS.328...45M.
4. ↑ 4.0 4.1 4.2 Martínez-Arnáiz, R. et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter", Astronomy and Astrophysics 520: A79, doi:10.1051/0004-6361/200913725, Bibcode: 2010A&A...520A..79M, http://eprints.ucm.es/37826/1/davidmontes17libre.pdf, retrieved 2018-11-04.
5. ↑ 5.0 5.1 5.2 5.3 Casagrande, L. et al. (June 2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy and Astrophysics 530: A138, doi:10.1051/0004-6361/201016276, Bibcode: 2011A&A...530A.138C.
6. ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 Takeda, Yoichi (April 2007), "Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database", Publications of the Astronomical Society of Japan 59 (2): 335–356, doi:10.1093/pasj/59.2.335, Bibcode: 2007PASJ...59..335T.
7. ↑ "LTT 10989 -- High proper-motion Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=51+Arietis, retrieved 2012-08-16.
8. ↑ van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
9. ↑ "The Colour of Stars", Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html, retrieved 2012-01-16

## External links

* sky-map.org/
* Image 51 Arietis

* v
* t
* e

Constellation of Aries

* List of stars in Aries
* Aries in Chinese astronomy

Stars|

| Bayer|

* α (Hamal)
* β (Sheratan)
* γ (Mesarthim)
* δ (Botein)
* ε
* ζ
* η
* θ
* ι
* κ
* λ
* μ
* ν
* ξ
* ο
* π
* ρ1
* ρ2
* ρ3
* σ
* τ1
* τ2

|

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|

* R
* X
* RV
* RW
* RX
* SS
* TT
* UX
* VW
* VY
* VZ (16 Tri)
* WX
* XY

HR|

* 577
* 578
* 601
* 609
* 624
* 644
* 676
* 711
* 723
* 728
* 803
* 856
* 902
* 916
* 924
* 931
* 945
* 946
* 948
* 952
* 971
* 999

HD|

* 12661
* 19445
* 19549
* 20367

Other|

* BD+20°307
* HAT-P-25
* HIP 14810
* L 1159-16
* L1448 IRS 3
* L1455 FIR
* LkHα 264
* PSR B0301+19
* Teegarden's Star
* WASP-11
* WD 0145+234

| Exoplanets|

* 30 Arietis Bb
* BD+20 594b
* HD 12661 b
* c
* HD 20367 b
* HIP 14810 b
* c
* d
* Teegarden b
* Teegarden c

|

| Nebulae|

* L1448
* L1455
* MBM 12

|

Galaxies|

| NGC|

* 671
* 673
* 675
* 677
* 678
* 680
* 683
* 691
* 694
* 695
* 697
* 711
* 716
* 719
* 722
* 765
* 770
* 772
* 774
* 776
* 781
* 786
* 792
* 794
* 803
* 810
* 817
* 820
* 821
* 870
* 871
* 876
* 877
* 882
* 900
* 901
* 903
* 904
* 915
* 916
* 918
* 919
* 924
* 927
* 928
* 932
* 935
* 938
* 962
* 972
* 976
* 984
* 990
* 992
* 1012
* 1024
* 1028
* 1029
* 1030
* 1036
* 1054
* 1056
* 1088
* 1109
* 1111
* 1112
* 1115
* 1116
* 1117N
* 1117S
* 1127
* 1134
* 1156
* 1166
* 1168
* 1236

|

Other|

* AO 0235+164
* 3C 79
* CTA 21
* 1ES 0229+200
* IC 1801
* IC 1854
* PKS 0201+113
* PKS 0202+149
* QSO J0237+2848
* RBS 0413
* Segue 2
* UGC 2140

| Galaxy clusters|

* Abell 399
* Abell 401
* MS 0302+17

|

| Astronomical events|

* GRB 040924
* GRB 060218

|

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