| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 03h 09m 36.74277s [1] |
| Declination | +29° 04′ 37.4872″ [1] |
| Apparent magnitude (V) | 5.72 [2] |
| Characteristics | |
| Spectral type | B8 III [3] |
| U−B color index | –0.15 [2] |
| B−V color index | +0.115±0.005 [4] |
| Astrometry | |
| Radial velocity (Rv) | −2.0±4.3 [4] km/s |
| Proper motion (μ) |
RA: +19.192
[1]
mas/
yr Dec.: −12.057 [1] mas/ yr |
| Parallax (π) | 3.5853 ± 0.1194 mas [1] |
| Distance | 910 ± 30
ly (279 ± 9 pc) |
| Absolute magnitude (MV) | −1.75 [4] |
| Details | |
| Mass | 4.1 [5] M☉ |
| Radius | 9.49+0.32 −0.56 [1] R☉ |
| Luminosity | 326±13 [1] L☉ |
| Surface gravity (log g) | 2.948±0.023 [5] cgs |
| Temperature | 7,961+246 −128 [1] K |
| Rotational velocity (v sin i) | 196±10 [5] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
55 Arietis is a single
[7]
star in the northern
zodiac
constellation of
Aries. 55 Arietis is the
Flamsteed designation. It is faintly visible to the naked eye as a dim, blue-white hued point of light with an
apparent visual magnitude of 5.72.
[2] Based upon an annual
parallax shift of 3.6
mas,
[1] it is approximately 910
light-years (280
parsecs) distant from Earth, give or take a 30 light-year
margin of error. Eggen (1995) listed it as a
proper motion candidate for membership in the
IC 2391 supercluster.
[8] It may be a
runaway star, having a
peculiar velocity of 25.9+3.9
−6.1 km/s relative to its neighbors.
[9]
The spectrum of this star matches a B-type giant with a stellar classification of B8 III. [3] It has a high rate of spin, showing a projected rotational velocity of 196 km/s. [5] The star has 4.1 [5] times the mass of the Sun but 9.5 [1] times the Sun's radius. It is radiating 326 [1] times as much luminosity as the Sun from its photosphere at an effective temperature of 7,961 K. [1]
- ^ a b c d e f g h i j k l Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode: 1978A&AS...34....1N.
- ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode: 1969AJ.....74..375C, doi: 10.1086/110819.
- ^ a b c Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv: 1108.4971, Bibcode: 2012AstL...38..331A, doi: 10.1134/S1063773712050015, S2CID 119257644.
- ^ a b c d e Huang, W.; et al. (2010), "A Stellar Rotation Census of B Stars: From ZAMS to TAMS", The Astrophysical Journal, 722 (1): 605–619, arXiv: 1008.1761, Bibcode: 2010ApJ...722..605H, doi: 10.1088/0004-637X/722/1/605, S2CID 118532653.
- ^ "55 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-07-31.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv: 0806.2878, Bibcode: 2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Eggen, Olin J. (December 1995), "Reality Tests of Superclusters in the Young Disk Population", Astronomical Journal, 110: 2862, Bibcode: 1995AJ....110.2862E, doi: 10.1086/117734.
- ^ Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv: 1007.4883, Bibcode: 2011MNRAS.410..190T, doi: 10.1111/j.1365-2966.2010.17434.x, S2CID 118629873.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 03h 09m 36.74277s [1] |
| Declination | +29° 04′ 37.4872″ [1] |
| Apparent magnitude (V) | 5.72 [2] |
| Characteristics | |
| Spectral type | B8 III [3] |
| U−B color index | –0.15 [2] |
| B−V color index | +0.115±0.005 [4] |
| Astrometry | |
| Radial velocity (Rv) | −2.0±4.3 [4] km/s |
| Proper motion (μ) |
RA: +19.192
[1]
mas/
yr Dec.: −12.057 [1] mas/ yr |
| Parallax (π) | 3.5853 ± 0.1194 mas [1] |
| Distance | 910 ± 30
ly (279 ± 9 pc) |
| Absolute magnitude (MV) | −1.75 [4] |
| Details | |
| Mass | 4.1 [5] M☉ |
| Radius | 9.49+0.32 −0.56 [1] R☉ |
| Luminosity | 326±13 [1] L☉ |
| Surface gravity (log g) | 2.948±0.023 [5] cgs |
| Temperature | 7,961+246 −128 [1] K |
| Rotational velocity (v sin i) | 196±10 [5] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
55 Arietis is a single
[7]
star in the northern
zodiac
constellation of
Aries. 55 Arietis is the
Flamsteed designation. It is faintly visible to the naked eye as a dim, blue-white hued point of light with an
apparent visual magnitude of 5.72.
[2] Based upon an annual
parallax shift of 3.6
mas,
[1] it is approximately 910
light-years (280
parsecs) distant from Earth, give or take a 30 light-year
margin of error. Eggen (1995) listed it as a
proper motion candidate for membership in the
IC 2391 supercluster.
[8] It may be a
runaway star, having a
peculiar velocity of 25.9+3.9
−6.1 km/s relative to its neighbors.
[9]
The spectrum of this star matches a B-type giant with a stellar classification of B8 III. [3] It has a high rate of spin, showing a projected rotational velocity of 196 km/s. [5] The star has 4.1 [5] times the mass of the Sun but 9.5 [1] times the Sun's radius. It is radiating 326 [1] times as much luminosity as the Sun from its photosphere at an effective temperature of 7,961 K. [1]
- ^ a b c d e f g h i j k l Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode: 1978A&AS...34....1N.
- ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode: 1969AJ.....74..375C, doi: 10.1086/110819.
- ^ a b c Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv: 1108.4971, Bibcode: 2012AstL...38..331A, doi: 10.1134/S1063773712050015, S2CID 119257644.
- ^ a b c d e Huang, W.; et al. (2010), "A Stellar Rotation Census of B Stars: From ZAMS to TAMS", The Astrophysical Journal, 722 (1): 605–619, arXiv: 1008.1761, Bibcode: 2010ApJ...722..605H, doi: 10.1088/0004-637X/722/1/605, S2CID 118532653.
- ^ "55 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-07-31.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv: 0806.2878, Bibcode: 2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Eggen, Olin J. (December 1995), "Reality Tests of Superclusters in the Young Disk Population", Astronomical Journal, 110: 2862, Bibcode: 1995AJ....110.2862E, doi: 10.1086/117734.
- ^ Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv: 1007.4883, Bibcode: 2011MNRAS.410..190T, doi: 10.1111/j.1365-2966.2010.17434.x, S2CID 118629873.