| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Aries |
| Right ascension | 01h 48m 10.92137s [1] |
| Declination | +16° 57′ 19.8483″ [1] |
| Apparent magnitude (V) | 5.86 [2] |
| Characteristics | |
| Evolutionary stage | main sequence [3] |
| Spectral type | B9.5 V [4] |
| Astrometry | |
| Radial velocity (Rv) | +5.7±1.9 [5] km/s |
| Proper motion (μ) |
RA: +65.608
[1]
mas/
yr Dec.: −29.291 [1] mas/ yr |
| Parallax (π) | 11.4613 ± 0.1511 mas [1] |
| Distance | 285 ± 4
ly (87 ± 1 pc) |
| Details | |
| Mass | 2.83
[6] or 2.48±0.02 [3] M☉ |
| Radius | 2.2 [7] R☉ |
| Luminosity | 40.4±1.9 [3] L☉ |
| Surface gravity (log g) | 4.47±0.14 [6] cgs |
| Temperature | 10,913±371 [6] K |
| Rotational velocity (v sin i) | 33 [6] km/s |
| Age | 257 [6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
4 Arietis is a single [9] star in the northern constellation of Aries, the ram. 4 Arietis is the Flamsteed designation. It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.86. [2] The star has an annual parallax shift of 11.46±0.15 mas, [1] which is equivalent to a distance of 285 light-years (87 parsecs) from the Sun. It is moving further from the Earth with a heliocentric radial velocity of +6 km/s. [5]
This is a B-type main sequence star with a stellar classification of B9.5 V. [4] It is 257 [6] million years old and is spinning with a projected rotational velocity of 33 [6] km/s. The star has more than double the mass of the Sun and around 2.2 [7] times the Sun's radius. It is radiating 40 [3] times the Sun's luminosity from its photosphere at an effective temperature of 10,913 K. [6]
- ^ a b c d e f 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 Oja, T. (April 1983), "UBV photometry of FK4 and FK4 supplement stars", Astronomy and Astrophysics Supplement Series, 52: 131–134, Bibcode: 1983A&AS...52..131O.
- ^ a b c d Zorec, J.; Royer, F.; Asplund, Martin; Cassisi, Santi; Ramirez, Ivan; Melendez, Jorge; Bensby, Thomas; Feltzing, Sofia (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics, 537: A120, arXiv: 1201.2052, Bibcode: 2012A&A...537A.120Z, doi: 10.1051/0004-6361/201117691, S2CID 55586789.
- ^ 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 de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv: 1208.3048, Bibcode: 2012A&A...546A..61D, doi: 10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ a b c d e f g h David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv: 1501.03154, Bibcode: 2015ApJ...804..146D, doi: 10.1088/0004-637X/804/2/146, S2CID 33401607.
- ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (2) (Third ed.): 521–524, arXiv: astro-ph/0012289, Bibcode: 2001A&A...367..521P, doi: 10.1051/0004-6361:20000451, S2CID 425754.
- ^ "4 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 14 April 2019.
- ^ 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.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Aries |
| Right ascension | 01h 48m 10.92137s [1] |
| Declination | +16° 57′ 19.8483″ [1] |
| Apparent magnitude (V) | 5.86 [2] |
| Characteristics | |
| Evolutionary stage | main sequence [3] |
| Spectral type | B9.5 V [4] |
| Astrometry | |
| Radial velocity (Rv) | +5.7±1.9 [5] km/s |
| Proper motion (μ) |
RA: +65.608
[1]
mas/
yr Dec.: −29.291 [1] mas/ yr |
| Parallax (π) | 11.4613 ± 0.1511 mas [1] |
| Distance | 285 ± 4
ly (87 ± 1 pc) |
| Details | |
| Mass | 2.83
[6] or 2.48±0.02 [3] M☉ |
| Radius | 2.2 [7] R☉ |
| Luminosity | 40.4±1.9 [3] L☉ |
| Surface gravity (log g) | 4.47±0.14 [6] cgs |
| Temperature | 10,913±371 [6] K |
| Rotational velocity (v sin i) | 33 [6] km/s |
| Age | 257 [6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
4 Arietis is a single [9] star in the northern constellation of Aries, the ram. 4 Arietis is the Flamsteed designation. It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.86. [2] The star has an annual parallax shift of 11.46±0.15 mas, [1] which is equivalent to a distance of 285 light-years (87 parsecs) from the Sun. It is moving further from the Earth with a heliocentric radial velocity of +6 km/s. [5]
This is a B-type main sequence star with a stellar classification of B9.5 V. [4] It is 257 [6] million years old and is spinning with a projected rotational velocity of 33 [6] km/s. The star has more than double the mass of the Sun and around 2.2 [7] times the Sun's radius. It is radiating 40 [3] times the Sun's luminosity from its photosphere at an effective temperature of 10,913 K. [6]
- ^ a b c d e f 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 Oja, T. (April 1983), "UBV photometry of FK4 and FK4 supplement stars", Astronomy and Astrophysics Supplement Series, 52: 131–134, Bibcode: 1983A&AS...52..131O.
- ^ a b c d Zorec, J.; Royer, F.; Asplund, Martin; Cassisi, Santi; Ramirez, Ivan; Melendez, Jorge; Bensby, Thomas; Feltzing, Sofia (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics, 537: A120, arXiv: 1201.2052, Bibcode: 2012A&A...537A.120Z, doi: 10.1051/0004-6361/201117691, S2CID 55586789.
- ^ 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 de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv: 1208.3048, Bibcode: 2012A&A...546A..61D, doi: 10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ a b c d e f g h David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv: 1501.03154, Bibcode: 2015ApJ...804..146D, doi: 10.1088/0004-637X/804/2/146, S2CID 33401607.
- ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (2) (Third ed.): 521–524, arXiv: astro-ph/0012289, Bibcode: 2001A&A...367..521P, doi: 10.1051/0004-6361:20000451, S2CID 425754.
- ^ "4 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 14 April 2019.
- ^ 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.