Global InformationGliese 412 information
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ursa Major |
| Gliese 412 A | |
| Right ascension | 11h 05m 22.3101s[1] |
| Declination | +43° 31′ 51.0404″[1] |
| Apparent magnitude (V) | 8.68[2] |
| Gliese 412 B | |
| Right ascension | 11h 05m 30.8856s[3] |
| Declination | +43° 31′ 17.8843″[3] |
| Apparent magnitude (V) | 14.45[4] |
| Characteristics | |
| Spectral type | M1.0V[2]/M6.0V[4] |
| U−B color index | +1.16/—[5] |
| B−V color index | +1.54[5]/2.08[6] |
| Astrometry | |
| Gliese 412 A | |
| Radial velocity (Rv) | +64.9 ± 0.9[7] km/s |
| Proper motion (μ) | RA: −4410.43±0.78[8] mas/yr Dec.: 942.93±0.70[8] mas/yr |
| Parallax (π) | 203.8876 ± 0.0332 mas[9] |
| Distance | 15.997 ± 0.003 ly (4.9047 ± 0.0008 pc) |
| Absolute magnitude (MV) | 10.34[10] |
| Gliese 412 B | |
| Proper motion (μ) | RA: −4339.891±0.167 mas/yr Dec.: 960.780±0.162 mas/yr |
| Parallax (π) | 203.8323 ± 0.0500 mas[11] |
| Distance | 16.001 ± 0.004 ly (4.906 ± 0.001 pc) |
| Absolute magnitude (MV) | 16.05[10] |
| Details | |
| GJ 412 A | |
| Mass | 0.48[10] M☉ |
| Radius | 0.38[12] R☉ |
| Surface gravity (log g) | 4.90[13] cgs |
| Temperature | 3,687[13]/ K |
| Metallicity [Fe/H] | -0.43[13] dex |
| Rotational velocity (v sin i) | <3[14] km/s |
| Age | 3[12] Gyr |
| GJ 412 B | |
| Mass | 0.10[10] M☉ |
| Radius | 0.13[12] R☉ |
| Temperature | 2,700[6] K |
| Metallicity [Fe/H] | −0.32[12] dex |
| Rotational velocity (v sin i) | 7.7±1.7[14] km/s |
| Other designations | |
BD+44°2051, GJ 412, CCDM J11055+4332AB, WDS J11055+4332AB[15][2]
A: Gaia DR2 778947814402405120, HIP 54211, SAO 43609, G 176-11, LAL 21258, LFT 757, LHS 38, LTT 12976, NLTT 26245[2] B: WX UMa, Gaia DR2 778947608243864320, G 176-12, LFT 758, LHS 39, LTT 12977, NLTT 26247[4] | |
| Database references | |
| SIMBAD | The system |
| A | |
| B | |
  Gliese 412 Location of Gliese 412 in the constellation Ursa Major | |
Gliese 412 is a pair of stars that share a common proper motion through space and are thought to form a binary star system. The pair have an angular separation of 31.4″ at a position angle of 126.1°.[16] They are located 15.8 light-years distant from the Sun in the constellation Ursa Major. Both components are relatively dim red dwarf stars.
The two stellar components of this system have a projected separation of about 152 AU, and an estimated orbital semimajor axis of 190 AU.[17] The primary has about 48% of the Sun's mass, while the secondary is only 10%.[10] The primary has a projected rotation velocity at the equator of less than 3 km/s; the secondary has a rotation velocity of 7.7±1.7 km/s.[14]
The primary star was monitored for radial velocity (RV) variations caused by a Jupiter-mass companion in a short-period orbit. It displayed no significant excess of RV variation that could be attributed to a planet.[18] A search of the system using near-infrared speckle interferometry also failed to detect a companion orbiting at distances of 1–10 AU.[19] Nor has a brown dwarf been detected orbiting within this system.[20]
The space velocity components of this system are U = 141, V = –7 and W = 7. They are members of the halo population of the Milky Way galaxy.[14]
- ^ a b Cite error: The named reference
Gaia DR2 for Awas invoked but never defined (see the help page). - ^ a b c d Cite error: The named reference
Simbad for Awas invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Gaia DR2 for Bwas invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
Simbad for Bwas invoked but never defined (see the help page). - ^ a b Nicolet, B. (1978). "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System". Observatory. Bibcode:1978ppch.book.....N.
- ^ a b Casagrande, Luca; et al. (September 2008). "M dwarfs: effective temperatures, radii and metallicities". Monthly Notices of the Royal Astronomical Society. 389 (2): 585–607. arXiv:0806.2471. Bibcode:2008MNRAS.389..585C. doi:10.1111/j.1365-2966.2008.13573.x. S2CID 14353142.
- ^ Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick (eds.). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. Bibcode:1967IAUS...30...57E.
- ^ a b Cite error: The named reference
van Leeuwen2007was invoked but never defined (see the help page). - ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d e "The 100 nearest star systems". Research Consortium On Nearby Stars. 2009-09-14. Retrieved 2009-09-14.
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d Cite error: The named reference
apj804_1_64was invoked but never defined (see the help page). - ^ a b c Soubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. (March 2008). "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants". Astronomy and Astrophysics. 480 (1): 91–101. arXiv:0712.1370. Bibcode:2008A&A...480...91S. doi:10.1051/0004-6361:20078788. S2CID 16602121.
- ^ a b c d Delfosse, Xavier; Forveille, Thierry; Perrier, Christian; Mayor, Michel (March 1998). "Rotation and chromospheric activity in field M dwarfs". Astronomy and Astrophysics. 331: 581–595. Bibcode:1998A&A...331..581D.
- ^ Cite error: The named reference
Simbadwas invoked but never defined (see the help page). - ^ Gould, Andrew; Chanamé, Julio (February 2004). "New Hipparcos-based Parallaxes for 424 Faint Stars". The Astrophysical Journal Supplement Series. 150 (2): 455–464. arXiv:astro-ph/0309001. Bibcode:2004ApJS..150..455G. doi:10.1086/381147. S2CID 8494577.
- ^ Reid, I. Neill; Gizis, John E. (June 1997). "Low-Mass Binaries and the Stellar Luminosity Function". Astronomical Journal. 113: 2246–2269. Bibcode:1997AJ....113.2246R. doi:10.1086/118436.
- ^ Endl, Michael; et al. (September 2006). "Exploring the Frequency of Close-in Jovian Planets around M Dwarfs". The Astrophysical Journal. 649 (1): 436–443. arXiv:astro-ph/0606121. Bibcode:2006ApJ...649..436E. doi:10.1086/506465. S2CID 14461746.
- ^ Leinert, C.; et al. (September 1997). "A search for companions to nearby southern M dwarfs with near-infrared speckle interferometry". Astronomy and Astrophysics. 325: 159–166. Bibcode:1997A&A...325..159L.
- ^ Oppenheimer, B. R.; et al. (April 2001). "A Coronagraphic Survey for Companions of Stars within 8 Parsecs". The Astronomical Journal. 121 (4): 2189–2211. arXiv:astro-ph/0101320. Bibcode:2001AJ....121.2189O. doi:10.1086/319941. S2CID 119092593.