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GJ 1245

April 14, 2024

GJ 1245 (Gliese 1245) is a double star with components G 208-44 and G 208-45, 14 light-years away, relatively close to the Solar System. G 208-44 is itself a closer double star made up of two red dwarfs, while G 208-45 is also a red dwarf. GJ 1245 is the 37th closest stellar system to the Solar System, located in the constellation Cygnus.[4] GJ 1245 A and B are active flare stars,[5] and the pair are collectively designated V1581 Cygni.[6]

V1581 Cygni

A blue band light curve for a flare of V1581 Cygni. The left-most point shows a 1 sigma error bar. Adapted from Cristaldi and Rodonò (1976)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 53m 54.492s
Declination +44° 24′ 53.41″
Apparent magnitude (V) 13.41 / 14.01 / 16.75
Characteristics
Spectral type M5.5 / M6 / M5.5
Variable type UV Cet[2]
Astrometry
Proper motion (μ) RA: 349.363±0.056[3] mas/yr
Dec.: −480.322±0.054[3] mas/yr
Parallax (π)214.5745 ± 0.0476 mas[3]
Distance15.200 ± 0.003 ly
(4.660 ± 0.001 pc)
Absolute magnitude (MV)15.31 / 15.72 / 18.46
Details
Luminosity0.000084 / 0.000048 L☉
Age~300 Myr
Other designations
GJ 1245, WDS J19539+4425, V1581 Cygni
G 208-44: NLTT 48414, LHS 3494, 2MASS J19535443+4424541
G 208-45: NLTT 48415, LHS 3495, 2MASS J19535508+4424550
Database references
SIMBADThe system
A
C
B
GJ 1245
Location of GJ 1245 in the constellation Cygnus

The largest of the three stars, G208-44 A (GJ 1245 A) is only 11% the Sun's mass. Of the other two stars, G 208-44 B (GJ 1245 C), is closest to star A at 8 AU away; it is 7% of the Sun's Mass. The third star, GJ 1245 B, is 33 AU away from star A, and is 10% of the Sun's Mass; it would appear as bright as Venus does from Earth when viewed from star A.

See also edit

References edit

  1. ^ Cristaldi, S.; Rodonò, M. (April 1976). "Discovery of Flare Activity in the Visual Binary G 208-44/45". Astronomy and Astrophysics. 48: 165. Bibcode:1976A&A....48..165C. Retrieved 28 December 2021.
  2. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  3. ^ a b c 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.
  4. ^ "The One Hundred Nearest Star Systems". RECONS. Retrieved 2016-08-21.
  5. ^ Lurie, John C.; Davenport, James R. A.; Hawley, Suzanne L.; Wilkinson, Tessa D.; Wisniewski, John P.; Kowalski, Adam F.; Hebb, Leslie (2015). "Kepler Flares III: Stellar Activity on GJ 1245A and B". The Astrophysical Journal. 800 (2): 95. arXiv:1412.6109. Bibcode:2015ApJ...800...95L. doi:10.1088/0004-637X/800/2/95. S2CID 51773906.
  6. ^ Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (1978). "63rd Name-List of Variable Stars". Information Bulletin on Variable Stars. 1414: 1. Bibcode:1978IBVS.1414....1K.

Further reading edit

  • Harrington, R. S.; Dahn, C. C.; Kallarakal, V. V.; Guetter, H. H.; Riepe, B. Y.; Walker, R. L.; Pier, J. R.; Vrba, F. J.; Luginbuhl, C. B.; Harris, H. C.; Ables, H. D. (1993). "U.S. Naval Observatory photographic parallaxes - List IX". Astronomical Journal. 105 (4): 1571–1580. Bibcode:1993AJ....105.1571H. doi:10.1086/116537.
  • Henry, Todd J.; Subasavage, John P.; Brown, Misty A.; Beaulieu, Thomas D.; Jao, Wei-Chun; Hambly, Nigel C. (2004). "The Solar Neighborhood. X. New Nearby Stars in the Southern Sky and Accurate Photometric Distance Estimates for Red Dwarfs". The Astronomical Journal. 128 (5): 2460–2473. arXiv:astro-ph/0408240. Bibcode:2004AJ....128.2460H. doi:10.1086/425052. S2CID 15759789.
  • Smart, R. L.; Ioannidis, G.; Jones, H. R. A.; Bucciarelli, B.; Lattanzi, M. G. (2010). "Cool dwarfs stars from the Torino Observatory Parallax Program". Astronomy and Astrophysics. 514: A84. arXiv:1003.1465. Bibcode:2010A&A...514A..84S. doi:10.1051/0004-6361/200913424. S2CID 17961025.
  • Dittmann, Jason A.; Irwin, Jonathan M.; Charbonneau, David; Berta-Thompson, Zachory K. (2014). "Trigonometric Parallaxes for 1507 Nearby Mid-to-late M Dwarfs". The Astrophysical Journal. 784 (2): 156. arXiv:1312.3241. Bibcode:2014ApJ...784..156D. doi:10.1088/0004-637X/784/2/156. S2CID 18789867. Table with parallaxes.

External links edit


 

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April 14, 2024
1245, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, august, 2016, learn, . This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources GJ 1245 news newspapers books scholar JSTOR August 2016 Learn how and when to remove this template message GJ 1245 Gliese 1245 is a double star with components G 208 44 and G 208 45 14 light years away relatively close to the Solar System G 208 44 is itself a closer double star made up of two red dwarfs while G 208 45 is also a red dwarf GJ 1245 is the 37th closest stellar system to the Solar System located in the constellation Cygnus 4 GJ 1245 A and B are active flare stars 5 and the pair are collectively designated V1581 Cygni 6 V1581 CygniA blue band light curve for a flare of V1581 Cygni The left most point shows a 1 sigma error bar Adapted from Cristaldi and Rodono 1976 1 Observation dataEpoch J2000 Equinox J2000Constellation CygnusRight ascension 19h 53m 54 492sDeclination 44 24 53 41 Apparent magnitude V 13 41 14 01 16 75CharacteristicsSpectral type M5 5 M6 M5 5Variable type UV Cet 2 AstrometryProper motion m RA 349 363 0 056 3 mas yr Dec 480 322 0 054 3 mas yrParallax p 214 5745 0 0476 mas 3 Distance15 200 0 003 ly 4 660 0 001 pc Absolute magnitude MV 15 31 15 72 18 46DetailsLuminosity0 000084 0 000048 L Age 300 MyrOther designationsGJ 1245 WDS J19539 4425 V1581 CygniG 208 44 NLTT 48414 LHS 3494 2MASS J19535443 4424541G 208 45 NLTT 48415 LHS 3495 2MASS J19535508 4424550Database referencesSIMBADThe systemACBGJ 1245Location of GJ 1245 in the constellation CygnusThe largest of the three stars G208 44 A GJ 1245 A is only 11 the Sun s mass Of the other two stars G 208 44 B GJ 1245 C is closest to star A at 8 AU away it is 7 of the Sun s Mass The third star GJ 1245 B is 33 AU away from star A and is 10 of the Sun s Mass it would appear as bright as Venus does from Earth when viewed from star A Contents 1 See also 2 References 3 Further reading 4 External linksSee also editList of nearest stars and brown dwarfsReferences edit Cristaldi S Rodono M April 1976 Discovery of Flare Activity in the Visual Binary G 208 44 45 Astronomy and Astrophysics 48 165 Bibcode 1976A amp A 48 165C Retrieved 28 December 2021 Samus N N Durlevich O V et al 2009 VizieR Online Data Catalog General Catalogue of Variable Stars Samus 2007 2013 VizieR On line Data Catalog B GCVS Originally Published in 2009yCat 102025S 1 Bibcode 2009yCat 102025S a b c Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp 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 The One Hundred Nearest Star Systems RECONS Retrieved 2016 08 21 Lurie John C Davenport James R A Hawley Suzanne L Wilkinson Tessa D Wisniewski John P Kowalski Adam F Hebb Leslie 2015 Kepler Flares III Stellar Activity on GJ 1245A and B The Astrophysical Journal 800 2 95 arXiv 1412 6109 Bibcode 2015ApJ 800 95L doi 10 1088 0004 637X 800 2 95 S2CID 51773906 Kholopov P N Kukarkina N P Perova N B 1978 63rd Name List of Variable Stars Information Bulletin on Variable Stars 1414 1 Bibcode 1978IBVS 1414 1K Further reading editHarrington R S Dahn C C Kallarakal V V Guetter H H Riepe B Y Walker R L Pier J R Vrba F J Luginbuhl C B Harris H C Ables H D 1993 U S Naval Observatory photographic parallaxes List IX Astronomical Journal 105 4 1571 1580 Bibcode 1993AJ 105 1571H doi 10 1086 116537 Henry Todd J Subasavage John P Brown Misty A Beaulieu Thomas D Jao Wei Chun Hambly Nigel C 2004 The Solar Neighborhood X New Nearby Stars in the Southern Sky and Accurate Photometric Distance Estimates for Red Dwarfs The Astronomical Journal 128 5 2460 2473 arXiv astro ph 0408240 Bibcode 2004AJ 128 2460H doi 10 1086 425052 S2CID 15759789 Smart R L Ioannidis G Jones H R A Bucciarelli B Lattanzi M G 2010 Cool dwarfs stars from the Torino Observatory Parallax Program Astronomy and Astrophysics 514 A84 arXiv 1003 1465 Bibcode 2010A amp A 514A 84S doi 10 1051 0004 6361 200913424 S2CID 17961025 Dittmann Jason A Irwin Jonathan M Charbonneau David Berta Thompson Zachory K 2014 Trigonometric Parallaxes for 1507 Nearby Mid to late M Dwarfs The Astrophysical Journal 784 2 156 arXiv 1312 3241 Bibcode 2014ApJ 784 156D doi 10 1088 0004 637X 784 2 156 S2CID 18789867 Table with parallaxes External links edithttp jumk de astronomie near stars v1581 cygni shtml http www answers com topic list of nearest stars cat travel http www richweb f9 co uk astro nearby stars htm nbsp This article about a red dwarf is a stub You can help Wikipedia by expanding it vte nbsp This binary or multiple star system related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title GJ 1245 amp oldid 1196518220, wikipedia, wiki, book, books, library,

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