Wolf 359

Wolf 359
Localizarea stelei
Localizarea stelei
Denumire Bayer
Denumire Flamsteed
Date de observație
Constelație Leul
Magnitudine aparentă 13,54
Magnitudine aparentă vizuală
Magnitudine absolută (Mv) 16,614[1]  Modificați la Wikidata
Clasificare spectrală M6.5 Ve
Tipul de variabilă Stea eruptivă[2][3][4]  Modificați la Wikidata
Declinație
Ascensie dreaptă 10h 56m 28.99s
Diametru angular
Adjectiv
Astrometrie
Mișcare proprie (μ) AD:  msa/an
Dec.:  msa/an
Viteză radială (Rv)
Mișcare proprie (μ)
Paralaxă (π)
Eroare paralaxă
Distanța față de Terra 7,8 ani-lumină al
( pc)
Distanța față de centrul Căii Lactee
Perioadă galactică
Orbită
Companion/pereche
Perioadă orbitală
Axă semimajoră
Excentricitate
Înclinare
Detalii
Masă 0,11 Masă solară[5]  Modificați la Wikidata
Rază 0,144 Rază solară[5]  Modificați la Wikidata
Luminozitate 0,0009 - 0.0011[10] L L
Metalicitate
Gravitație la suprafață
Rotație stelară
Vârstă
Temperatură 2.800 K
Diametru 0,16 D D
Viteză rotațională km/s
Masă M
Rază R
Luminozitate L
Metalicitate
Gravitație la suprafață
Rotație stelară
Vârstă
Temperatură
Diametru D
Alte denumiri
CN Leonis, CN Leo, GJ 406, G 045-020, LTT 12923, LFT 750, LHS 36,[6] GCTP 2553.
Unitățile SI și condiții de temperatură și presiune normale dacă nu s-a specificat altfel.

Coordonate: Harta cerului 10h 56m 28.99s, +07° 00′ 52″ Wolf 359 este o stea din constelația Leul. Este una dintre cele mai apropiate stele față de Sistemul Solar, doar sistemul Alpha Centauri (inclusiv Proxima Centauri) și Steaua lui Barnard sunt cunoscute a fi mai aproape. Apropierea sa, la o distanță de aproximativ 7,8 ani-lumină de Pământ, a făcut ca această stea să fie menționată în numeroase lucrări de ficțiune.
Are o magnitudine aparentă de 13,54 și nu poate fi văzută decât cu un telescop mare. Vârsta sa este estimată la cel puțin un miliard de ani.
Are o masă de 0,09 M (masa Soarelui).

Observații

Mișcarea proprie a stelei a fost măsurată, pentru prima oară, în 1917 de către astronomul german Max Wolf. Observațiile sale au fost publicate în 1919 în Catalogul Wolf, unde el a clasat-o pe poziția a 359-a.[7]. Puternica mișcare proprie a stelei a suscitat atenția astronomilor, întrucât mișcarea proprie a acesteia poate indica faptul că ar putea fi situată în apropierea Sistemului nostru Solar. Este steaua cea mai puțin masivă dintre stelele cunoscute până la descoperirea stelei VB 10 în 1944[8].

Note

  1. ^ The Mass-Activity Relationships in M and K Dwarfs. I. Stellar Parameters of Our Sample of M and K Dwarfs[*][[The Mass-Activity Relationships in M and K Dwarfs. I. Stellar Parameters of Our Sample of M and K Dwarfs (articol științific)|​]]  Verificați valoarea |titlelink= (ajutor)
  2. ^ General catalogue of variable stars: Version GCVS 5.1[*][[General catalogue of variable stars: Version GCVS 5.1 (scholarly article)|​]]  Verificați valoarea |titlelink= (ajutor)
  3. ^ https://www.star-facts.com/wolf-359/  Lipsește sau este vid: |title= (ajutor)
  4. ^ Rapid magnetic flux variability on the flare star CN Leonis[*][[Rapid magnetic flux variability on the flare star CN Leonis (scientific article published in Astronomy and Astrophysics)|​]]  Verificați valoarea |titlelink= (ajutor)
  5. ^ a b The M-dwarf Ultraviolet Spectroscopic Sample. I. Determining Stellar Parameters for Field Stars 
  6. ^ „V* CN Leo -- Flare Star”. SIMBAD. Centre de Données astronomiques de Strasbourg. Accesat în . 
  7. ^ en Wolf M., Katalog von 1053 staerker bewegten Fixsternen, in Veroeffentlichungen der Badischen Sternwarte zu Heidelberg , 1919, volumul 7, numărul 10, pp. 195-219, bibcode 1919 VeHei...7..195W [1]
  8. ^ en G. Van Biesbroeck, The star of lowest known luminosity, in The Astronomical Journal , pp.61–62, 1944, august, doi 10.1086/105801, bibcode 1944 AJ.....51...61V, volumul 51 [2]

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