Alpha Crateris

Alpha Crateris
Denumire Bayer Alpha Crateris
Denumire Flamsteed 7 Crateris
Date de observație
Constelație Cupa
Magnitudine aparentă
Magnitudine aparentă vizuală 4,07[1]
Magnitudine absolută (Mv) 5,17
Clasificare spectrală K1 III
Tipul de variabilă
Declinație -18° 17′ 55.62″[1]
Ascensie dreaptă 10h 59m 46.4647s[1]
Diametru angular
Adjectiv
Astrometrie
Mișcare proprie (μ) AD: -462,38 msa/an
Dec.: 129,11 msa/an
Viteză radială (Rv)
Mișcare proprie (μ)
Paralaxă (π) 18,71
Eroare paralaxă 1,03
Distanța față de Terra 174 al
( pc)
Distanța față de centrul Căii Lactee
Perioadă galactică
Orbită
Companion/pereche
Perioadă orbitală
Axă semimajoră
Excentricitate
Înclinare
Detalii
Masă 2,5[2] M☉
Rază 6,5 R☉
Luminozitate 25[2] L☉
Metalicitate
Gravitație la suprafață 3,1 [2]
Rotație stelară
Vârstă
Temperatură 4,620[3]
Diametru D☉
Viteză rotațională km/s
Masă M☉
Rază R☉
Luminozitate L☉
Metalicitate
Gravitație la suprafață
Rotație stelară
Vârstă
Temperatură
Diametru D☉
Alte denumiri
7 Crt
NLTT 25942
LTT 4040
HD 95272
BD-17° 3273
HIP 53740
HR 4287
FK5 1283
SAO 156375.
Unitățile SI și condiții de temperatură și presiune normale dacă nu s-a specificat altfel.
Modifică date / text Consultați documentația formatului

Alpha Crateris este o stea din constelația Cupa. Numele său tradițional este Alkes, care provine din arăbescul الكاس (alkās) sau الكأس (alka's), cupa.

Alpha Crateris aparține clasei spectrale K1, are magnitudinea aparentă 4,07 și se află la 174 ani-lumină depărtare de Pământ.

Referințe

  1. ^ a b c „Alpha Crateris”. SIMBAD Query. Accesat în . 
  2. ^ a b c Edvardsson, B. (), „Spectroscopic surface gravities and chemical compositions for 8 nearby single sub-giants”, Astronomy and Astrophysics, 190 (1-2): 148–166, Bibcode:1988A&A...190..148E 
  3. ^ Melo, C. H. F.; et al. (), „On the nature of lithium-rich giant stars. Constraints from beryllium abundances”, Astronomy and Astrophysics, 439 (1): 227–235, arXiv:astro-ph/0504133 Accesibil gratuit, Bibcode:2005A&A...439..227M, doi:10.1051/0004-6361:20041805 

Surse externe


v • d • m
Stele din Cupa
Bayer
α (Alkes) • β • γ • δ • ε • ζ • η • θ • ι • κ • λ • ψ
Flamsteed
Listă


Coordonate: Harta cerului 10h 59m 46.4647s, −18° 17′ 55.62″

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