Wikimedia lysartikel From Wikipedia, the free encyclopedia
Hier volg ’n lys van die 50 helderste sterre (tot by ’n magnitude van 2) volgens hulle maksimum, totale of gekombineerde skynbare magnitude (helderheid soos van die Aarde af gesien). Hoewel baie van die helderste sterre bekende dubbel- of veelvoudige sterre is en relatief na aan die Aarde is, lyk hulle met die blote oog soos enkelsterre. Dié lys kombineer die magnitudes van helder individuele komponente. Die meeste van die eiename op die lys word deur die Internasionale Astronomiese Unie se sternaamwerkgroep (WGSN) erken,[1] behalwe dié van Regor.
Die Son is die helderste ster soos van die Aarde af gesien. Die skynbare magnitudes van die helderste sterre kan ook vergelyk word met niestellêre voorwerpe in die Sonnestelsel. Dié voorwerpe se skynbare magnitudes groter as die helderste ster, Sirius (-1,46), s’n is (buiten die Son): Maan (-12,7), Venus (-4,89), Jupiter (-2,94), Mars (-2,91), Mercurius (-2,45) en Saturnus (-0,49).
Die presiese volgorde van die visuele helderheid van sterre is nie volkome vasgestel nie, om drie redes:
Rang | Visuele magnitude (mV) | Eienaam[1] | Bayer-naam | Afstand (ligjare) | Spektraalklas |
---|---|---|---|---|---|
1 | −26,74 | Son | 0,000015813 | G2 V | |
2 | −1,46 | Sirius | α CMa | 8,6 | A0mA1 Va, DA2 |
3 | −0,74 | Canopus | α Car | 310 | A9 II |
4 | −0,27 (0,01 + 1,33) | Rigil Kentaurus & Toliman | α Cen | 4,4 | G2 V, K1 V |
5 | −0,05 | Arcturus | α Boo | 37 | K0 III |
6 | 0,03 (-0,02–0,07var) | Vega | α Lyr | 25 | A0 Va |
7 | 0,08 (0,03–0,16var) | Capella | α Aur | 42 | K0 III, G1 III |
8 | 0,13 (0,05–0,18var) | Rigel | β Ori | 860 | B8 Ia |
9 | 0,34 | Procyon | α CMi | 11 | F5 IV-V |
10 | 0,46 (0,40–0,46var) | Achernar | α Eri | 140 | B6 Vep |
11 | 0,50 (0,2–1,2var) | Betelgeuse | α Ori | 640 | M1-M2 Ia-ab |
12 | 0,61 | Hadar | β Cen | 350 | B1 III |
13 | 0,76 | Altair | α Aql | 17 | A7 V |
14 | 0,76 (1,33 + 1,73) | Acrux | α Cru | 320 | B0.5 IV, B1 V |
15 | 0,86 (0,75–0,95var) | Aldebaran | α Tau | 65 | K5 III |
16 | 0,96 (0,6–1,6var) | Antares | α Sco | 600 | M1.5 Iab-Ib, B2.5 V |
17 | 0,97 (0,97–1,04var) | Spica | α Vir | 260 | B1 III-IV, B2 V |
18 | 1,14 | Pollux | β Gem | 34 | K0 III |
19 | 1,16 | Fomalhaut | α PsA | 25 | A3 V |
20 | 1,25 (1,21–1,29var) | Deneb | α Cyg | 2,600 | A2 Ia |
21 | 1,25 (1,23–1,31var) | Mimosa | β Cru | 350 | B0.5 III, B2 V |
22 | 1,39 | Regulus | α Leo | 77 | B8 IVn |
23 | 1,50 | Adhara | ε CMa | 430 | B2 II |
24 | 1,62 | Shaula | λ Sco | 700 | B2 IV |
25 | 1,62 (1,98 + 2,97) | Castor | α Gem | 52 | A1 V, Am |
26 | 1,64 | Gacrux | γ Cru | 88 | M3,5 III |
27 | 1,64 | Bellatrix | γ Ori | 240 | B2 III |
28 | 1,65 | Elnath | β Tau | 130 | B7 III |
29 | 1,69 | Miaplacidus | β Car | 110 | A1 III |
30 | 1,69 (1,64–1,74var) | Alnilam | ε Ori | 2,000 | B0 Ia |
31 | 1,72 (1,81–1,87var + 4,27) | Regor* | γ1,2 Vel | 840 | WC8, O7,5III |
32 | 1,74 | Alnair | α Gru | 100 | B6 V |
33 | 1,77 | Alioth | ε UMa | 81 | A1 III-IVp kB9 |
34 | 1,77 | Alnitak | ζ Ori A | 820 | O9.5 Iab, B1 IV, B0 III |
35 | 1,79 | Dubhe | α UMa | 120 | K0 III, F0 V |
36 | 1,80 | Mirfak | α Per | 590 | F5 Ib |
37 | 1,82 | Wezen | δ CMa | 1,800 | F8 Ia |
38 | 1,84 | Sargas | θ Sco | 270 | F0 II |
39 | 1,85 | Kaus Australis | ε Sgr | 140 | B9.5 III |
40 | 1,86 | Avior | ε Car | 630 | K3 III, B2 Vp |
41 | 1,86 | Alkaid | η UMa | 100 | B3 V |
42 | 1,90 (1,89–1,94var) | Menkalinan | β Aur | 100 | A1mIV+A1mIV |
43 | 1,91 | Atria | α TrA | 420 | K2 IIb-IIIa |
44 | 1,92 | Alhena | γ Gem | 100 | A1,5 IV+ |
45 | 1,94 | Peacock | α Pav | 180 | B3 V |
46 | 1,96 (1,99–2,39var + 5.57) | Alsephina | δ Vel | 80 | A1 Va(n), F7,5 V |
47 | 1,98 | Mirzam | β CMa | 500 | B1 II-III |
48 | 2,00 | Alphard | α Hya | 180 | K3 II-III |
49 | 1,98 (1,86–2,13var) | Polaris | α UMi | 430 | F7 Ib |
50 | 2,00 | Hamal | α Ari | 66 | K1 IIIb |
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