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Sirius - Povijest promjena
2026-08-04T06:14:58Z
Povijest promjena ove stranice na wikiju
MediaWiki 1.42.3
https://enciklopedija.cc/index.php?title=Sirius&diff=482435&oldid=prev
WikiSysop: bny
2022-04-14T09:00:14Z
<p>bny</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Starija inačica</td>
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WikiSysop
https://enciklopedija.cc/index.php?title=Sirius&diff=20842&oldid=prev
WikiSysop: Bot: Automatski unos stranica
2021-07-31T08:34:44Z
<p>Bot: Automatski unos stranica</p>
<p><b>Nova stranica</b></p><div><!--'''Sirius'''-->{{dz}}<br />
{{Starbox begin |<br />
name=Sirius A/B }}<br />
{{Starbox image |<br />
image=[[Datoteka:Position_Alpha_Cma.png|250px]] |<br />
caption=Položaj Siriusa. }}<br />
{{Starbox observe |<br />
epoch=J2000 |<br />
constell=[[Veliki pas]] |<br />
ra=06h 45m 08.9s |<br />
dec=-16&deg; 42' 58" |<br />
appmag_v=-1.43/8.44 }}<br />
{{Starbox character |<br />
class=A1V/[[White dwarf|DA2]] |<br />
b-v=0.00/-0.03 |<br />
u-b=-0.05/-1.04 |<br />
variable=None }}<br />
{{Starbox astrometry |<br />
radial_v=-7.6 |<br />
prop_mo_ra=-546.01 |<br />
prop_mo_dec=-1223.08 |<br />
parallax=380.02 |<br />
p_error=1.28 |<br />
dist_ly=8.58 |<br />
dist_pc=2.631 |<br />
absmag_v=1.47/11.35 }}<br />
{{Starbox detail|<br />
age=2-3 &times; 10<sup>8</sup> |<br />
metal=1,000%/? |<br />
mass=2.14/0.98 |<br />
radius=1.68/0.008 |<br />
rotation= |<br />
luminosity=26.1/0.0024 |<br />
temperature=9,900/25,200 }}<br />
{{Starbox catalog |<br />
names=&alpha; Canis Majoris, 9 CMa, [[Henry Draper catalogue|HD]] 48915, [[Harvard Revised catalogue|HR]] 2491, [[Bonner Durchmusterung|BD]] -16&deg;1591, [[Henry-Lee Giclas|Gl]] 119-052, [[General Catalogue of Trigonometric Parallaxes|GCTP]] 1577.00 A/B, [[Gliese-Jahreiss catalogue|GJ]] 244 A/B, [[Luyten Half-Second catalogue|LHS]] 219, ADS 5423, LTT 2638, [[Hipparcos catalogue|HIP]] 32349. }}<br />
{{Starbox end}}<br />
'''Sirius''' (α CMa / α Canis Majoris / Alfa Canis Majoris, [[latinski|lat]]. ''Sīrĭus'') je najsjajnija [[zvijezda]] noćnog neba. Nalazi se u [[Zviježđe|zviježđu]] [[Veliki pas]] (''Canis Maior''). [[Prividna magnituda|Prividna magnituda]] Siriusa je -1,46! Jedna od zvijezda najbližih Zemlji, udaljena 8,6 svjetlosnih godina. Masa joj je oko 2 puta veća od Sunčeve, promjer 1,711 puta veći, sjaj 25,4 puta veći, a površinska temperatura oko 9940 K. Dvojna je zvijezda s pratiocem, prvim otkrivenim bijelim patuljkom (Sirius b), kojega je na temelju poremećaja Siriusova položaja predvidio [[Friedrich Wilhelm Bessel]] (1844), a snimio [[Alvan Clark]] (1862). Sirius B je od Siriusa A udaljen 31,5 astronomskih jedinica, s periodom ophoda od 50 godina. Masa mu je oko 0,978 mase Sunca, promjer 0,0084, sjaj 0,026, a površinska temperatura oko 25 200 K. Kalendar u Starom Egiptu (oko 2500 godina prije Krista) temeljio se na pojavi izlaska Siriusa (Sopdeta) neposredno prije izlaska Sunca, što se događalo oko ljetnog suncostaja i bilo najava poplava Nila.<br />
<br />
{{Mrva-zvijezda}}<br />
[[Kategorija:Zvijezde]]<br />
[[Kategorija:Veliki pas]]</div>
WikiSysop