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physical object > naked eye object > naked eye star > Sirius
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Sirius
(alpha CMa, Dog Star, HR 2491)
subjectfact 
Siriushas declination -16 42 582001-09-27 09:31:28.0
has right ascension 6 45 8.92001-09-27 09:31:28.0
has spectral type A1Vmhas source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:31:28.0
has V magnitude -1.462001-09-27 09:31:28.0
has distance 8.6 light-yearshas source: Croswell, K. 1995 The Alchemy of the Heavens, Anchor Books, 2001-09-27 09:31:28.0
is a part of Canis Majorhas URL: http://www.seds.org/Maps/Const/Data/canismajor_tab.html, 2001-09-27 09:31:28.0
has synonym alpha CMahas source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:31:28.0
has synonym Dog Star2001-09-27 09:31:28.0
has synonym HR 24912001-09-27 09:31:28.0
has B-V magnitude 0.002001-09-27 09:31:28.0
has orbital period 49.9 yearshas source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:31:28.0
has definition The brightest star in the sky. Its companion (Sirius B) is a white dwarf of about 0.96 Msun but only about 0.03 Rsun, the nearest white dwarf to Earth.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:31:28.0
is an instance of A star2001-09-27 09:31:28.0
is an instance of dwarf2001-09-27 09:31:28.0
is an instance of naked eye star2001-09-27 09:31:28.0
is an instance of binary starhas source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:31:28.0
dwarfhas symbol d2001-09-27 09:30:52.0
has luminosity class V2001-09-27 09:30:52.0
A starhas color white2001-09-27 09:30:46.0
has surface temperature 10000 K2001-09-27 09:30:46.0
has absorption line H I2001-09-27 09:30:46.0
naked eye starhas been observed for many centuries2001-09-27 09:30:25.0
is usually part of asterism2001-09-27 09:30:25.0
is a part of celestial sphere2001-09-27 09:30:25.0
is a part of Milky Way2001-09-27 09:30:25.0
has apparent magnitude brighter than 52001-09-27 09:30:25.0
binary starhas number of stars 22001-09-27 09:30:54.0
starhas star surface temperature2001-09-27 09:30:25.0
has B magnitude2001-09-27 09:30:25.0
has U magnitude2001-09-27 09:30:25.0
has position on celestial sphere from the point of view of Earth2001-09-27 09:30:25.0
has parallax from the point of view of Earth's orbit2001-09-27 09:30:25.0
has proper motion2001-09-27 09:30:24.0
has radiation at surface which is diffused out from the hotter core2001-09-27 09:30:24.0
has energy source gravitational contraction and or fusion2001-09-27 09:30:24.0
has energy production which takes place primarily within the core2001-09-27 09:30:24.0
has surface density which depends on luminosity class2001-09-27 09:30:24.0
has absolute magnitude2001-09-27 09:30:25.0
has age2001-09-27 09:30:25.0
has catalog star catalog2001-09-27 09:30:25.0
has material hydrogen, helium2001-09-27 09:30:24.0
has velocity determined from proper motion and radial velocity2001-09-27 09:30:25.0
has mass greater than 0.08 the sun's mass2001-09-27 09:30:24.0
star systemhas abundance half the stars in the solar neighborhood are members of star systems2001-09-27 09:30:54.0
celestial bodyhas spectra2001-09-27 09:30:09.0
physical objecthas location or center of gravity2001-09-27 09:27:27.0
has angular momentum2001-09-27 09:27:27.0
has momentum2001-09-27 09:27:27.0
has temperature2001-09-27 09:27:27.0
has volume2001-09-27 09:27:27.0
has extent2001-09-27 09:27:27.0

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