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The Sun is the brightest star as viewed from Earth, at −26.78 mag. The second brightest is Sirius at −1.46 mag. For comparison, the brightest non-stellar objects in the Solar System have maximum brightnesses of: the Moon −12.7 mag [1] Venus −4.92 mag; Jupiter −2.94 mag; Mars −2.94 mag; Mercury −2.48 mag; Saturn −0.55 mag [2]
The bright star at top center is Alhena, which forms a cross-shaped asterism with the Winter Triangle. With an apparent magnitude of −1.46, Sirius is the brightest star in the night sky, almost twice as bright as the second-brightest star, Canopus. [72]
Canopus is the brightest star in the southern constellation of Carina and the second-brightest star in the night sky. It is also designated α Carinae, which is romanized (transliterated) to Alpha Carinae. With a visual apparent magnitude of −0.74, it is outshone only by Sirius.
2nd brightest star in night sky [46] −0.55: planet Saturn: seen from Earth maximum brightness near opposition and perihelion when the rings are angled toward Earth [42] −0.3: Halley's comet: seen from Earth Expected apparent magnitude at 2061 passage −0.27: star system Alpha Centauri AB: seen from Earth Combined magnitude (3rd brightest ...
Sigma Sagittarii has a spectrum matching a stellar classification of B2.5 V, [4] which indicates this is a B-type main-sequence star.Its total luminosity is 3300 [16] times that of the Sun while it has a surface temperature of 18,890 K. [9] X-ray emission has been detected from this star, which has an estimated X-ray luminosity of 1.2 × 10 28 erg s −1.
The Bright Star Catalogue, which is a star catalogue listing all stars of apparent magnitude 6.5 or brighter, or roughly every star visible to the naked eye from Earth, contains 9,096 stars. [1] The most voluminous modern catalogues list on the order of a billion stars, out of an estimated total of 200 to 400 billion in the Milky Way .
Lambda Scorpii is a triple star system and the second-brightest object in the constellation of Scorpius. It is formally named Shaula; Lambda Scorpii is its Bayer designation, which is Latinised from λ Scorpii and abbreviated Lambda Sco or λ Sco. With an apparent visual magnitude of 1.62, it is one of the brightest stars in the night sky.
Gamma Lyrae, Latinised from γ Lyrae, and formally named Sulafat / ˈ s uː l ə f æ t /, [9] [10] is the second-brightest star in the northern constellation of Lyra. With an apparent visual magnitude of 3.3, [4] it is readily visible to the naked eye. Parallax measurements yield an estimated distance of 620 light-years (190 parsecs) from the Sun.