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NGC 2204 is an open cluster of stars in the Canis Major constellation. It was discovered by the German-English astronomer William Herschel on 6 February 1785. [5] The cluster has an integrated visual magnitude of 8.6 and spans a diameter of 10.0′. Resolving the individual member stars is a challenge with a 10 to 12-inch amateur telescope. [3]
NGC 2359 (also known as Thor's Helmet) is an emission nebula [3] in the constellation Canis Major. The nebula is approximately 3,670 parsecs (11.96 thousand light years) away and 30 light-years in size. The central star is the Wolf-Rayet star WR7, an extremely hot star thought to be in a brief pre-supernova stage of evolution.
Tau Canis Majoris is a Beta Lyrae-type eclipsing multiple star system that varies from magnitude 4.32 to 4.37 over 1.28 days. [71] Its four main component stars are hot O-type stars, with a combined mass 80 times that of the Sun and shining with 500,000 times its luminosity, but little is known of their individual properties.
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HD 45184 is a star in the southern constellation of Canis Major. It is a yellow-hued star near the lower limit of visibility to the naked eye with an apparent visual magnitude of 6.37. [ 2 ] The star is located at a distance of 71.65 light years from the Sun based on parallax . [ 1 ]
NGC 2362 is a relatively young 4–5 million years in age [3] but is devoid of star-forming gas and dust, indicating that the star formation process has come to a halt. [4] It is a massive open cluster, with more than 500 solar masses , [ 3 ] an estimated 100-150 member stars, and an additional 500 forming a halo around the cluster.
The genus Canis (Carl Linnaeus, 1758) was published in the 10th edition of Systema Naturae [2] and included the dog-like carnivores: the domestic dog, wolves, coyotes and jackals. All species within Canis are phylogenetically closely related with 78 chromosomes and can potentially interbreed. [4]
HD 47667 is a single [9] star in the southern constellation of Canis Major.It is visible to the naked eye with an apparent visual magnitude of 4.832. [2] The estimated distance to this star, based upon an annual parallax shift of 3.30 ± 0.35 mas, [1] is roughly 1,000 light years.