If the R.A. is positive then its eastwards. The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. There's no register feature and no need to give an email address if you don't need to. It should not be taken as though the star is moving closer or further away from us. [13][14], Variable star in constellation Canis Major, "Anchor Points for the MK System of Spectral Classification", Monthly Notices of the Royal Astronomical Society, Commonwealth Scientific and Industrial Research Organisation, https://en.wikipedia.org/w/index.php?title=Omicron2_Canis_Majoris&oldid=952877575, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, This page was last edited on 24 April 2020, at 14:41. [9] This star is classified as an Alpha Cygni-type variable star that undergoes periodic non-radial pulsations, which cause its brightness to cycle from magnitude +2.93 to +3.08 over a 24.44 day interval. The location of the star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Parallax of the star is given as 0.21200 which gives a calculated distance to DZ Canis Majoris of 15385.06 light years from the Earth or 4716.98 parsecs. Mach 1 is the speed of sound, Mach 2 is twice the speed of sound. [8], Omicron2 Canis Majoris is one of the most luminous stars known, as it radiates about 220,000[6] times as much luminosity as the Sun from its outer envelope at a temperature of 15,500 K.[6] At this heat, the star is glowing with the blue-white hue of a B-type star. In fact, its optical neighbor, the orange supergiant ο1 Canis Majoris has a much higher likelihood of 23.1% based upon its proper motion being a closer match to the motion of the cluster. All messages will be reviewed before being displayed. U.G. The two letters at the start identify that the star is a variable star. When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. The star is roughly 972,940,186.23 Astronomical Units from the Earth/Sun give or take a few. The star is a rotating Alpha2 Canum Venatic variable type which means that its size changes over time. 12 Canis Majoris has an apparent magnitude of 6.07 which is how bright we see the star from Earth. Proper Motion details the movements of these stars and are measured in milliarcseconds. is the number of times that the star is from the Earth compared to the Sun. The star is moving 1.98 milliarcseconds/year towards the north and -1.02 milliarcseconds/year east if we saw them in the horizon. A name is preferred even if its a random made up one by yourself. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified. Given this information, we can calculate the surface temperature of the star with the following equation, whereby T = temperature (the unknown), L = luminosity = 270,000 solar, and R = radius = 1480 solar: Comments may be merged or altered slightly such as if an email address is given in the main body of the comment. For DZ Canis Majoris, the location is 07 16 59.3295830214 and -15 18 25.436502497 . [1], This is a massive supergiant star with a stellar classification of B3 Ia,[3] indicating that, at the age of around 7 million years,[7] it has exhausted the supply of hydrogen at its core and is now undergoing nuclear fusion of helium to generate energy. The source of the information if it has a Hip I.D. The Variable Type is usually named after the first star of that type to be spotted. It has been known to produce widely incorrect figures. EZ Canis Majoris Radius 17 Canis Majoris Luminosity Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. The star has a B-V Colour Index of -0.15 which means the star's temperature is about 13,674 Kelvin. Using the 2007 distance, the star is roughly 49,822,916.78 Astronomical Units from the Earth/Sun give or take a few. Flamsteed designations such as 12 Canis Majoris are named after the creator, Sir John Flamsteed. An Astronomical Unit is the distance between Earth and the Sun. If you used the 1997 Parallax value, you would get an absolute magnitude of -0.49 If you used the 2007 Parallax value, you would get an absolute magnitude of -0.85. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it. Apparent Magnitude is also known as Visual Magnitude. [1][8], In the catalogue of stars in the Calendarium of Al Achsasi Al Mouakket, this star was designated Thanih al Adzari (ثاني ألعذاري - thaanii al-aðārii), which was translated into Latin as Secunda Virginum, meaning the second virgin. 12 Canis Majoris Colour and Temperature Based on the star's spectral type of B7II/III, 12 Canis Majoris's colour and type is blue giant star. It is purely that the distance was recalculated. The figure is derived at by using the formula from SDSS rather than peer reviewed papers. All messages will be reviewed before being displayed. Cookies / About Us / Contact Us / Twitter / Facebook, http://simbad.u-strasbg.fr/simbad/sim-id?Ident=dz%20canis%20majoris. Hipparcos was a E.S.A. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. has done some calculations as to how long it will take going at differing speeds. is the number of times that the star is from the Earth compared to the Sun. . More details on objects' alternative names can be found at. The smaller the magnitude, the brighter the star. 12 Canis Majoris estimated radius has been calculated as being 2.09 times bigger than the Sun. [8] It has about 21[7] times the mass of the Sun and 65[6] times the Sun's radius. [3] It has an apparent visual magnitude of 3.043,[2] making it one of the brighter members of the constellation. VY Canis Majoris is estimated to have surface temperatures of around 3,200C (5,800F). Proper Motion details the movements of these stars and are measured in milliarcseconds.
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