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. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Alkaphrah are provided in the following table:Alkaphrah is a visual double star which can be observed only with the help of very large telescopes. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. Video Software we use: https://amzn.to/2KpdCQF Ad-free videos. Alkaphrah Facts.
U.G. The description is based on the spectral class. Kappa Ceti: Faible: Homonymie: Muscida: Faible: Homonymie: Votre aide est la bienvenue pour corriger les liens, présents dans l'article, vers les pages d'homonymie Pi Ursae Majoris ⇒ Quelques explications pour effectuer ces corrections.
The figure of 441.34 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days). It should not be taken as though the star is moving closer or further away from us. Because of its moderate brightness, Alkaphrah should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution. A faint star will have a high number.The location of the main sequence 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. If you want that in miles, it is about 2,486,893,677,871,594.37, based on 1 Ly = 5,878,625,373,183.61 miles.In 2007, Hipparcos data was revised with a new parallax of 9.10000 which put Alkaphrah at a distance of 358.42 light years or 109.89 parsecs. Megrez is a hydrogen-fusing dwarf still on the main sequence, located at around 80.5 light-years away from us. Based on the spectral type (A1Vn) of the star, the star's colour is blue - white . Ptolemy listed 27 stars as members of the constellation, plus another eight that he regarded as lying outside it (i.e. Comments may be merged or altered slightly such as if an email address is given in the main body of the comment.Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. If you used the 1997 Parallax value, you would get an absolute magnitude of -1.99 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.63. Alkaphrah is a main star of the constellation outline. -- 14 janvier 2015 à 11:01 (CET) Nu Bootis: Faible: Homonymie: Nu Canis Majoris: Faible: Homonymie As Galen Gisler said about his recent photo, ‘The two stars below the comet are at right, Iota Ursae Majoris and left, Kappa Ursae Majoris, magnitudes 3.14 and 3.56 respectively’. Alkaphrah is distant 422.83 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.The simplified sky map below shows the position of Alkaphrah in the sky:The table below summarizes the key facts about Alkaphrah:Alkaphrah is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Data at NED - NASA/IPAC Extragalactic Database : Kappa Ursae Majoris. The star is moving -55.40 ± 0.35 milliarcseconds/year towards the north and -36.19 ± 0.50 milliarcseconds/year east if we saw them in the horizon.Alkaphrah has an apparent magnitude of 3.57 which is how bright we see the star from Earth. Alkaphrah is a a1vn main sequence star that can be located in the constellation of Ursa Major. Proper Motion details the movements of these stars and are measured in milliarcseconds. So the comet’s nucleus may be 3.3. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. It is the 11 th brightest star in Ursa Major. Link by name to the catalogue in VizieR: CCDM J09036+4709AB: AG+47 796: AKARI-IRC-V1 J0903375+470923: BD+47 1633: FK5 341: HD 77327: HIC 44471: HIP 44471: HR 3594: IRAS 09002+4721: 2MASS J09033754+4709236: PLX 2162: PPM 50987: SAO 42661: TD1 13436: TYC 3424-1626-1 : uvby98 100077327: WDS J09036+4709AB: …