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- Alpha_Camelopardalis abstract "Alpha Camelopardalis (Alpha Cam, α Camelopardalis, α Cam) is a star in the constellation Camelopardalis, with an apparent visual magnitude of 4.3. It is the third brightest star in this not very prominent circumpolar constellation, the first and second brightest stars being β Camelopardalis and CS Camelopardalis, respectively. It is the farthest constellational star, with a distance of 6000 light-years from Earth.This star has a stellar classification of O9 Ia, with the 'Ia' indicating that it is an O-type luminous supergiant. It is a massive star with 31 times the mass of the Sun and 37 times the Sun's radius. The effective temperature of the outer envelope is 30,000 K; much hotter than the Sun's effective temperature of 5,778 K, giving it the characteristic blue hue of an O-type star. It is emitting 620,000 times the luminosity of the Sun and is a weak X-ray emitter.This star shows multiple patterns of variability. It may be a non-radial pulsating variable star, which is causing changes in the spectrum being emitted by the photosphere. The absorption lines in the optical spectrum show radial velocity variations, although there is significant uncertainty about the period. Estimates range from a period as low as 0.36 days up to 2.93 days. The stellar wind from this star is not smooth and continuous, but instead shows a behavior indicating clumping at both large and small scales. This star is losing mass rapidly through its stellar wind at a rate of approximately 6.3 × 10−6 solar masses per year, or the equivalent of the mass of the Sun every 160,000 years.In 1968, this star was classified as a spectroscopic binary, indicating that it has an orbiting stellar companion with a period of 3.68 days and an orbital eccentricity of 0.45. Subsequent studies refined the period to 3.24 days. However, in 2006 it was recognized that the changes in the spectrum were probably the result of changes in the atmosphere or stellar wind, so it is more likely a single star. Speckle interferometry observations with the 3.67 m Advanced Electro Optical System Telescope at the Haleakala Observatory failed to detect a secondary component.In 1961, based on the criteria that the proper motion of this star indicates a space velocity of greater than 30 km/s, Alpha Camelopardalis was suggested as a candidate runaway star that had been ejected from the cluster NGC 1502. This was based upon the kinematic properties of the star and cluster, as well as the location of this star at a high galactic latitude in an area otherwise lacking in stellar associations. Over the course of a million years, this star should have moved only 1.4° across the sky, while it was estimated as being only two million years old.Runaway stars such as this with a stellar wind that is moving at supersonic velocity through the interstellar medium have their wind confined by a bow shock due to ram pressure. The dust in this bow shock can be detected using an infrared telescope. Just such a bow shock was observed with NASA's Wide-field Infrared Survey Explorer, or WISE. The star is traveling at a rate of somewhere between 680 and 4,200 kilometers per second: between 1.5 and 9.4 million mph.".
- Alpha_Camelopardalis thumbnail Camelopardalis_IAU.svg?width=300.
- Alpha_Camelopardalis wikiPageExternalLink AladinPreview?-c=04+54+03.0113%2B66+20+33.641&ident=*+alf+Cam&submit=Aladin+previewer.
- Alpha_Camelopardalis wikiPageExternalLink VizieR-S?HR%201542.
- Alpha_Camelopardalis wikiPageExternalLink 4198141225.
- Alpha_Camelopardalis wikiPageID "4494960".
- Alpha_Camelopardalis wikiPageLength "13438".
- Alpha_Camelopardalis wikiPageOutDegree "70".
- Alpha_Camelopardalis wikiPageRevisionID "706476134".
- Alpha_Camelopardalis wikiPageWikiLink 24_Ursae_Majoris.
- Alpha_Camelopardalis wikiPageWikiLink 3.67_m_Advanced_Electro_Optical_System_Telescope.
- Alpha_Camelopardalis wikiPageWikiLink 43_Camelopardalis.
- Alpha_Camelopardalis wikiPageWikiLink Aladin_Sky_Atlas.
- Alpha_Camelopardalis wikiPageWikiLink Apparent_magnitude.
- Alpha_Camelopardalis wikiPageWikiLink BK_Camelopardalis.
- Alpha_Camelopardalis wikiPageWikiLink Bayer_designation.
- Alpha_Camelopardalis wikiPageWikiLink Beta_Camelopardalis.
- Alpha_Camelopardalis wikiPageWikiLink Binary_star.
- Alpha_Camelopardalis wikiPageWikiLink Boss_General_Catalogue.
- Alpha_Camelopardalis wikiPageWikiLink Bright_Star_Catalogue.
- Alpha_Camelopardalis wikiPageWikiLink CS_Camelopardalis.
- Alpha_Camelopardalis wikiPageWikiLink Camelopardalis.
- Alpha_Camelopardalis wikiPageWikiLink Catalogues_of_Fundamental_Stars.
- Alpha_Camelopardalis wikiPageWikiLink Category:Bayer_objects.
- Alpha_Camelopardalis wikiPageWikiLink Category:Camelopardalis_(constellation).
- Alpha_Camelopardalis wikiPageWikiLink Category:Durchmusterung_objects.
- Alpha_Camelopardalis wikiPageWikiLink Category:Emission-line_stars.
- Alpha_Camelopardalis wikiPageWikiLink Category:Flamsteed_objects.
- Alpha_Camelopardalis wikiPageWikiLink Category:HR_objects.
- Alpha_Camelopardalis wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
- Alpha_Camelopardalis wikiPageWikiLink Category:Hipparcos_objects.
- Alpha_Camelopardalis wikiPageWikiLink Category:O-type_supergiants.
- Alpha_Camelopardalis wikiPageWikiLink Chinese_language.
- Alpha_Camelopardalis wikiPageWikiLink Circumpolar_star.
- Alpha_Camelopardalis wikiPageWikiLink Constellation.
- Alpha_Camelopardalis wikiPageWikiLink Durchmusterung.
- Alpha_Camelopardalis wikiPageWikiLink Effective_temperature.
- Alpha_Camelopardalis wikiPageWikiLink Epoch_(astronomy).
- Alpha_Camelopardalis wikiPageWikiLink Flamsteed_designation.
- Alpha_Camelopardalis wikiPageWikiLink Haleakala_Observatory.
- Alpha_Camelopardalis wikiPageWikiLink Henry_Draper_Catalogue.
- Alpha_Camelopardalis wikiPageWikiLink Hipparcos.
- Alpha_Camelopardalis wikiPageWikiLink IRAS.
- Alpha_Camelopardalis wikiPageWikiLink Infrared.
- Alpha_Camelopardalis wikiPageWikiLink International_Celestial_Reference_System.
- Alpha_Camelopardalis wikiPageWikiLink Interstellar_medium.
- Alpha_Camelopardalis wikiPageWikiLink Kappa_Draconis.
- Alpha_Camelopardalis wikiPageWikiLink Lambda_Draconis.
- Alpha_Camelopardalis wikiPageWikiLink NGC_1502.
- Alpha_Camelopardalis wikiPageWikiLink O-type_star.
- Alpha_Camelopardalis wikiPageWikiLink Orbital_eccentricity.
- Alpha_Camelopardalis wikiPageWikiLink PPM_Star_Catalogue.
- Alpha_Camelopardalis wikiPageWikiLink Photosphere.
- Alpha_Camelopardalis wikiPageWikiLink Proper_motion.
- Alpha_Camelopardalis wikiPageWikiLink Purple_Forbidden_enclosure.
- Alpha_Camelopardalis wikiPageWikiLink Ram_pressure.
- Alpha_Camelopardalis wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
- Alpha_Camelopardalis wikiPageWikiLink Solar_luminosity.
- Alpha_Camelopardalis wikiPageWikiLink Solar_mass.
- Alpha_Camelopardalis wikiPageWikiLink Solar_radius.
- Alpha_Camelopardalis wikiPageWikiLink Spectral_line.
- Alpha_Camelopardalis wikiPageWikiLink Star.
- Alpha_Camelopardalis wikiPageWikiLink Star_Names.
- Alpha_Camelopardalis wikiPageWikiLink Stellar_classification.
- Alpha_Camelopardalis wikiPageWikiLink Stellar_kinematics.
- Alpha_Camelopardalis wikiPageWikiLink Stellar_wind.
- Alpha_Camelopardalis wikiPageWikiLink Supergiant.
- Alpha_Camelopardalis wikiPageWikiLink Supersonic_speed.
- Alpha_Camelopardalis wikiPageWikiLink Thuban.
- Alpha_Camelopardalis wikiPageWikiLink Variable_star.
- Alpha_Camelopardalis wikiPageWikiLink Washington_Double_Star_Catalog.
- Alpha_Camelopardalis wikiPageWikiLink File:Camelopardalis_IAU.svg.
- Alpha_Camelopardalis wikiPageWikiLink File:Cercle_rouge_100%25.svg.
- Alpha_Camelopardalis wikiPageWikiLinkText "Alpha Camelopardalis".
- Alpha_Camelopardalis wikiPageWikiLinkText "α Cam".
- Alpha_Camelopardalis wikiPageWikiLinkText "α Camelopardalis".
- Alpha_Camelopardalis absmagV "–7.1".
- Alpha_Camelopardalis age "~2 million".
- Alpha_Camelopardalis appmagV "4.29".
- Alpha_Camelopardalis bV "+0.05".
- Alpha_Camelopardalis class "O9Ia".
- Alpha_Camelopardalis constell Camelopardalis.
- Alpha_Camelopardalis epoch Epoch_(astronomy).
- Alpha_Camelopardalis equinox "J2000.0".
- Alpha_Camelopardalis gravity "3".
- Alpha_Camelopardalis luminosity "620000".
- Alpha_Camelopardalis mass "30.9".
- Alpha_Camelopardalis pError "0.19".
- Alpha_Camelopardalis parallax "0.52".
- Alpha_Camelopardalis propMoDec "+6.89".
- Alpha_Camelopardalis propMoRa "–0.13".
- Alpha_Camelopardalis rI "0".
- Alpha_Camelopardalis radialV "+6.1".
- Alpha_Camelopardalis radius "29".
- Alpha_Camelopardalis rotationalVelocity "80".
- Alpha_Camelopardalis temperature "30000".
- Alpha_Camelopardalis uB "−0.87".
- Alpha_Camelopardalis wikiPageUsesTemplate Template:DEC.
- Alpha_Camelopardalis wikiPageUsesTemplate Template:Lang-en.
- Alpha_Camelopardalis wikiPageUsesTemplate Template:RA.