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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 4.301. 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 O9.5Iae, with the 'Ia' indicating that it is an O-type luminous supergiant and the 'e' showing that there are emission lines in its spectrum. It is a massive star with 43 times the mass of the Sun and 37 times the Sun's radius. The effective temperature of the outer envelope is 27,700 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 680,000 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 interferometery 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. It has been suggested as a runaway star ejected from the OB association Camelopardalis OB1, but subsequent observations cast doubt on this.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 wikiPageRevisionID "606035942".
- Alpha_Camelopardalis absmagV "–7.1".
- Alpha_Camelopardalis age "~2 million".
- Alpha_Camelopardalis appmagV "4.301".
- Alpha_Camelopardalis bV "+0.03".
- Alpha_Camelopardalis class "O9.5Iae".
- Alpha_Camelopardalis constell Camelopardalis.
- Alpha_Camelopardalis epoch Epoch_(astronomy).
- Alpha_Camelopardalis equinox "J2000.0".
- Alpha_Camelopardalis gravity "3".
- Alpha_Camelopardalis hasPhotoCollection Alpha_Camelopardalis.
- Alpha_Camelopardalis luminosity "680000".
- Alpha_Camelopardalis mass "43.2".
- 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 "36.8".
- Alpha_Camelopardalis rotationalVelocity "80".
- Alpha_Camelopardalis temperature "27700".
- Alpha_Camelopardalis uB "−0.88".
- Alpha_Camelopardalis subject Category:Bayer_objects.
- Alpha_Camelopardalis subject Category:Camelopardalis_(constellation).
- Alpha_Camelopardalis subject Category:Durchmusterung_objects.
- Alpha_Camelopardalis subject Category:Emission-line_stars.
- Alpha_Camelopardalis subject Category:Flamsteed_objects.
- Alpha_Camelopardalis subject Category:Henry_Draper_Catalogue_objects.
- Alpha_Camelopardalis subject Category:Hipparcos_objects.
- Alpha_Camelopardalis subject Category:O-type_supergiants.
- Alpha_Camelopardalis subject Category:Objects_within_10_kly_of_Earth.
- Alpha_Camelopardalis type BayerObjects.
- Alpha_Camelopardalis type CelestialBody109239740.
- Alpha_Camelopardalis type DurchmusterungObjects.
- Alpha_Camelopardalis type Emission-lineStars.
- Alpha_Camelopardalis type FlamsteedObjects.
- Alpha_Camelopardalis type HIPObjects.
- Alpha_Camelopardalis type HenryDraperCatalogueObjects.
- Alpha_Camelopardalis type NaturalObject100019128.
- Alpha_Camelopardalis type O-typeSupergiants.
- Alpha_Camelopardalis type Object100002684.
- Alpha_Camelopardalis type PhysicalEntity100001930.
- Alpha_Camelopardalis type Star109444100.
- Alpha_Camelopardalis type Supergiant109450708.
- Alpha_Camelopardalis type Whole100003553.
- Alpha_Camelopardalis type CelestialBody.
- Alpha_Camelopardalis type Star.
- Alpha_Camelopardalis type PhysicalBody.
- Alpha_Camelopardalis comment "Alpha Camelopardalis (Alpha Cam, α Camelopardalis, α Cam) is a star in the constellation Camelopardalis, with an apparent visual magnitude of 4.301.".
- Alpha_Camelopardalis label "Alfa Camelopardalis".
- Alpha_Camelopardalis label "Alfa Camelopardalis".
- Alpha_Camelopardalis label "Alfa Camelopardalis".
- Alpha_Camelopardalis label "Alpha Camelopardalis".
- Alpha_Camelopardalis label "Alpha Camelopardalis".
- Alpha_Camelopardalis label "Alpha Camelopardalis".
- Alpha_Camelopardalis label "Alpha Camelopardalis".
- Alpha_Camelopardalis label "Альфа Жирафа".
- Alpha_Camelopardalis label "きりん座アルファ星".
- Alpha_Camelopardalis label "少衛 (右垣)".
- Alpha_Camelopardalis sameAs Alfa_Camelopardalis.
- Alpha_Camelopardalis sameAs Alpha_Camelopardalis.
- Alpha_Camelopardalis sameAs Alfa_Camelopardalis.
- Alpha_Camelopardalis sameAs きりん座アルファ星.
- Alpha_Camelopardalis sameAs Alpha_Camelopardalis.
- Alpha_Camelopardalis sameAs Alfa_Camelopardalis.
- Alpha_Camelopardalis sameAs Alpha_Camelopardalis.
- Alpha_Camelopardalis sameAs m.0c5h7n.
- Alpha_Camelopardalis sameAs Q2268090.
- Alpha_Camelopardalis sameAs Q2268090.
- Alpha_Camelopardalis sameAs Alpha_Camelopardalis.
- Alpha_Camelopardalis wasDerivedFrom Alpha_Camelopardalis?oldid=606035942.
- Alpha_Camelopardalis depiction Camelopardalis_IAU.svg.
- Alpha_Camelopardalis isPrimaryTopicOf Alpha_Camelopardalis.
- Alpha_Camelopardalis name "α Camelopardalis".