Denebola, along with Spica and Arcturus, is part of the Spring Triangle asterism, and by extension, also of the Great Diamond together with the star Cor Caroli. Denebola is a suspected Delta Scuti type variable star, meaning its luminosity varies very slightly over a period of a few hours.

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(If sky directions and position angles confuse you, see this post.).

Ausgehend von den damals angenommenen Werten für Temperatur und Radius erwartete Eddington eine Rotverschiebung von etwa +20 km/s. The Sun, in comparison, has an equatorial rotation velocity of 2 km/s. Denebola is a relatively young star with an age estimated at less than 400 million years. The Sun's radius is 695,800km, therefore the star's radius is an estimated 30,705,654.00.km. The Algieba star system is approximately 40.0pc from Terra, and is located in a Rimward direction from Terra at bearing 216.6o Galactic Longitude and +54.7o North Galactic Latitude. In the Alphonsine Tables it was recorded as Denebalezeth. Use the Search box below to find doubles by popular name, RA, or telescope size. Change ), You are commenting using your Twitter account. Der Winkelabstand der Komponenten beträgt 4,4", der …

of the weather), as the star's individual title. This suggests that they were born in the same location, and perhaps initially formed an open cluster. (Click for a larger view). In Hindu astronomy, Denebola corresponds to the Nakshatra (a sector along the ecliptic) named Uttara Phalgunī (second reddish one). Juli 2016 den Eigennamen Algieba als standardisierten Eigennamen nur für den Stern γ1 festgelegt. When I emerged from it a while later – I had no real luck with Porrima – I was brought up short by clouds near the Moon. However, the high rate of rotation results in an oblate shape with an equatorial bulge.

Juli 2016 den Eigennamen Algieba als standardisierten Eigennamen nur für den Stern γ1 festgelegt. Castor – three steps to take you from aw to awe! Based on parallax measurements from the Hipparcos astrometry satellite, the star is at a distance of about 36 light-years (11 parsecs) from the Sun. Change ).

Observations with the Herschel Space Observatory have provided resolved images, which show the disk to be located at a radius of 39 astronomical units from the star, or 39 times the distance from the Earth to the Sun. I also had no trouble getting a clean split with a 60mm refractor. A G star should be yellow. This site uses Akismet to reduce spam. Note:  A few mornings after this I was out with the 50mm F12 Tasco to tackle Mizar and once done, I took on Algieba and then Castor again. https://physik.cosmos-indirekt.de/physik_Wiki/index.php?title=Algieba&oldid=159855306, „Creative Commons Attribution/Share Alike“. Easily recognizable for the Sickle asterism that outlines the Lion’s mane and shoulders, Leo is known for its bright stars – mainly Regulus and Denebola – and a number of bright deep sky objects. Kinematic studies have shown that Denebola is part of a stellar association dubbed the IC 2391 supercluster. I finally got what I was after – two sharply defined globes with a very small slice of dark sky between them and the surrounding diffraction rings. Von den beiden anderen Komponenten gibt es kaum Daten, so dass das System oft als Doppelstern betrachtet wird. It also bears the Flamsteed designation of 94 Leonis (assigned on the basis of increasing right ascension rather than luminosity) and additional designations followed as the star was recorded in subsequent star catalogues. I turned the focus knob quickly, then slowly as the image began to sharpen, and managed to get a somewhat focused pair of stars. ( See the chart in this post on Star Colors.) If you need the diameter of the star, you just need to multiple the radius by 2. One of the most commonly viewed binary stars of spring, Algieba, also known as Gamma Leonis, lies 130.4 light years away from Earth and has a visible magnitude of 2.2. Had my first view of Algieba for the fall of 2011 at 6:30 AM this morning, just as the sky was beginning to get pale blue — looks like about a month earlier than last year, judging by the date on the comment above. Sissy Haas apparently used a 60mm and writes: “A brilliant figure 8, slightly unequal, grapefruit orange in color.”  She quotes Smyth as describing the stars as “bright orange, greenish yellow” and Webb as “Gold, greenish red.”  Oh boy! A 76mm f/15.7 Tasco, a 10.5mm Ortho (114x), a pale blue sky for a background, two sharply defined stars with traces of gold and yellow, surrounded by crisp diffraction rings ………….. if there had been a way to slow the earth’s rotation and hold back the daylight, I would have done it right then and there. My difficulty in picking up the color this time may have been due in part to the glare from the Moon because usually these colors jump out at me. After about 15 minutes, I dropped a 20mm TV Plossl (40x) in the focuser and waited for the image to settle down a bit, but couldn’t quite see a split. Der Name stammt aus dem Arabischen und bedeutet so viel wie Mähne des Löwen. Distance:  90 LY Gamma Leonis (γ Leonis, abbreviated Gamma Leo, γ Leo), also named Algieba /æˈdʒiːbə/, is a binary star system in the constellation of Leo. I checked the sky at midnight and saw that it was still cloudy, but knowing the forecast called for clearing, I turned in and decided to check back later.