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S A G I T T A

 

ori.gif (1448 bytes) Mythology and history

Mythology of Sagitta

       Sagitta or the arrow, although exists some indications which they could suggest relations of this constellation with Cupido, Hercules and Apolo, and of which could even be an arrow shot by Sagitario, the "arrowman", does not exist a mythology defined for this constellation, although she was already well well-known by the Greeks.

 

ori.gif (1448 bytes) Characteristics

           Sagitta or the arrow is a smallest square boreal constellation of 40º located between Vulpecula (the vixen) and Aquila (áquila), therefore, is very easy to locate it and to be able to get to really see that it has arrow form, its stars are relatively weak, of fourth magnitude included in the Milky Route and therefore, in the milky zone of the observable sky in the warm summery nights of the North hemisphere. Sagitta we can contemplate it to November from the months of May, the parallel of North 20º cuts the constellation in two. However, for the inhabitants of the South hemisphere he is observable in the nights you cold solely of winter to low height on the horizon.

        The constellation of Sagitta limits the north with Vulpecula , to the east with Hercules to the south with the constellation of Aquila and to the west with Delphinus. I located the 10 to it of August of 1982 at the age of 16 years from the locality of Cán Picafort, Majorca, Spain.

        The equator of our galaxy crosses the constellation of Sagitta of north to the south, therefore, in her we can observe great amount of weak stars and stellar clusters like globular, of course is impossible to be able to observe galaxies in Sagitta since when nailed being in the Milky Way, this one eclipsa the power to contemplate the Universe by the great amount of stars of our galaxy that there is.

            

Constellation of Sagitta

 

Main stars

Alpha, a ; denominated Sham , with a magnitude of 4.39 it is of yellow color, light is to 473 years and it reveals to us that the star is a giant 307 times more luminous than the Sun is located in the center of the constellation.

Beta, b ; with a magnitude of 4.38 and of color orange, find to 467 year light, and be a giant 300 time more luminous than the Sun, be locate closely together of a Sagittae, to sólamente 40' of arc.

Gamma, g ; orange stars, of phantom K, whose magnitude is of 3.51 which light of us is to 254 years, is a star 272 times more luminous than the Sun is located in the west of the constellation, close Vulpecula.

Delta, d ; is giant red 550 times more luminous than Sun, of phantom M, whose magnitude is of 3.83 which light of us is to 448 years, is located in the center of the constellation, between g and the set of a and b Sagittae.

 

Other objects

M71, spectacular globular cluster of magnitude 8.3, very easy to locate located between stars g and d Sagittae. Earth light is to 14,300 years, with an angular diameter of 7' of arc.

 

ori.gif (1448 bytes) Observations by telescope

D O U B L E

Nom: e R.A.: 19h.35m.

Dec: 16º21'

Mag: 5.7,8.0 Sep.: 89" P.A.: 81º Nat: op Spec.: K, B
AOC: 385 DSC: 273 D.D.S.: 22h.59m.(UT); 16-July-1985

epsilon

 

            NOTE: One is in a very rich zone. There is a great difference of brightness between the components, are very, very separated, is unfolded without difficulty with the eyeglass of 50x, the main one I see it orange, and secondary the bluish one.

 

ori.gif (1448 bytes) Other constellations

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