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U R S A   M A J O R

 

ori.gif (1448 bytes) Mythology and history

Mythology of Ursa Major

        Although for Egyptian the constellation of the Bear Mayor or Ursa Major it even represented the silhouette of a wild boar and hipopótamo for other civilizations, is the bear with the animal that has been more associated east asterism throughout the times between people who never maintained contacts to each other, like Arabs, Phoenicians and iroqueses (these of North America).

           The great God says to Greek mythology that Zeus encaprichó with the Callisto nymph of the goddess Morning call, of which Zeus disguised itself to approach the nymph until being able to make the love with her. As Callisto were pregnant and Morning call realized the occurred thing when it took a bath with all his nymphs, separated it from himself. Hera, the wife of Zeus listened that Callisto had parido to its Arkas son, reason why an attack of jealousy, turned it a bear.          

      Years later, Arkas found a bear to which, by fear, it tried to kill. Zeus, knowing that he was mother and son, took them and placed between shining stars like two and neighboring constellations. Hera, gotten upset by this, submerged in the ocean in search of Thethys and Oceanos, to which it counted history and it requested a favor: that the bear (the constellation Ursa Major) never touched the water. For that reason, according to mythology, the Great Bear never touches the horizon (Metamorphosis, book II, of Ovid).

 

ori.gif (1448 bytes) Characteristics

           Ursa Major, or the Great Bear (UMa) is an enormous circumpolar boreal constellation that inexorably gives returns around the celestial North Pole that stops these latitudes that I write to you as Ovid never commented touches the horizon. He is observable perfectly in any city although there is much luminance contamination, and in addition it helps to be able to locate many constellations us as you can observe in the Web. The Great Bear is a referring one at the time of throughout enjoying the nocturnal sky of any night the year. In addition based on the station in which we observe it we will always know if we are in summer, winter, autumn or spring. Logically the South hemisphere loses the beauty to contemplate it, sure also they have precious jewels that our eyes of the north cannot at the moment contemplate them.

                Ursa Major is characterized by seven stars more shining than also the car is called to them or dipper by its form characteristic of it and in addition along with the polestar form leaves from the flag of the American state of Alaska, when the territory of Alaska decided in 1926 to have an own flag, asked the citizens to send proposals of designs for the new standard. The winning design was the one of Benny Benson, of 13 years of age, shows to the 7 stars of the Great Bear and the star Polaris, the star of the north. When Alaska happened a state, this became its flag.

               Ursa Major limits the north with the constellations of Draco and Camelopardalis, to the east with Draco and Bootes, to the south with the constellations of Canes Venatici, Coma Berenice, Leo, Leo Minor and Lynx and to the west with Lynx and Camelopardalis.

The constellation of Ursa Major  I located the 2 to it of January of 1982 in the Majorcan locality of Inca, had then, 15 years.

   

Constellation of Ursa Major (Great bear)

 

Main stars

       Alpha, a; denominated Dubhe of magnitude 1.82 and orange color. Earth light is to 123 years, is an orange giant 225 times more luminous than our Sun, is one spectroscopic double. It is located to the north of the constellation and along with b points towards the polestar a form therefore, to identify it.

      Beta, b; denominated Merak, of magnitude 2.35 and white color. Earth light is to 79 years, is a star 57 times more luminous than our Sun is located to 5º to the south of Dubhe.

    Gamma, g; denominated Phad, of magnitude 2.43 and white color. Earth light is to 83 years and is 60 times more luminous than our Sun Form leaves from the accumulation of Syrian or accumulation of of Uma along with Merak, Mizar and Megrez.

   Delta, d; denominated Megrez, of magnitude 3.30 and white color. Earth light is to 81 years and is 240 times more luminous than our Sun.

    Zeta, z; denominated Mizar, of magnitude 2.22 and white color form leaves from one of double the most well-known ones and visible at first, if you manage to separate means them that you have a good Vista. The secondary one denominated also white Alcor is of magnitude 4.00 and is separated 12' of arc. Mizar is to 78 years light  and Alcor to 81 years light, both comprise of the accumulation of Uma.

Other objects

           M81; spiral galaxy of the Sb type of magnitude 6.9 located to the north of the constellation closely together of Draco; it has an angular diameter of 26'x14 ' of arc. 

             M82; irregular galaxy of magnitude 8.4 located to so single 30' of arc to the north of M81, has an angular diameter of 13'x6 ' of arc.

             M101; spiral galaxy of the Sc type located closely together of the constellation of Bootes in the South limit of the Great Bear, of magnitude 7.90 of angular diameter 28'x28 ' of arc.

 

ori.gif (1448 bytes) Observations by telescope

D O U B L E

Nom:S1415 R.A.: 10h.14m.

Dec: 71º19'

Mag: 6.6,7.3 Sep.: 5.1" P.A.: 126º Nat: f? Spec.: B, A
AOC: 480 DSC: 342 D.D.S.: 00h.21m.(UT); 22-Dec.-1985

sigma1415

 

        NOTE: One is in a poor zone in stars. There is a small difference of brightness between the components, are together. The colors are similar I create to see main blue and the secondary white. Easy to locate it is unfolded with the eyeglass of 50x.

 

D O U B L E

Nom:S 1427 R.A.: 10h.19m.

Dec: 44º10'

Mag: 7.6,8.0 Sep.: 9.3" P.A.: 212º Nat: f Spec.: B, A
AOC: 481 DSC: 343 D.D.S.: 00h.31m.(UT); 22-Dec.-1985

sigma1427

 

       NOTE: One is in a poor zone. There is a small difference of brightness, are slightly separated, unfolding itself without difficulty with the eyeglass of 50x, seemed colors, blue and white, respectively, it does not present/display difficulty when unfolding it.

 

D O U B L E

Nom: z / 80 R.A.: 13h.22m.

Dec: 55º11'

Mag: 2.0, 4.0 Sep.: 710" P.A.: 72º Nat: op Spec.: A, B
AOC: 736 DSC: 535 F.E.: 22h.30m.(UT); 7-Feb.-1987

D O U B L E

Nom: z R.A.: 13h.22m.

Dec: 55º11'

Mag: 2.2, 4.2 Sep.: 14" P.A.: 150º Nat: f Spec.: A, K
AOC: 737 DSC: 536 D.D.S.: 22h.31m.(UT); 7-Feb.-1987

D O U B L E

Nom: No catalog. R.A.: 13h.22m.

Dec: 54º50'

Mag: 8.0,8.5 Sep.: 40" P.A.: 350º Nat: ? Spec.: ?, ?
AOC: 738 DSC: 537 D.D.S.: 22h.34m.(UT); 7-Feb.-1987

zeta & 80

       

            NOTE: z / 80: One is one separable double at first for which they have a good Vista. He was discovered in the antiquity and even, the American Indians already put record of elo. The brightness difference is very appreciable.

        z: As well, z Ursa Majoris is one double, much more pretty and of components more tightened, it is unfolded with 50x.

        CED 537: One is one catalogued but not identified double in the Sky Catalogue 2000,0 of Sinnot. Ursa is to 20' to the south of z majoris. Of weak and slightly separated components, it is unfolded, also, with the eyeglass of 50x.

 

D O U B L E

Nom: S 1608 R.A.: 12h.09m.

Dec: 53º43'

Mag: 8.2, 8.4 Sep.: 13" P.A.: 220º Nat: op Spec.: A, B
AOC: 740 DSC: 539 D.D.S.: 22h.48m.(UT); 7-.Feb.-1987

sigma1608

 

        NOTE: One is in a partially rich zone. There is a smallest difference of brightness between the components, easy to locate is unfolded with the eyeglass of 50x, the main one I see secondary white it and the blue one.

 

D O U B L E

Nom: S 1603 R.A.: 12h.06m.

Dec: 55º45'

Mag: 8.0,8.4 Sep.: 22" P.A.: 82º Nat: f? Spec.: ?, ?
AOC: 741 DSC: 540 D.D.S.: 22h.53m.(UT); 7-Feb.-1987

sigma1603

 

        NOTE: One is in a quite poor zone. There is a slight difference of brightness, is one double of weak and slightly separated components, due to the little brightness profit not to identify the colors of these.

 

D O U B L E

Nom: S 1600 R.A.: 12h.03m.

Dec: 52º13'

Mag: 7.5,8.3 Sep.: 7.8" P.A.: 94º Nat: f Spec.: A, B
AOC: 742 DSC: 541 D.D.S.: 22h.57m.(UT); 7-Feb.-1987

sigma1600

 

       NOTE: One is in a poor zone. A slight difference of magnitude based in 0.8 units exists, but nonexcessive, with the eyeglass of 50x the easy one is observed double tight but to discover and to unfold it. The main one I see white it, however, the secondary one seems to see it to me bluish.

 

D O U B L E

Nom: S 1599 R.A.: 12h.03m.

Dec: 68º58'

Mag: 7.1,8.0 Sep.: 26" P.A.: 181º Nat: f Spec.: A, B
AOC: 743 DSC: 542 D.D.S.: 23h.05m.(UT); 7-Feb.-1987

sigma1599

 

        NOTE: One is in a partially rich zone. There is a slight difference of brightness between the components, the main one I see secondary white it and the blue one. It is unfolded with the eyeglass of 50x.

 

D O U B L E

Nom: OS 114 R.A.: 11h.58m.

Dec: 37º00'

Mag: 8.1,8.5 Sep.: 87" P.A.: 81º Nat: op Spec.: A, B
AOC: 744 DSC: 543 D.D.S.: 23h.10m.(UT); 7-Feb.-1987

osigma114

 

       NOTE: One is in a very poor star field. They are very separated, unfolding itself without difficulty with 50x, the main one I see white it and secondary the blue one, is formed by components of low brightness.

 

D O U B L E

Nom: 65 R.A.: 11h.52m.

Dec: 46º45'

Mag: 6.4, 8.4, 6.5 Sep.(AB): 3.7"

Sep.(AC): 63"

P.A.(AB): 39º

P.A.(AC): 114º

Nat(AB): f

Nat(AC): op

Spec.: A, B, B
AOC: 745 DSC: 544 D.D.S.: 23h.16m.(UT); 7-Feb.-1987

65

 

        NOTE: One is in a partially poor zone. The eyeglass of 100x is a remarkable difference of brightness being essential to unfold it component AB; however, component AC appears very separated although of components of same brightness. With relation with the colors the component To I see white it and components B and C of blue color.

 

D O U B L E

Nom: S 1576 R.A.: 11h.50m.

Dec: 31º46'

Mag: 8.8, 9.2 Sep.: 5.1" P.A.: 240º Nat: f Spec.: ?, ?
AOC: 746 DSC: 545 D.D.S.: 23h.24m.(UT); 7-Feb.-1987

sigma1576

 

        NOTE: One is in a poor zone. There is a small difference of brightness. One is one double of weak components of tight brightness and something, is unfolded with difficulty with 50x, although with 100x already the double with facility is appraised but not its color.

 

D O U B L E

Nom: Arg R.A.: 11h.49m.

Dec: 33º38'

Mag: 6.4, 8.7 Sep.: 47" P.A.: 275º Nat: ? Spec.: A, B
AOC: 747 DSC: 540 D.D.S.: 23h.27m.(UT); 7-Feb.-1987

arg

 

        NOTE: One is in a zone, very, very very poor in stars. There is a remarkable difference of brightness between the components, are very separated observing main of secondary white color and the blue one. It is unfolded without difficulty with the eyeglass of 50x.

 

D O U B L E

Nom: b pm R.A.: 10h.19m.

Dec: 44º03'

Mag: 6.7, 9.0 Sep.: 150.6" P.A.: 103º Nat: ? Spec.: G, B
AOC: 930 DSC: 709 D.D.S.: 21h.47m.(UT); 20-Jan.-1990

betapm

 

        NOTE: One is in a somewhat rich zone. There is a remarkable difference of brightness between the components, are very separated, unfolding itself with the eyeglass of 50x, the main one I see yellow it and the secondary one is blue.

 

D O U B L E

Nom: S 1695 R.A.: 12h.56m.

Dec: 54º06'

Mag: 3.3,3.7 Sep.: 7.9" P.A.: 283º Nat: f Spec.: A, A
AOC: 933 DSC: 712 D.D.S.: 23h.30m.(UT); 20-Jan.-1990

sigma1695

 

        NOTE: One is in a very poor zone. One is one double of shining components, and with a slight difference of brightness among them, they are something tight, unfolding itself with the eyeglass of 100x, both I see them of white color.

 

D O U B L E

Nom: OS121 R.A.: 13h.10m.

Dec: 62º14'

Mag: 6.6,9.8 Sep.: 107.8" P.A.: Nat: ? Spec.: A, A
AOC: 934 DSC: 713 D.D.S.: 23h.38m.(UT); 20-Jan.-1990

osigma121

 

        NOTE: One is in a somewhat poor zone. There is a remarkable difference of brightness between the components that are very separated, both I see them of white color, is unfolded without difficulty with the eyeglass of 50x.

 

D O U B L E

Nom: S 1732 R.A.: 13h.13m.

Dec: 58º27'

Mag: 8.2,9.7 Sep.: 26.3" P.A.: 128º Nat: ? Spec.: G, A
AOC: 935 DSC: 714 D.D.S.: 23h.45m.(UT); 20-Jan.-1990

sigma1732

 

        NOTE: One is in a partially rich zone. A difference of brightness between the components exists, are something separated, unfolding itself with the eyeglass of 50x.

 

D O U B L E

Nom: OS122 R.A.: 13h.14m.

Dec: 56º42'

Mag: 6.8, 8.7 Sep.: 117.5" P.A.: 213º Nat: op Spec.: G, G
AOC: 937 DSC: 717 D.D.S.: 23h.57m.(UT); 20-Jan.-1990

osigma122

 

        NOTE: One is in a rich zone. There is a remarkable difference of brightness between the components that are very separated. It is unfolded with the eyeglass of 50x, both components are of yellow color. One is a pretty double.

          

 

ori.gif (1448 bytes) Other constellations

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