G E M I N I

 

ori.gif (1448 bytes) Mythology and history

Mythology of Gemini

            Third zodiacal constellation that must its name to the evocación of the mitológicos binoculars Cástor and Pollux.   The association of two stars more shining of Gemini with a terrenal pair has been practically universal. In Egypt, they were two I appear vegetal and in the Phoenician culture it was associated them with a pair of goats. The mesopotámico prototype of the classic binoculars shows them like two naked boys. In one of the Roman interpretations of the constellation, the binoculars are associated with Rómulo and Remo, the legendary founders of Rome and for the Arabs were turkeys.

             In Greek mythology, the binoculars are Cástor and Polideuco (Pólux for the Romans). They were born of an egg that put Leda, the queen of Esparta, after to have copulado with Zeus turned swan. Cástor, the mortal, was son of king Tíndaro; the inmortal Polideuco was son of Zeus.

         The twins traveled to the country governed by Idas and Linceo. Goings assassinated to Cástor with a lance, to which Polideuco, in spite of its wounds, responded killing Linceo. Zeus took part and killed Goings. Polideuco rejected its condition of inmortal if it could not share it with Cástor. Zeus allowed that the binoculars alternated their days between the kingdom of the Gods and hell.

         Poseidón (Neptune) turned the binoculars protectors of the sailors; both had comprised of the crew of argonauts that Jasón enlisted so that they helped it to recover the Vellocino de Oro. Therefore, the stars Cástor and Pollux are to much height over mast Navis the Argon formed by the constellations of Vela, Carina and Puppis.

Ruins of temple of Castor and Pollux

         In summer of 2003, with my friend we went to Sicily (Italy) and could enjoy in the locality of Agrigento of wonderful Greek temples. The one of the photo corresponds to Castor and Pollux.

 

 

Temple dedicated to Cástor and Pollux.  Agrigento, Sicily, Italy.

 

ori.gif (1448 bytes) Characteristics

           Gemini, precious constellation of visible the North hemisphere during the months of autumn and winter in the North hemisphere and summer in the austral one, the constellation is crossed by the parallel +30º. When observing for the first time emphasizes it its two stars more shining Castor and separated Pollux of almost identical magnitude 3,50º that are in the western sector. Gemini or Geminis is in a rich zone of stars since our galaxy, the Milky Route crosses the constellation by the Eastern, bordering sector with the constellation of Taurus, therefore, we managed to observe many double stars, variable and shining stellar accumulations.

            Gemini is a zodiacal constellation, that is to say, the ecliptic or imaginary line in which it moves the Sun and nine planets crosses the constellation of this a the west remaining in her the Sun for more than thirty days from end of June and the first fortnight of Julio. Therefore, in Gemini we can see planets, and asteroids. Gemini limits the north with Lynx and Auriga, to the east with Taurus and Orion, to the south with the constellations of Monoceros and Canis Minor and to the west with Cancer.

            Gemini I located  on January 1st, 1982 at the age of 14 years from the locality of Inca, Majorca to it, Spain, in one cold night of winter.

Constellation of Gemini

 

Main stars

       Alpha, a; denominated Castor or Apolo, of magnitude 2.02 and white. It is a precious double star whose secondary it is of also white magnitude 2.80 and, separated sólamente to 2"of arc. The system is to 51 years Earth light

      Beta, b; demoninada Pollux or Hercules, of magnitude 1.22 and orange. Light is to 33 years and is thirty times more luminous than our Sun.

       Gamma, g; denominated Alhena, of magnitude 2.02 and white. It is located to the south of the constellation. Light is to 104 years and is a giant 145 times more luminous than our Sun.

    Delta, d;   denominated Wasat or Wesat, of magnitude 3.54 and yellow color. Light is to 58 years.

Other objects

        M35; precious rich stellar accumulation and partially concentrated of 28' of diameter arc, that is in the limit with the constellation of Taurus. Of magnitude 5.10, Earth light is to 2,800 years. It has an age of about 100 million years, the most shining star has a magnitude of 8,0.                 

           

 

ori.gif (1448 bytes) Observations by telescope

C L U S T E R

NGC:2168

M:35

R.A.: 06h.06m.

Dec: 24º20'

Mag: 5.3

Dim:30'x40' AOC: 58 C.N.A.O.: 16
D.D.S.: 00-Dic.-1983  

m35

 

        NOTE: One is M35; he is impressive, is a great amount of stars grouped in several nucleos, emphasizes, in addition, a symmetry of curves in the accumulation that makes him emphasize, is surrounded by shining stars.

 

D O U B L E

Nom:a R.A.: 07h.31m.

Dec: 32º00'

Mag: 2.0, 2.8, 8.8 Sep.(AB): 2.0"

Sep.(AC): 72"

P.A.(AB): 101º

P.A.(AC): 163º

Nat(AB):O

Nat(AC): ph

Spec.: A, A, B
AOC: 546 DSC: 394 D.D.S.: 19h.17m.(UT); 27-Mar.-1986 (prisma)

alfa

       

        NOTE: Castor is the star; there is a smallest difference of magnitude between components AB, both are white, and it is unfolded with the eyeglass of 200x. Component C is a star much more weak of brightness, and very separated in relation to component AB. Easy to locate C with 50x is unfolded. The set, in general, is subtle and pretty. They form, as he is natural, a physical system.

 

D O U B L E

Nom:S 1108 R.A.: 07h.30m.

Dec: 23º00'

Mag: 6.5, 8.5 Sep.: 12" P.A.: 179º Nat:? Spec.: K,A
AOC: 547 DSC: 395 D.D.S.:19h.32m.(UT); 27-Mar.-1986 (prisma)

sigma1108

 

        NOTE: One is in a rich zone; there is a remarkable difference of magnitude, are slightly separated, is enough the eyeglass of 50x solely to unfold it, the main one is orange, however, the secondary one is white, although due to the weakness of brightness of the secondary one it does not manage to define with certainty the color.

 

C L U S T E R

IC: 2157

M:--

R.A.: 06h.02m.

Dec: 24º02'

Mag: 8.5

Dim:4' AOC: 730 C.N.A.O.: 202
D.D.S.: 01h.23m.(UT); 1-Feb.-1987  

IC2157

 

       NOTE: One is to 15' to the west of M35, story ten stars of 9º and 10º magnitude, has a diameter of 5', oriented with an angle of position of 20º.

 

D O U B L E

Nom:Sh 70 R.A.: 06h.24m.

Dec: 20º49'

Mag: 6.8, 8.3 Sep.: 27" P.A.: 202º Nat:op Spec.:A,M
AOC:731 DSC: 530 D.D.S.: 01h.45m.(UT); 1-Feb.-1987

D O U B L E

Nom: µ R.A.: 06h.26m.

Dec: 20º15'

Mag: 4.1, 8.0 Sep.: 113" P.A.: 330º Nat:op Spec.: A,A
AOC: 732 DSC: 531 D.D.S.: 01h.49m.(UT); 1-Feb.-1987

sh70

 

            NOTE: Sh 70: One is in a partially rich zone; there is a remarkable difference of magnitude, the main one I believe that she is white, however, the secondary one he is red, it is one pretty double, it is unfolded with 50x.

            µ: one is to 40' to the south of Sh70; they are very separated, there is an enormous difference of brightness, is unfolded without difficulty with 50x.

 

D O U B L E

Nom: 20 R.A.: 06h.29m.

Dec: 17º49'

Mag: 7.0, 7.9 Sep.: 20" P.A.: 210º Nat:f Spec.:A,B
AOC: 733 DSC: 532 D.D.S.:01h.52m.(UT); 1-Feb.-1987

20

 

            NOTE: One is in a partially rich zone; there is a small difference of magnitude between its components, the distance that separates to them is ideal, the main one I see white it, however, the secondary one is bluish, although I am not absolutely safe; easy to locate it is unfolded without difficulty with 50x.

 

D O U B L E

Nom: h 392 R.A.: 06h.30m.

Dec: 25º20'

Mag: 8.6, 9.0 Sep.: 24" P.A.: 36º Nat:f Spec.: A, B
AOC: 734 DSC: 533 D.D.S.: 01h.56m.(UT); 1-Feb.-1987

h392

 

            NOTE: One is in a partially rich zone; there is a smallest difference of brightness between the components, the distance that separates to them is comfortable for a placid observation, the main one seems to me that she is white, however, the secondary one is bluish, although I am not absolutely safe due to the weakness of brightness, easy to locate is unfolded with the eyeglass of 50x.

 

ori.gif (1448 bytes) Other constellations

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