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D E L P H I N U S

 

ori.gif (1448 bytes) Mythology and history

Mythology of Delphinus

     The representation of Delphinus appears recorded in currencies of the siciliana city of Siracusa that date from 480 b. C. In them it is seen a young person straddling the animal, in memory of the Greek legend that narrated like Arión once it traveled towards Italy was able to be saved of the bloody sacking of some of crew d the ship where it had embarked throwing itself to the sea where there was a boat of dolphins that put to him out of danger.  The legend says that once arrived at southern Italy it founded the city of Tarento.

         For the Hebrew towns they have seen in the celestial figure the memory of the fish that swallowed to Jonás before it acquired the gift of the prophecy. Peculiarly the Arabs, auque saw in the constellation a camel, called Al-Dulfin, translating literally the grecolatino name. But also they called Al-Salib ,is to say the cross to him.

 

ori.gif (1448 bytes) Characteristics

               The constellation of Delphinus is characterized being smallest of the boreal hemisphere. It is observed during the months of May until October and during the austral winter, it culminates therefore, during the month of August. The North parallel of 10º crosses the constellation. On the other hand one is next to the galactic equator reason why he is observable great amount of doubles and stellar cumulos.

                It limits the north with the constellation of Vulpecula, the east with the constellations of Sagitta and Aquila, the south with this one and Aquarius and to the west with Equuleus and Pegasus. The stars of Delphinus appear grouped in ela central part of the constellation, the stars to, b, g and d forms a rhombus that outlines the head of the dolphin, but due to its almost perfect geometric disposition they have also suggested the aspect of the purest diamond.

Constellation of Delphinus

Main stars

       Alpha, a; denominated Sualocin, of magnitude 3.78, blue color. Light is to 241 years, is 140 times more shining than the Sun.

      Beta, b;  denominated Rotanev, of magnitude 3.63, yellow color. Light is to 97 years and is 26 times more luminous than the Sun.

       Gamma, g; double precious, of magnitude 4,40, yellow, is to 106 years light. 15 times more luminous than the Sun. The secondary one is of magnitude 5.14 and it is to 8.90"of arc.

       Delta, d; of 4,50 magnitude and white color. Light is to 203 years. 54 times more luminous than the Sun one thinks that it is member of the group of Sirius.

Other objects

           NGC 6934, globular cluster of magnitude 8.90, 6,2' of diameter arc. Light is to 48,500 years.

           NGC 7006, globular cluster of brightness 10.60 and 2,2' of arc. Light is to 127,000 years.

 

ori.gif (1448 bytes) Observations by telescope

D O U B L E

Nom: g R.A.: 20h.40m.

Dec: 15º57'

Mag: 4.2, 5.2 Sep.: 9.7" P.A.: 267º Nat:ph Spec.:G, M
AOC: 5 DSC: 5 D.D.S.: 00-Jul.-1983

gamma

        NOTE: One is in a very rich zone; it is one precious double, the main one is yellowish and secondary the red one, forms a physical system, is unfolded without difficulty with 50x, although the best spectacle we obtain it with 200x.

 

D O U B L E

Nom:S 2725 R.A.: 20h.44m.

Dec: 15º43'

Mag: 7.5, 8.2 Sep.: 5.2" P.A.: 12º Nat:ph Spec.:G, M
AOC: 6 DSC: 6 D.D.S.: 00-Ago.-1983

sigma2725

        NOTE: One is in a rich zone; one is very next to g Delphini, is a small difference of magnitude, are more together being able to unfold with 50x, the main one is yellow, however, the secondary one is red, is a precious double.

 

D O U B L E

Nom:S 2703 R.A.: 20h.34m.

Dec: 14º33'

Mag: 8.3, 8.3, 8.5 Sep.(AB): 26"

Sep.(BC): 63"

P.A.(AB): 290º

P.A.(BC): 216º

Nat(AB):f

Nat(AC): op

Spec.:B, B, B
AOC: 7 DSC: 7 D.D.S.:00-Ago.-1983

sigma2703

        NOTE: One is a precious triple, one is located to half of distance between z and b Delphini; as much the main one as the secondary one has the same magnitude, however, third he is slightly weaker, but very little, the three components are blue.

 

D O U B L E

Nom:S 2718 R.A.: 20h.40m.

Dec: 12º33'

Mag: 8.0, 8.0 Sep.: 8.4" P.A.: 87º Nat:f Spec.:A, F
AOC: 223 DSC: 158 D.D.S.:19h.51m.(UT); 30-Sep.-1984 (prism)

sigma2718

       NOTE: One is in a rich zone; it is one precious double, of identical magnitude, and not very separated, it is unfolded with 50x, the main one is white and the secondary one is yellow.

 

D O U B L E

Nom:S 2664 R.A.: 20h.17m.

Dec: 12º51'

Mag: 8.4, 8.5 Sep.: 28" P.A.: 318º Nat:? Spec.:A, B
AOC: 356 DSC: 251 D.D.S.:21h.41m.(UT); 23-June-1985

sigma2664

        NOTE: One is in a rich zone; there is a smallest difference of magnitude, are very separated, his colors are similarities, To, B; it is unfolded without difficulty with the eyeglass of 50x.

 

D O U B L E

Nom: S 2670 R.A.: 20h.20m.

Dec: 16º13'

Mag: 8.1, 9.1 Sep.: 30" P.A.: 145º Nat:f Spec.:A, B
AOC: 357 DSC: 252 D.D.S.:21h.49m.(UT); 23-June-1985

sigma2670

        NOTE: One is in a rich zone; both components have the same magnitude, the main one is one weak double of brightness slightly separated the components of colors white, and blue the secondary one, is unfolded with 50x, is one pretty double.

 

D O U B L E

Nom:S 2690 R.A.: 20h.29m.

Dec: 11º05'

Mag: 7.1, 7.3 Sep.: 17" P.A.: 255º Nat:? Spec.:A, F
AOC: 363 DSC: 255 D.D.S.: 23h.16m.(UT); 23-June-1985

sigma2690

        NOTE: One is in a rich zone; both components have the same magnitude, the main one is one weak double of brightness slightly separated the components of colors white, and blue the secondary one, is unfolded with 50x, is one pretty double.

 

D O U B L E

Nom: S 2722 R.A.: 20h.41m.

Dec: 19º33'

Mag: 8.4, 8.9 Sep.: 7.1" P.A.: 309º Nat:f Spec.: K, B
AOC: 364 DSC: 256 D.D.S.: 23h.23m.(UT); 23-June-1985

sigma2722

        NOTE: One is in a rich zone; there is a slight difference of magnitude, are something separated, the main one is orange, however, the secondary one is bluish, is unfolded without difficulty with the eyeglass of 50x.

 

D O U B L E

Nom: S 2735 R.A.: 20h.53m.

Dec: 04º20'

Mag: 6.3, 7.9 Sep.: 2.1" P.A.: 284º Nat:f Spec.:K, M
AOC: 366 DSC: 258 D.D.S.:23h.40m.(UT); 23-June-1985

sigma2735

            NOTE: One is in a very rich zone; there is a remarkable difference of magnitude, are very together, the main one is orange, however, the secondary one is red, is one pretty double that is unfolded with little difficulty with 100x.

 

D O U B L E

Nom: S 2738 R.A.: 20h.56m.

Dec: 16º15'

Mag: 7.6, 8.5 Sep.: 15" P.A.: 254º Nat:f Spec.:A, K
AOC: 368 DSC: 260 D.D.S.: 23h.51m.(UT); 23-June-1985

sigma2738

      NOTE: One is in a rich zone; there is a remarkable difference of magnitude, are together, is unfolded with 50x.

 

 

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