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A Q U A R I U S

 

ori.gif (1448 bytes) Mythology and history

Mitología de Aquarius

     Twenty centuries ago the signs of the zodiaco with the respective constellations agreed, the Sun at that time crossed Aquarius during the months of January and February, generally unstable and rainy periods in the countries of the Mediterranean and the zone of Mesopotamia.   Great part of the towns of those zones was constantly in contact with the enemy, for geographic reasons, with the sea or great rivers (Nile, Tigris, the Euphrates) where developed great part of their commercial activity. Of a form or another one, the element water was to them familiar & the verification which at those times the Sun returned to leave by the sky after to have touched its low point the more in its annual trajectory, easily lead to imagine the star to them radiating, in the act to leave the low regions of the water. Perhaps it is explained of this form, the reason of the numerous series of aquatic " constellations " that surrounds the winter way by the Sun and that, in addition to Aquarius includes the one of Capricornius, Cetus (the whale) and the fish (boreal as as much austral) without counting on larguísima constellation of Eridianus (the Po river), that goes almost until the celestial South Pole.    

 

ori.gif (1448 bytes) Characteristics

    Aquarius is the eleventh zodiacal asterism, the Sun crosses this constellation during the months of February & March, is visible a modest constellation rather and little located to the south of the equator celestial of about 1000 square degrees and easy to locate to locate between Fomalhaut to the south and the great quadrilateral of Pegasus to the north. It limits the north with Piscis, Pegasus, Equuleus & Delphinus; to the east with Aquila & the south with Capricornius, Piscis Austrinus & Scultor, and to the west with the constellation of Cetus.

    Aquarius is located to 50º to the south of the equator galactic, next to the galactic South Pole located in the constellation of Scultor. In her we will be able to observe little stellar density of shining stars and clusters but globular clusters & galaxies. We can observe at night towards during the months of the nine September & October

    Aquarius I located the August, 10th; 1982 when I was 16 years-old.

Constelación de Aquarius

 

Main stars

       Alpha, a ; denominated Sadalmelik , of magnitude 2.9 and yellow color. It's 760 light-years of us, it's a yellow giant 3000 times more luminous than our Sun.

      Beta, b ; Sadalsund named , of magnitude 2,90 and yellow color. Light is located to 670 years. It forms an optical pair whose secondary it has a magnitude of 11,0. Along with to Aquarii and e pegasi forms a triple stellar association of formation in the same diffuse nebula.  

     Gamma, g ; Sadachbia named , of magnitude 3.85, is to 160 years light of us and is of white color.

    Delta, d ; Skat named , and white color, it has a magnitude of 3.27, also is to about 160 years light, is member of the stellar group of Sirius, therefore, formed in the same nebula but dispersed by the firmament.

    Épsilon, e ; call, also, Al a Bali , of magnitude 3.77 and white color. Light of us is to 230 years, is a young star. 

Other objects

           M 2;   precious globular cluster, catalogued with nº 2 by Messier, of there in name of M 2 of magnitude 6.50, is very shining, giant, being able to solve its stars with a medium telescope; it has an angular diameter of 13' of arc,   and light of us is to 40,000 years.

         M 73; stellar cluster of magnitude 8.90, very poor in stars, without diffuse nebula associate, the most shining star has a magnitude of 10,0.

           Acuarids; they are meteror stars with radiating next to star d aquarii, are characterized by little shining slow meteors and of long trajectory and, it comprises of the complex of the radiating ones of the capricórnidas ones that can be observed at the end of July & principles of August. At the moment I have made several observations of the meteoric complex whose pages are available in the Web of Masm

ori.gif (1448 bytes) Telescopical observations

D O U B L E

Nom:S 2809 R.A.: 21m.35

Dec: -00º36'

Mag: 6.4,9.0 Sep.: 31" P.A.: 165º Nat:f Spec:?,?
AOC: 128 DSC: 96 D.of D.S.:16-June-1984

sigma2809

    NOTE: One is in a zone not very rich; it is identified easily by the magnitude of the main one, is one unequal double, therefore,   it causes that it is difficult to identify the secondary one, is unfolded with the eyeglass of 50x.

 

D O U B L E

Nom:S 2817 R.A.: 21h.40m.

Dec: 00º14'

Mag: 8.7,9.4 Sep.: 26" P.A.: 156º Nat:? Spec:G,M
AOC: 130 DSC: 97 D.of D.S.:17-June-1984

sigma2817

    NOTE: One is in a rich zone; although it is one weak double, it is easy his location, it exists a slight difference of magnitude, is unfolded with the eyeglass of 50x.

GLOBULAR CLUSTER

NGC:6981

M:72

R.A.:20h.51m.

Dec:-12º44'

Mag:9.8

Dim:2' AOC:157 C. of C.N.O.: 50
D.of D.S.:28-June-1984  

M 72

    NOTE: One is a quite weak globular accumulation, and difficult to identify, he is quite small and it is observed like a small one and light stellar cloud, the best image of the accumulation is obtained with the eyeglass of 200x.

 

PLANETARY NEBULAE

NGC:7009

M:--

R.A.:21h.01m.

Dec:11º34'

Mag:8.4

Dim:44"x26" AOC:158 C. of C.N.O.: 51
D.of D.S.: 28-June-1984  

ngc7009

    NOTE: One is a quite weak object, is easy his identification to be approximately to 1º to the north of M72; in the center of the planetary nebula the star is identified cause of such beauty, although he is observable with 50x, the best image we obtain it with 200x.

 

CLUSTER

NGC:6994

M:73

R.A.:20h.58m.

Dec:-12º50'

Mag:9.0

Dim:?' AOC: 159 C. of C.N.O.: 52
D.of D.S.:28-June-1984  

m73

    NOTE: One is to 1º to the E. of M72, is observed the stellar accumulation totally granulated, plagued of points or stars, with form of a precious stellar cloud, the best spectacle is observed with the eyeglass of 200x, although already he is detectable with the one of 50x.

 

D O U B L E

Nom: S 758 R.A.: 21h.21m.

Dec: -06º48'

Mag: 8.0,8.6 Sep.: 53" P.A.: 93º Nat:f Spec:G,B
AOC: 160 DSC: 108 D.of D.S.:28-June-1984

s758

    NOTE: He is pretty a double one, exists a slight difference of magnitude between the components, are separated, is unfolded without difficulty with the eyeglass of 50x.

 

GLOBULAR CLUSTER

NGC:7089

M:2

R.A.: 21h.32m.

Dec: -01º03'

Mag:6.3

Dim:8' AOC:161 C. of C.N.O.: 53
D.of D.S.:28-June-1984  

m2

    NOTE: It is a pretty globular cluster, is in a zone not very rich; but it is distinguished easily, it is observed two differentiated zones affluent corresponding to the nucleus, and the periphery of a color paler and less dense than the off-white nucleus and gradient.

 

D O U B L E

Nom:F R.A.: 23h.13m.

Dec: -09º22'

Mag: 4.1,9.1 Sep.: 50" P.A.: 312º Nat:op Spec:K,B
AOC: 448 DSC: 326 D.of D.S.:19h.40m.(UT);14-Dec.-1985

D O U B L E

Nom:S 2993 R.A.: 23h.11m.

Dec: -09º12'

Mag: 8.3,8.8 Sep.: 25" P.A.: 1771 Nat:? Spec:K,B
AOC: 449 DSC:327 D.of D.S.:19h.42m.(UT);14-Dec.-1985

fi & sigma 2993

    NOTE: F: One is in a poor zone; there is a great difference of magnitude, are very separated, the colors are different, the main one is orange, however, the secondary one is bluish, is most shining of the field, therefore, it does not exist difficulty at the time of finding it, is unfolded with the eyeglass of 50x.

    S 2993: It's to 15' to the east of fAquarii, has a slight difference of brightness between the components, is together, has seemed phantoms, B & To, it is one pretty double, it is unfolded without difficulty with the eyeglass of 50x.

 

D O U B L E

Nom:S 83App R.A.: 23h.02m.

Dec: -08º30'

Mag: 5.5,7.5 Sep.: 242" P.A.: 147º Nat:op Spec:A,K
AOC: 450 DSC: 328 D.of D.S.:19h.56m.(UT);14-Dec.-1985

sigma83ap

    NOTE: One is in a partially rich zone; there is a great difference of magnitude, are very separated, his colors are similarities, the main white, and secondary the orange; he is most shining of the field, therefore, it does not present/display difficulty at the time of identifying it, is unfolded with the eyeglass of 50x.

 

D O U B L E

Nom:h 5143 R.A.: 23h.41m.

Dec: -17º49'

Mag:4.9,7.7 Sep.: 120.1" P.A.: Nat:? Spec: G, B
AOC:868 DSC:652 D.of D.S.:21h.30m.(UT);23-Sep-1987

D O U B L E

Nom:107 R.A.: 23h.46m.

Dec: -18º41'

Mag: 5.7,6.7 Sep.: 6.6" P.A.: 136º Nat:? Spec: A, M
AOC: 869 DSC:653 D.of D.S.:21h.38m.(UT);23-Sep-1987

h5143 & 107 aquarii  

     NOTE: h5143: One is in a partially rich zone; there is a remarkable difference of brightness between the components, the main one I see yellow it, however, the secondary one seems to see it to me of blue color, are very separated, unfolding itself with the eyeglass of 50x.

    107: One is to 50' to the northeast of h 5143; the secondary one of red color exists a smaller difference of brightness between the components emphasizing, is unfolded without difficulty with the eyeglass of 50x. .

 

ori.gif (1448 bytes) Other constellations

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