ori.gif (1448 bytes)

H Y D R A

 

ori.gif (1448 bytes) Mythology and history

Mythology of Hydra

        In the second task of Hercules, the Hydra de Lerna was a serpent multicéfala daughter of Tifo'n and Equidna. Their cut heads reproduced the being, and exhalaban a vapor able to kill all the one that was close. Hercules, containing the breathing, began to fight against hidra squashing his heads with a mace. Hera sent an enormous crab so that it helped hidra, but Hercules squashed it with the foot. Escudero Yolao of Hercules went in its aid and while this one cut the heads with a Yolao sword burned the wounds with a torch to avoid that they reproduced. After giving death to the Hydra and unravelling it, it wet his arrows in hiel of the monster, from then the smallest wound than these arrows caused would be lethal.

 

ori.gif (1448 bytes) Characteristics

          

Hydra, precious equatorial constellation that crosses great part of the celestial vault, begins next to the winter constellations entering themselves in the primaverales constellations and limiting in its western sector with the summery constellations. It is a parallel constellation very extended to the equator of the Milky Route limiting the south of the same one. The constellation of Hydra is observable during the months of winter until the beginning of the summer, but depending on the months sectors different from the constellation are observed. It is not characterized by stars shining, rather weak of the second magnitude with the exception of alpha of magnitude 1.99 located in the bordering Eastern sector with Cancer and Monozeros.

  Hydra in its Eastern sector limits the north with Cancer, Leo and Sextans, to the east with Canis Minor and Monoceros and to the south with Puppis, Pyxis and Antlia. On the other hand, in his western sector it limits the north with the Crater constellations, Corvus and Virgo, to the south with Centaurus and the west with the constellation of Libra.

             Hydra I located the 1 of January of 1982 at the age of 14 years from the Majorcan locality of Inca, Majorca, Spain to it.

 

Constellation of Hydra

 

Main stars

       Alpha, a; denominated Alfard, of orange magnitude 1.99 of color. Light of us is to 177 years. It is 400 times more luminous than our Sun is in the Eastern sector of the constellation to the south of the head of the Hydra.

      Beta, b; of magnitude 4.29 and blue color. One is located in the center of the constellation, to the south of the constellation of Corvus. Earth light is to 365 years. It is a star 200 times more luminous than our Sun.

    Gamma, g; of magnitude 3.0, one is closely together located in the western sector of the same one of the constellation of Virgo and next to Pound, of yellow color as our Sun is to 132 years Earth light.

Other objects

           M 48; precious cluster located closely together of the constellation of Monoceros and like so next to the Milky Route; of joint magnitude of 5,80; is  2000 years Earth light; it is formed by stars from the novena to the decimatercera magnitude; it has an angular diameter of 54' of arc. It has an age of 300 million years.

 

ori.gif (1448 bytes) Observations by telescope

D O U B L E

Nom:17 R.A.: 08h.53m.

Dec: -07º46'

Mag: 6.8,6.9 Sep.: 4.5" P.A.: Nat:f Spec.:A,F
AOC: 474 DSC: 336 D.D.S.: 01h.02m.(UT); 15-Dic.-1985

17

 

          NOTE: One is in a rich zone; there is a smallest difference of magnitude are together, his phantoms are similarities, is unfolded without difficulty with the eyeglass of 50x.

 

D O U B L E

Nom:S 585 R.A.: 08h.53m.

Dec: -18º03'

Mag: 5.9,7.1 Sep.: 67" P.A.: 147º Nat:op Spec.:K,B
AOC: 475 DSC: 337 D.D.S.: 01h.07m.(UT); 15-Dic.-1985

s585

     

           NOTE: One is in a zone, very very poor; a remarkable difference of magnitude between the components exists, the main one is orange, however, the secondary one is bluish; quite separated, it is unfolded without difficulty with the eyeglass of 50x.

 

D O U B L E

Nom:27 R.A.: 09h.18m.

Dec: -09º21'

Mag: 5.0, 7.0, 9.2 Sep.(AB): 9.6"

Sep.(BC): 6.2"

P.A.(AB): 197º

P.A.(BC): 319º

Nat(AB):op

Nat(BC): ?

Spec.:K, A, B
AOC: 477 DSC: 339 D.D.S.: 01h.17m.(UT); 15-dic.-1985

27

         

       NOTE: One is in a zone not very rich; there is a great difference of magnitude between components AB, in addition, are together although it is unfolded with 50x, on the other hand, pair BC its deployment is more difficult to be next than AB, although, also, is unfolded with the same eyeglass; the main one is orange, however, the secondary one is white and tertiary the bluish one, everything a cocktail. One is a pretty and peculiar triple.

 

D O U B L E

Nom:t1 R.A.: 09h.25m.

Dec: -02º25'

Mag: 5.0,7.5 Sep.: 65" P.A.: Nat:op Spec.:K,B
AOC: 519 DSC: 369 D.D.S.: 19h.51m.(UT); 15-March-1986

tau1

 

                NOTE: One is in a rich zone; there is a great difference of magnitude between the components, are very separated, slightly superior to 1'; the main one is orange, however, the secondary one is bluish; it is unfolded with the eyeglass of 50x.

 

D O U B L E

Nom:S 1347 R.A.: 09h.21m.

Dec: 03º43'

Mag: 7.1,8.1 Sep.: 21" P.A.: 312º Nat:? Spec.:K,B
AOC: 520 DSC: 370 D.D.S.:19h.57m.(UT); 15-March-1986

sigma1347

 

            NOTE: One is in a poor zone; there is a slight difference of magnitude, are little separated, although it is unfolded without difficulty with 50x, the main one is orange, however, the secondary one is bluish. One is a pretty double.

 

 

D O U B L E

Nom:Arg 26 R.A.: 13h.20m.

Dec: -22º41'

Mag: 8.6,8.6 Sep.: 28" P.A.: 79º Nat:? Spec.:A,A
AOC: 531 DSC: 379 D.D.S.: 00h.41m.(UT); 16-March-1986

arg26

 

            NOTE: One is in a very poor zone; both components have the same magnitude, are not very separated, is unfolded with 50x; both, also, are white.

 

 

D O U B L E

Nom:S 1309 R.A.: 09h.04m.

Dec: -03º01'

Mag: 8.5,8.7 Sep.: 11" P.A.: 274º Nat:f Spec.:K,A
AOC: 532 DSC: 380 D.D.S.:19h.18m.(UT); 16-March-1986

sigma1309

 

            NOTE: One is in a poor zone; there is a smallest difference of magnitude between the components that are slightly together, is unfolded with 50x, being observed main orange and the secondary white.

 

 

C L U S T E R

NGC:2548

M:48

R.A.: 08h.11m.

Dec: -05º35'

Mag:5.3

Dim:30' AOC: 550 COCN: 155
D.D.S.: 20h.54m.(UT); 1-April-1986  

M48

 

            NOTE: It is a shining cluster, is formed by 65 stars located in a space of 30'; its form is irregular, is scaled in brightness in two groups, aligned of irregular form. Most shining 110º and 160º are aligned in angle of position of; parsecs is to 610, has a strong concentration towards the center and an age of 300 million years.

 

D O U B L E

Nom:54 R.A.: 14h.43m.

Dec: -25º14'

Mag: 5.3,7.5 Sep.: 8.5" P.A.: 125º Nat:op? Spec.:A,K
AOC: 582 DSC: 407 D.D.S.: 21h.43m.(UT); 2-May.-1986

54

 

      NOTE: One is in a poor zone; there is a slight difference of magnitude, are not very separated, the main one I see white it, however, secondary orange, the easy one to locate it is unfolded with the eyeglass of 50x.

 

D O U B L E

Nom:Sh 110 R.A.: 10h.02m.

Dec: -17º52'

Mag: 5.9,7.2 Sep.: 21" P.A.: 274º Nat:? Spec.:A,B
AOC: 723 DSC: 523 D.D.S.: 00h.23m.(UT); 1-Feb.-1987

sh110

 

            NOTE: One is in a partially poor zone; there is a slight difference of magnitude, the distance that separates to them is ideal, the main one is white and secondary the bluish one, is one double pretty, easy to locate, is unfolded with the eyeglass of 50x.

 

D O U B L E

Nom:S 1474 R.A.: 10h.45m.

Dec: -15º00'

Mag: 6.8, 7.3, 7.8 Sep.(AB): 70"

Sep.(BC): 6.7"

P.A.(AB): 24º

P.A.(BC): 197º

Nat(AB):f

Nat(BC): ?

Spec.:?, ?, ?
AOC: 724 DSC: 524 D.D.S.: 00h.30m.(UT); 1-Feb.-1987

D O U B L E

Nom:S 1473 R.A.: 10h.45m.

Dec: -15º20'

Mag: 7.8, 8.5 Sep.: 31" P.A.: 10º Nat:? Spec.:A,K
AOC:725 DSC:525 D.D.S.:00h.30m.(UT); 1-Feb.-1987

sigma1474

 

            NOTE: S 1474: One is in a partially rich zone; one is a triple easy to locate, exists a difference of appreciable magnitude in pair AB; in addition, the distance that separates to them very is elevated, slightly superior to 1'; profit not to identify the colors of both components, easy to locate, is unfolded with 50x. Pair BC separates an appreciable difference to them of brightness, is enough more close than the previous one, although, also, is unfolded with 50x; the colors I cannot appreciate them. As a whole it is a pretty triple.

        S 1473: One is to 20' to the north of S1474; one is the one double prettiest one than the previous one; there is a remarkable difference of brightness between the components, are slightly separated, the main one is white, however, the secondary one I see it orange.

 

D O U B L E

Nom:S 618 R.A.: 10h.54m.

Dec: -20º52'

Mag: 8.7,8.9 Sep.: 79" P.A.: 37º Nat:op Spec.:?,?
AOC: 726 DSC: 526 D.D.S.: 00h.39m.(UT); 1-Feb.-1987

s618

 

        NOTE: One is in a star field, very very poor; there is the smallest one but appreciable difference of brightness, is very separated what entails that is an optimal pair, I have not managed to identify the colors of its components, easy to locate is unfolded with the eyeglass of 50x.

 

D O U B L E

Nom:N R.A.: 11h.29m.

Dec: -29º00'

Mag: 5.8,5.9 Sep.: 9.2" P.A.: 210º Nat:f Spec.:A,A
AOC: 727 DSC: 527 D.D.S.: 00h.43m.(UT); 1-Feb.-1987

N

           

            NOTE: One is in a very poor zone; a small difference of brightness between the components exists, both components are white, is one double very pretty, easy to locate is unfolded with the eyeglass of 50x.

 

D O U B L E

Nom:D 116 R.A.: 11h.54m.

Dec: -32º00'

Mag: 8.2,8.2 Sep.: 19" P.A.: 260º Nat:' Spec.:?,?
AOC: 728 DSC: 528 D.D.S.: 00h.47m.(UT); 1-Feb.-1987

Delta 116

           

            NOTE: One is in a very poor zone; both components have the same magnitude are slightly separated, is one very pretty double, the pain is that it has a so austral inclination and, also, the magnitude of the components; easy to locate, it is unfolded with 50x.

 

 

D O U B L E

Nom: S 1355 R.A.: 09h.25m.

Dec: 06º27'

Mag: 7.5,7.5 Sep.: 2.5" P.A.: 350º Nat:ph Spec.:M,A
AOC: 749 DSC: 548 D.D.S.: 22h.20m.(UT); 26-Feb.-1987 (prisma)

sigma1355

 

       NOTE: One is in a quite poor star field, both components have the same magnitude, one is one double tight one, is unfolded with 200x, for which to observe main red and the secondary white; it does not present/display difficulty at the time of unfolding it.

D O U B L E

Nom:No catalg. R.A.: 09h.29m.

Dec: 01º35'

Mag: 9.0,9.5 Sep.: 10" P.A.: 180º Nat:? Spec.:?,?
AOC: 750 DSC: 549 D.D.S.: 22h.28m.(UT); 26-Feb.-1987 (prisma)

D O U B L E

Nom: S 1365 R.A.: 09h.29m.

Dec: 01º40'

Mag: 7.4,8.5 Sep.: 3.5" P.A.: 153º Nat:ph Spec.:?,?
AOC: 751 DSC: 550 D.D.S.: 22h.28m.(UT); 26-Feb.-1987 (prisma)

sigma1365

 

          NOTE: S 1365: One is in a quite poor zone in stars, is one double tight one, I have unfolded it with 200x; there is an appreciable difference of magnitude, by his weakness of brightness I have not managed to identify the colors.

        CED 549: One is one catalogued but not identified double in Sky Catalogue 2000,0 of Sinnot; one is to 5' to the south of S1365; it is formed by very weak components, the distance that separates to them can be considered ideal, is one pretty double, like in the previous case, I have not managed to identify the colors, easy to locate, is unfolded with the eyeglass of 50x.

 

D O U B L E

Nom: S 1255 R.A.: 08h.40m.

Dec: 05º46'

Mag: 7.5,8.6 Sep.: 26.5" P.A.: 31º Nat:? Spec.:G,B
AOC: 911 DSC: 693 D.D.S.: 22h.02m.(UT); 4-March-1989 (prisma)

sigma1255

 

            NOTE: One is in a rich zone; there is a slight difference of brightness between the components, are slightly separated, the main one I see white it and secondary the bluish one is unfolded without difficulty with the eyeglass of 50x.

 

D O U B L E

Nom:HN 49 R.A.: 13h.39m.

Dec: -26º30'

Mag: 5.9, 6.8, 10.0 Sep.(AB): 10.1"

Sep.(AD): 218.2"

P.A.(AB): 191º

P.A.(AD): 18º

Nat(AB):?

Nat(AD): op

Spec.: A,A,?
AOC: 923 DSC: 705 D.D.S.: 23h.09m.(UT); 1-April-1989

hn49

 

        NOTE: One is in a rich zone; there is a slight difference of brightness between components AB, are something separated unfolding itself with the eyeglass of 50x, both components I see them of white color. Component C is not visible since it has a magnitude of 11,3, the D is very separated and is very weak although visible with the R-90mm., noncollection its color.

 

 

ori.gif (1448 bytes) Other constellations

   Next in the following window you can select the constellation that you want to locate, to observe and to discover following with the thematic one of the Web of Masm.

Masm © Last update 2004-08-11)