ori.gif (1448 bytes)

C E P H E U S

 

ori.gif (1448 bytes) Mythology and history

Mythology of Cepheus

    Of the Greek Khfeus, he was king of the Cefenos, a town that usually is located in Ethiopia. He was husband of Casiopea and father of Andrómeda. To their death, as much Cefeo as their wife was transformed by Posidón in constellations. The throne of Cefeo happened to hands of Perses, the son of Perseo and Andrómeda. 

 

 

ori.gif (1448 bytes) Characteristics

          Cepheus is a precious constellation of 600º square of firmament that throughout is in the North hemisphere in visible the circumpolar zone the year in the North and practically invisible hemisphere from the south to austral average latitudes. It limits the north with the Little Bear or Ursa Minor and therefore with the Polaris star; to the east with the constellation of Draco (the Dragoon), to the south with Cygnus and Lacerta and to the west with Cassiopea and Camelopardalis.

        The Milky Way crosses the constellation by its bordering southern zone with Lacerta, for that reason we pruned to also observe pretty stellar accumulations and precious doubles; therefore the zone is very rich in stars and poor man therefore, in galaxies. In nights I am transparent and without Moon it affects to see Cepheus surrounded by stellar clouds of star dust that fluctuates giving the mobility sensation.

         Cepheus was located the 17 of April of 1982 when it had 14 years of age.

Constellation of Cepheus

 

Main stars

       Alpha, a; of magnitude 2.47, denominated Alderamin, that in Arab means the right arm, although in fact it corresponds to the back of the Ethiopian sovereign. White, is to 48 years light.

      Beta, b; denominated Alfrik that also means flock and the vertex marking the bust of king Cefeo. Of 3.23 magnitude and blue color one is in the center of the constellation. Light is to 595 years, comprises of an orbital double system whose companion of magnitude eighth is to 14"of arc, that corresponds to more than 4,300 astronomical Units.

    Gamma, g; Alrai call, is already in the vertex of the constellation near the celestial North Pole, of magnitude 3.22 and orange color is to 13.80 years light.

    Delta, d; of magnitude 4.07, variable and prototype of the variable stars denominated cefeidas by its characteristic curve of light that press in dimensions and luminosity with exactly equal periods, happening from the 3.60 to the 4.30 in little more than five days. Light of us is to 980 years. Another well-known cefeida is h Aquilae whose curve of light I made several years ago that you can see in the Web.

     Mú, m; of magnitude 4.20, variable of reddish color ruby which causes that it seems a luminous drop of purple and was what called W. Herschel that denominated garnet star. It is a supergiant, 1,500 times greater than our Sun, variables of the Mira type that oscillates in periods between 90 and 4,700 days. Light of us is to about 5,300 years. Its curve of light I made it in the summer of 1988 whose data you can observe in the Web.

 

Other objets

             NGC 188; of magnitude 8.10 one is in the North limit of the constellation next to Polaris. Formed by more than 150 stars from the tenth magnitude in ahead. It has an angular diameter of 13' of arc and Earth light is to 5,000 years.  It has an age of 5 billion years.

            NGC 6939, stellar accumulation formed by eighty stars of magnitudes between 10º and 12º and located to 16,000 years light. It has an age of thousand eight hundred million years.         

 

ori.gif (1448 bytes) Observations by telescope

D O U B L E

Nom:k R.A.: 20h.10m.

Dec: 77º34'

Mag: 4.5, 8.4 Sep.: 7.4" P.A.: 124º Nat:f Spec.:B, A
AOC: 544 DSC: 392 S.D.D.: 00h.56m.(UT);23-Mar.-1986

kappa

    NOTE: One is in a poor zone; there is a great difference of magnitude, his separation is optimal, the main one is bluish, however, the secondary one is white, is unfolded without difficulty with the eyeglass of 50x.

 

D O U B L E

Nom: b R.A.: 21h.28m.

Dec: 70º20'

Mag: 3.4, 8.2 Sep.: 14" P.A.: 250º Nat:f Spec.: B, A
AOC: 545 DSC: 393 S.D.D.:01h.03m.(UT);23-Mar.-1986

beta

 

      NOTE: One is in a poor zone; there is a great difference of magnitude between the components, however, the separation is ideal, which causes that the set is showy, the colors are similarities, easy to identify is unfolded without difficulty with the eyeglass of 50x.

D O U B L E

Nom:x AB R.A.: 22h.02m.

Dec: 64º38'

Mag: 4.6, 6.5 Sep.: 8.0" P.A.: 275º Nat:O Spec.:A, G
AOC: 606 DSC: 421 S.D.D.:23h.37m.(UT);14-June-1986

zeta

    NOTE: One is in a rich zone; there is a slight difference of magnitude, are little separated, it is one pretty double, it is unfolded without difficulty with the eyeglass of 50x, component C of magnitude 12,6 is invisible with the R-90mm.

D O U B L E

Nom:S 2883 R.A.: 22h.09m.

Dec: 69º53'

Mag: 5.8, 8.8 Sep.: 14" P.A.: 253º Nat:? Spec.: B, M
AOC: 607 DSC:422 S.D.D.:23h.37m.(UT);14-June-1986

D O U B L E

Nom:No catalog. R.A.: 22h.11m.

Dec:69º 35'

Mag: 7.0, 7.5 Sep.: 30" P.A.: 210º Nat:? Spec.: B, B
AOC:608 DSC:423 S.D.D.:23h.48m.(UT);14-June-1986

Sigma 2883 y CED 423

    NOTE: S 2883: One is in a rich zone; there is a great difference of magnitude, are together, the main one is bluish, however, the secondary one I see it red, easy to locate is unfolded with the eyeglass of 50x.

D O U B L E

Nom:S 2893 R.A.: 22h.12m.

Dec: 73º04'

Mag: 6.0, 7.6 Sep.: 29" P.A.: 348º Nat:f Spec.: K, B
AOC: 609 DSC: 424 S.D.D.: 23h.57m.(UT);14-June-1986

    NOTE: S 2883: One is in a rich zone; there is a great difference of magnitude, are together, the main one is bluish, however, the secondary one I see it red, easy to locate is unfolded with the eyeglass of 50x.

D O U B L E

Nom: d R.A.: 22h.27m.

Dec: 58º10'

Mag: 4(v),7.5 Sep.: 41" P.A.: 191º Nat:? Spec.:B,A
AOC: 610 DSC: 425 S.D.D.:00h.08m.(UT);15-June-1986

delta

    NOTE: One is in a rich zone; the magnitude difference is appreciable although the main one is the cefeida prototype of, the colors are not distinguished very well, is unfolded without difficulty with the eyeglass of 50x.

D O U B L E

Nom:Arg R.A.: 21h.11m.

Dec: 58º42'

Mag: 8.1,9.3 Sep.: 37" P.A.: 195º Nat:f Spec.:A,B
AOC: 611 DSC: 426 S.D.D.: 21h.30m.(UT);01-July-1986

arg

    NOTE: One is in a very rich zone; its identification is difficult due to the little brightness that it has, is a remarkable difference of magnitude, the colors are difficult to identify, seems to me that they are To, B; it is unfolded with 50x without difficulty.

D O U B L E

Nom:S 2768 R.A.: 21h.05m.

Dec: 58º48'

Mag: 8.5,8.7 Sep.: 5.0" P.A.: 246º Nat:f Spec.:A,B
AOC: 612 DSC: 427 S.D.D.: 21h.36m.(UT);01-July-1986

sigma2768

   NOTE: One is in a rich zone; there is a slight difference of magnitude, are together, the colors are similarities, it is one very pretty double, is unfolded with the one of 50x, although one is due to fix to unfold it.

D O U B L E

Nom:S 2764 R.A.: 21h.04m.

Dec: 61º57'

Mag: 8.1,8.5 Sep.: 7.1" P.A.: 299º Nat:f Spec.: B,?
AOC: 613 DSC: 428 S.D.D.: 21h.40m.(UT);01-July-1986

sigma2764

    NOTE: One is in a very rich zone; there is a small difference of magnitude, are together, is unfolded without difficulty with the eyeglass of 50x, is one pretty double, the main one is bluish, however, secondary the profit not to identify his color.

D O U B L E

Nom:A 756 R.A.: 20h.56m.

Dec: 58º38'

Mag: 7.7,9.2 Sep.: 55" P.A.: 197º Nat:? Spec.:B,K
AOC: 614 DSC: 429 S.D.D.: 21h.47m.(UT);01-July-1986

a756

    NOTE: One is in a rich zone; there is a slight difference of magnitude, are very separated, almost 1'; the main one is bluish, however, the secondary one I believe that she is orange, although am not absolutely safe, it is identified and it is unfolded without difficulty with the eyeglass of 50x.

D O U B L E

Nom:h 1659 R.A.: 21h.31m.

Dec: 58º26'

Mag: 8.6,9.2 Sep.: 7.2" P.A.: 298º Nat:f? Spec.:A,B
AOC: 813 DSC: 608 S.D.D.: 22h.15m.(UT);29-June-1987

D O U B L E

Nom:S 2810 R.A.: 21h.33m.

Dec: 58º52'

Mag: 8.3,8.8 Sep.: 17" P.A.: 289º Nat:f Spec.:A,B
AOC: 814 DSC: 609 S.D.D.: 22h.16m.(UT);29-June-1987

h1659

           NOTE: h 1659: There is a difference of appreciable magnitude, are slightly separated, although it is unfolded without difficulty with the eyeglass of 50x, the main one I see white it, however, the secondary one, has a tonality smooth blue color.

        S 2810: One is to 30' to the north and 2' to the west of h 1659; a small difference of magnitude exists, are slightly separated, is unfolded without difficulty with the eyeglass of 50x.

 

D O U B L E

Nom:13 H R.A.: 21h.37m.

Dec: 57º16'

Mag: 6.0, 8.0, 8.3 Sep.(AB): 12"

Sep.(AC):19"

A.P.(AB): 121º

A.P.(AC): 339º

Nat(AB):f

Nat(AC): f?

Spec.:O, B, K
AOC: 815 DSC: 610 S.D.D.: 22h.20m.(UT);29-June-1987

D O U B L E

Nom: S 2819 R.A.: 21h.38m.

Dec: 57º21'

Mag: 7.3,8.4 Sep.: 13" P.A.: 57º Nat:? Spec.:A,A
AOC: 816 DSC: 611 S.D.D.: 22h.20m.(UT);29-June-1987

13h

           NOTE: 13H: It is a fantastic triple; it does not give more, the two first components are blue, however, third she is orange, giving a very pretty resistance, are slightly separated, unfolds all the components with the eyeglass of 50x.

        S 2819: It is one pretty double, is a remarkable difference of magnitude, between his components, are slightly separated, is unfolded without difficulty with the eyeglass of 50x, both are white

 

D O U B L E

Nom:b 687 AC R.A.: 21h.37m.

Dec: 55º34'

Mag: 8.5,9.0 Sep.: 54" P.A.: 204º Nat:? Spec.:A,A
AOC: 817 DSC: 612 S.D.D.: 22h.26m.(UT); 29-June-1987

b687

    NOTE: One is in a poor zone in stars; there is a small difference of magnitude between his components, are very separated, almost 1', both are white, is unfolded without difficulty with the pretty eyeglass of 50x. is one double.

D O U B L E

Nom:S 2840 R.A.: 21h.50m.

Dec: 55º35'

Mag: 5.8,6.6 Sep.: 18" P.A.: 196º Nat:? Spec.:B,A
AOC: 818 DSC: 613 S.D.D.: 22h.29m.(UT);29-June-1987

sigma2840

        NOTE: One is in a partially rich zone; there is a slight difference of magnitude, are slightly separated, is unfolded with 50x, the main one has a bluish tonality, however, the secondary one is white; with respect to his nature it is possible to mention that they approach very slowly for his distance, approximately 1"by century, can be a very elongada orbit.

D O U B L E

Nom:S 2873 R.A.: 22h.00m.

Dec: 82º38'

Mag: 7.0,7.3 Sep.: 14" P.A.: 89º Nat:? Spec.:A,K
AOC: 819 DSC: 614 S.D.D.: 22h.34m.(UT);29-June-1987

sigma2873

    NOTE: One is in a partially rich zone; there is a small difference of magnitude, are slightly separated, is unfolded with the eyeglass of 50x, the main one is white, however, the secondary one is bluish.

 

C L U S T E R

NGC:7160

M:--

R.A.: 21h.51m.

Dec: 62º24'

Mag:7.3

Dim:15' AOC: 820 NCOC: 207
S.D.D.: 22h.41m.(UT);29-June-1987  

ngc7160

        NOTE: One is in a partially rich zone; it is formed by fourteen stars, all of them of the seventh and average magnitude, oriented in an angle of position of 150º approximately, having a dimension of 15'.

C L U S T E R

IC: 1396

M:--

R.A.: 21h.37m.

Dec: 57º16'

Mag:5.1

Dim:50'x15' AOC: 821 NCOC: 208
S.D.D.:22h.49m.(UT);29-June-1987  

N E B U L A E

IC: 1396

M:--

R.A.:21h.37m.

Dec: 57º16'

Mag:?

Dim:5'x15' AOC: 822 NCOC:209
S.D.D.: 22h.58m.(UT);29-June-1987  

ic1396

    NOTE: One is in a partially rich zone; the stellar accumulation is formed by a forty and eight stars of 5º and 6º magnitude, is a very pretty stellar accumulation, in her is immersed the fantastic trible 13H. In the accumulation a weak nebular nucleus is immersed and diffuse but visible, it is to 10' to the north of the triple and has a dimension of 5'x15'.

D O U B L E

Nom:OS 480 R.A.: 22h.44m.

Dec: 57º48'

Mag: 7.8,9.0 Sep.: 31" P.A.: 115º Nat:? Spec.:A,B
AOC: 823 DSC: 615 S.D.D.: 23h.04m.(UT);29-June-1987

C L U S T E R

NGC:7380

M:--

R.A.: 22h.45m.

Dec: 57º50'

Mag: 8.3

Dim:10' AOC: 824 NCOC: 210
S.D.D.: 23h.07m.(UT);29-June-1987  

osigma480

    NOTE: OS 480: One is in a partially rich zone; one is to 15' to the east of stellar accumulation NGC 7380; there is a slight difference of magnitude, are slightly separated.

 

 

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 2004-01-31