Constellation Cepheus (King)

Cepheus
Cepheus: IAU Constellation Map [150]

Properties

The constellation Cepheus revolves around the celestial north pole, followed by Cassiopeia on its eastern side and stands for Central Europe in the sky all year round. Despite its importance in Greek mythology, Cepheus is a less prominent constellation to the naked eye. In a dark sky you can see a figure that resembles a child's drawing of a house with a gable roof. The southern part of the constellation stands in a branch of the band of the Milky Way. The area is 588 square degrees and the center culminates on September 29 at midnight. Cepheus contains one of the most important variable stars for modern astronomy: delta Cephei. [9, 15]

Stars with Proper Names:

  • α Cep: Alderamin, Alderaimin
  • β Cep: Alfirk, Alphirk
  • γ Cep: Alrai, Arrai, Errai, Er Rai
  • μ Cep: Herschel's "Garnet Star"
  • ξ Cep: Alkurhah, Al Kirdah, Kurhah
  • ρ2 Cep: Al Kalb Al Rai
Data for constellation Cepheus [150]
IAU NameCepheus
IAU GenitiveCephei
IAU Abbr.Cep
English NameKing
Season (47° N)May … December
Right Ascension20h 01m 56s … 09h 03m 20s
Declination+53° 21' 12" … +88° 39' 50"
Area588 deg2
Neighbours (N↻)UMi, Dra, Cyg, Lac, Cas, Cam

Deep-Sky Object Descriptions

Mythology and History

The constellation symbolizes Cepheus, the king of Ethiopia. He descended from Belos, the legendary Assyrian king. Cepheus' wife was the vain Cassiopeia, who boasted of being more beautiful than the nymphs of the sea. As punishment for Kassiopeia's vanity, the pretty princess Andromeda - daughter of this royal family in the sky - was chained to a rock by the sea to be sacrificed to the whale Cetus. The hero Perseus rode up through the air on Pegasus, freed Andromeda and married her. [82]

Catalogs

Yale Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991) [154]
HR B F RA [hms] Dec [dms] vMag spType dMag Sep ["]
7750κ120 08 53.3+77 42 414.39 B9III 3.87.3
7850θ220 29 34.9+62 59 394.22 A7III
7945420 43 11.0+66 39 275.58 A8V
7957η320 45 17.4+61 50 203.43 K0IV 8.251.7
8162α521 18 34.8+62 35 082.44 A7V 9.1206.8
8171621 19 22.2+64 52 195.18 B3IVe
8227721 27 46.1+66 48 335.44 B7V
8238β821 28 39.6+70 33 393.23 B1IV v4.613.4
8279921 37 55.2+62 04 554.73 B2Ib v
8316μ21 43 30.4+58 46 484.08 M2-Ia e8.319.5
83171121 41 55.3+71 18 414.56 K1III
8334ν1021 45 26.9+61 07 154.29 A2Ia
83391221 47 25.3+60 41 345.52 M1IIIb
83711321 54 53.2+56 36 415.80 B8Ib v
84001621 59 15.0+73 10 485.03 F5V 6.8131.4
84061422 02 04.6+58 00 025.56 O9Vn
84161822 03 52.9+63 07 115.29 M5IIIab
8417ξ1722 03 47.4+64 37 404.29 A3/6Vm 2.07.7
84262022 05 00.5+62 47 085.27 K4III
84281922 05 08.9+62 16 485.11 O9.5Ib 5.660.4
8465ζ2122 10 51.3+58 12 043.35 K1.5Ib
84682422 09 48.4+72 20 284.79 G7II-III
8469λ2222 11 30.7+59 24 525.04 O6I(n)fp
8494ε2322 15 02.0+57 02 374.19 F0IV 5.3127.8
85112522 18 12.7+62 48 165.75 K3III
85612622 27 05.3+65 07 565.46 B0.5Ibe:
8571δ2722 29 10.3+58 24 553.75 F5Ib-G2Ib v2.440.8
8578ρ12822 26 42.5+78 47 095.83 A2Vm
8591ρ22922 29 52.9+78 49 275.50 A3V
86153122 35 46.1+73 38 355.08 F3III-IV
86273022 38 39.0+63 35 045.19 A3IV
8694ι3222 49 40.8+66 12 023.52 K0-III
8819π3323 07 53.9+75 23 154.41 G2III 2.21.0
8872ο3423 18 37.5+68 06 424.75 K0III 2.33.1
8974γ3523 39 20.8+77 37 573.21 K1III-IV

Revised+Historic NGC/IC, Version 22/9, © Dr. Wolfgang Steinicke [277]
Planetary Nebulae
NameRADecTypebMagvMagDimDreyer DescriptionIdentification, Remarks
NGC 4000 13 01.0+72 31 21PN10.712.31.23F, vS, R, vsmbM, * 12 spPK 120+9.1, CS=10.6
NGC 707621 26 24.1+62 53 30PN14.513.50.93vF, erPK 101+8.1, Abell 75, CS=18.0
NGC 713921 46 08.4+63 47 32PN13.013.31.28vF, cS, R, rPK 104+7.1, CS=18.1
NGC 735422 40 20.0+61 17 10PN12.912.20.6planetary, B, S, R, pgvlbMPK 107+2.1, CS=15.0
IC 145422 42 24.5+80 26 35PN14.814.00.63vF, S, * 7 m 4' fPK 117+18.1, Abell 81, CS=18.0
Galactic Nebulae
NameRADecTypebMagvMagDimDreyer DescriptionIdentification, Remarks
NGC 702321 01 35.5+68 10 10EN7.110 × 8* 7 in eF, eL nebyLBN 487, OCL 235
NGC 712921 42 58.9+66 06 47EN11.57 × 7!, cF, pL, gbM ***IC 5134, LBN 497, OCL 240
NGC 753823 13 38.0+61 30 42EN9 × 6vF, L, 2 pB st invLBN 542, Sh2-158
NGC 782200 03 36.0+67 09 00EN100! eeF, eeLLBN 583, CED 214A, in Sh2-171
IC 139621 38 54.0+57 29 20EN170 × 140Neb part of M. WayLBN 451/452, SG 1.19
IC 1396 A21 35 30.0+57 23 00EN14 × 2Neb part of M. WayLBN 452
IC 1396 B21 34 30.0+57 28 00EN12 × 4Neb part of M. WayLBN 451
IC 147023 05 10.4+60 14 32EN1 × 1vF, vS, stellar N north edgeCED 208, Sh2-156
IC 513221 42 40.1+66 10 06EN2 st 13 magn in vF nebLBN 497
IC 513321 42 47.1+66 10 52EN2 st 13 magn in vF nebLBN 1181
Open Clusters
NameRADecTypebMagvMagDimDreyer DescriptionIdentification, Remarks
NGC 18800 47 30.0+85 15 30II2r8.115Cl, vL, R, 150-200 st 10…18OCL 309
NGC 693920 31 30.0+60 39 42I1m7.810Cl, pL, eRi, pCM, st 11…16OCL 217
NGC 714221 45 09.4+65 46 28II2r9.312Cl, cL, cRi, pC, st 11...14OCL 241
NGC 716021 53 40.2+62 36 12II3p6.15Cl, P, vlCOCL 236
NGC 722622 10 27.0+55 23 55I1p9.62pB, L, in clusterOCL 226
NGC 723422 12 24.0+57 16 24II3m8.67.76Cl, S, P, lCNGC 7235, OCL 229
NGC 726122 20 10.0+58 06 36III1p8.46Cl, L, pRi, lCOCL 237
NGC 728122 24 55.7+57 50 25IV2p12Cl, L, pRi, lC, st 10…16OCL 238
NGC 738022 47 21.0+58 07 54III3pn7.220Cl, pL, pRi, lC, st 9…13OCL 244, LBN 511
NGC 741922 54 20.0+60 48 56II3r13.06Cl, pRi, cCOCL 250
NGC 742322 55 06.5+57 05 41II3m5vF, pL, iF, erOCL 246
NGC 742922 56 00.0+59 58 24III2p15Cl, P, pC, st 9…11OCL 249
NGC 751023 11 04.2+60 34 08II2m7.97Cl, pRi, pC, fan-sh, st pBOCL 256
NGC 776223 50 00.0+68 02 18II2p10.015Cl, pRi, pC, st 11…15OCL 280
Galaxies
NameRADecTypebMagvMagDimDreyer DescriptionIdentification, Remarks
NGC 118403 16 45.3+80 47 35S0-a13.312.42.8 × 0.6F, pL, mEUGC 2583, MCG 13-3-2, CGCG 346-2, IRAS 03088+8035
NGC 154405 02 36.2+86 13 22S?14.213.31.3 × 0.9vF, vSUGC 3160, MCG 14-3-6, CGCG 361-11, CGCG 370-1A, KARA 143, NPM1G +86.0007, CGCG 362-4
NGC 227607 27 13.6+85 45 18SBc11.911.42.3 × 1.9F, 60", lbMUGC 3740, MCG 14-4-28, CGCG 362-42, IRAS 07101+8550, KCPG 127A, CGCG 363-27, Arp 25, Arp 114, 7ZW 134, near SAO 1148
NGC 230007 32 20.3+85 42 33E-S012.111.02.8 × 2pB, pL, lE, bMUGC 3798, MCG 14-4-31, CGCG 362-43, KCPG 127B, CGCG 363-29, Arp 114
NGC 694920 35 07.0+64 48 12S?14.713.81.4 × 1.2eF, pS, iRUGC 11600, MCG 11-25-1, CGCG 325-2, IRAS 20343+6437
NGC 695220 37 14.0+66 06 21SBbc11.610.73.9 × 3.2pB, oval, dif, * 15 close fNGC 6951, UGC 11604, MCG 11-25-2, CGCG 325-3, IRAS 20366+6555
IC 45507 34 57.7+85 32 16S014.313.31.1 × 0.7vF, eS, sf 2300UGC 3815, MCG 14-4-33, CGCG 362-44, CGCG 363-30, NPM1G +85.0020
IC 46907 55 59.3+85 09 31SBab13.512.72.2 × 1F, S, E, sf 2300UGC 3994, MCG 14-4-38, CGCG 362-47, IRAS 07419+8516, CGCG 363-35, CGCG 364-1
IC 150223 36 20.1+75 38 51S0-a14.813.91.1 × 0.3vF, S, vF * closeUGC 12706, UGC 12105, MCG 13-1-2, CGCG 344-3, CGCG 359-5, MCG 12-1-1

References

9«Drehbare Sternkarte SIRIUS» von H. Suter-Haug; Hallwag-Verlag, Bern
15«Hartung's Astronomical Objects for Southern Telescopes» by David Malin and David J. Frew; Melbourne University Press 1995; ISBN 0-522-84553-3
82The Starry Sky: Cepheus by Deborah Byrd; Astronomy 9/95, p.63
150IAU: The Constellations, 11. Oktober 2020; iau.org/public/themes/constellations
154Yale Bright Star Catalog, 15. Oktober 2020; tdc-www.harvard.edu/catalogs/bsc5.html
277«Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; klima-luft.de/steinicke (2021-02-17)