|Right ascension||01 h 29 m 38 s to 04 h 51 m 22 s|
|declination||+ 30 ° 55 ′ 19 ″ to + 59 ° 06 ′ 17 ″|
|Completely visible||90 ° N to 31.3 ° S|
|Observation time for Central Europe||autumn|
|Number of stars brighter than 3 mag||5|
|Brightest star (size)||Mirfak (1.79)|
clockwise from north )
The Perseus is a constellation of the northern sky. It is best seen in the autumn and winter skies and lies in the middle of the band of the Milky Way . Its northern stars look like an open star cluster to the naked eye .
In August the shooting stars of the Perseids seem to come from this constellation .
The constellation is said to represent the figure of the Greek hero Perseus , who defeated the deadly Medusa . The stars Mirfak, δ, ε and ζ form the body and a leg of Perseus. The star Algol represents the severed head of Medusa that he is holding in his hand.
The Milky Way runs through the constellation, although it is not very noticeable here, as numerous dark clouds weaken the light from the stars.
Perseus is one of the 48 classical constellations described by Ptolemy .
In Greek mythology , Perseus was the son of Zeus and Danaë . He defeated the deadly gorgon Medusa, whose gaze could turn any living being into stone, and cut off her head. Wearing winged shoes, he saved the beautiful Andromeda , who was to be sacrificed to the sea monster Ketos, chained to a rock , and got her as a wife as a reward.
Andromeda, together with her parents Cepheus and Kassiopeia , as well as the marine animal have also been immortalized in the sky as constellations near Perseus, the latter as the constellation whale (Cetus).
|B.||F.||Names or other designations||size||Lj||Spectral class|
|α||33||Mirfak (also Marfak or Algenib )||1.79 m||592||F5 Ib|
|β||26th||Algol||2.12 to 3.39 m||93||B8 V|
|ζ||44||2.9 m||about 1000||B1 Ib|
|ε||45||2.90 m||538||B0.5 V|
|γ||23||2.91 m||256||G8 III|
|ρ||25th||Gorgonea tertia||3.2 to 4.1 m||325||M3 III|
|η||15th||Miram||3.77 m||1331||K3 Ib|
|ν||41||3.77 m||557||F5 II|
|κ||27||Misam||3.79 m||112||K0 III|
|ο||38||Atik||3.84 m||1476||B1 III|
|τ||18th||3.93 m||248||G4 III|
|MX||3.96 m||554||B3 Ve|
|ξ||46||Menkib||4.0 m||about 1000||O7.5|
|φ||4.01 m||717||B2 Vpe|
|ι||4.05 m||34||G0 V|
|θ||4.10 m||37||F7 V|
|μ||4.12 m||723||G0 Ib|
|16||4.22 m||128||F2 III|
|58||4.25 m||642||G8 II|
|λ||4.25 m||347||A0 IVn|
|ψ||4.32 m||700||B5 Ve|
|σ||4.36 m||353||K3 III|
|17th||4.56 m||409||K5 III|
|b||4.60 m||318||A2 V|
|ω||Gorgonea Quarta||4.61 m||305||K1 III|
|34||4.67 m||559||B3 V|
|52||4.67 m||627||G5 II|
|π||Gorgonea Secunda||4.68 m||326||A2 Vn|
|k||4.77 m||205||K0 II-III|
|V469||4.80 m||464||B4 IV|
|HR 991||4.85 m||1476||K2 III|
|12||4.91 m||81||F9 V|
|54||4.93 m||226||G8 III|
|24||4.94 m||350||K2 III|
|32||4.96 m||155||A3 V|
|40||4.97 m||924||B0.5 V|
|HR 1034||4.99 m||570||B5 V|
|4th||4.99 m||740||B8 III|
|HR 969||5.04 m||834||G5 II|
|31||5.05 m||481||B5 V|
|V467||5.14 m||298||A3 V|
|29||5.16 m||528||B3 V|
|V474||5.16 m||2052||A2 Ia|
|43||5.28 m||133||F5 IV|
|59||5.30 m||271||A1 Vn|
|36||5.30 m||119||F4 III|
|HR 1011||5.32 m||625||B5 V|
|20th||5.34 m||235||F4 V|
|HR 1207||5.39 m||845||B6 V|
|14th||5.43 m||693||G0 Ib|
|HR 1330||5.46 m||259||A7 V|
|HR 885||5.47 m||558||G4p|
|V396||5.47 m||586||B8 IIIp Mn|
|30th||5.49 m||645||B8 V|
|HR 1215||5.49 m||971||B1.5 V|
|ε||2.9 / 7.4 m||8.8 "|
|ζ||2.9 / 9.4 m||12.9 "|
|η||3.9 / 8.5 m||28 "|
|57||6.1 / 6.8 m||122 "|
|β||2.12 to 3.39 m||2,867 days||Coverage variable|
|ρ||3.3 to 4.0 m||about 40 days||semi-regularly changeable|
Algol (β Persei), the second brightest star in Perseus, changes its brightness regularly over a period of 2 days and 21 hours. The decrease in brightness is caused by a weaker companion star that passes in front of the bright main star. Algol is the namesake of a type of eclipsing star .
Algol represents the eye of the mythological Medusa.
|34||1039||6 m||Open star cluster|
|76||650||9.0 m||Planetary nebula||Small dumbbell nebula|
|744||7.9 m||Open star cluster|
|869||4.5 m||Open star cluster||h Persei|
|884||4.5 m||Open star cluster||Chi Persei|
|1342||6.7 m||Open star cluster|
|Tr 2||5.9 m||Open star cluster|
|Mel 20||1.2 m||Open star cluster|
|957||7.6 m||Open star cluster|
|1333||5.6 m||Reflection fog|
|1444||6.6 m||Open star cluster|
|1499||5.0 m||Gas mist||California fog|
|1528||6.4 m||Open star cluster|
|1545||6.2 m||Open star cluster|
|1582||7.0 m||Open star cluster|
The two neighboring star clusters h and Chi Persei can be seen as foggy spots with the naked eye. They are about 7,500 light years away. Here, too, the most beautiful sight is offered in binoculars or in the telescope at low magnification, since both objects are then visible at the same time.
The open star cluster Melotte 20 (α Persei group) is the conspicuous cluster of stars around the main star Mirfak, which are already visible to the naked eye. Similar to the Hyades , this group forms a movement cluster (see also Sternstrom ) and is also part of an OB association .
NGC 1499 is an emission nebula with a shape reminiscent of the US state California . It is therefore also known as the “California Nebula”. Due to its low surface brightness, the fog is only visible in long-exposure photographs .
In addition, the weak meteor shower of the September Perseids still exists .