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Per
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Persei
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Perseus
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3
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45
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615
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24th
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5
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&alpha Per (Mirfak)
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179
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"http://wwwseattleluxurycom/encyclopedia/entry/September_Perseids" class="copylinks">September Perseids
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"http://wwwseattleluxurycom/encyclopedia/entry/Camelopardalis" class="copylinks">Camelopardalis
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90
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35
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December
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is a northern
Constellation , named after the Greek hero who slew the monster
Medusa . It is one of
Ptolemy's 48 constellations and was also adopted by the
International Astronomical Union as one of the 88 modern constellations. It contains the famous
Variable Star Algol (β Per), and is also the location of the
Radiant of the annual
Perseids Meteor Shower .
- of this constellation is also called Algenib (a name which is used for other stars as well, e. g. γ Peg ). Mirfak (Arabic for ''elbow'') is a supergiant of Spectral Type F5 Ib with an Apparent Brightness of 1.79m lying at a distance of ca. 590 Light-years . Its Luminosity is 5,000 times and its diameter is 62 times that of our Sun.
- Medusa . This star is the prototype of a whole group of eclipsing Variable Stars . Its apparent brightness ranges between 2.12m and 3.39m with a period of merely 2.867 days. It is of spectral type B8 V and lies at a distance of only 93 ly.
- Nova Persei 1901 (GK Persei), a bright Nova discovered on February 23, 1901.
- h+χ Per: These two Open Clusters ( NGC 869 and NGC 884 respectively) belong to the most beautiful objects of the night sky for binoculars and small telescopes. Both lie at distances of more than 7,000 ly and are separated by several hundred light-years.
- M34 : This open cluster with an apparent brightness of 5.5m lies at a distance of approximately 1,400 ly and consists of about 100 stars that are scattered over an area larger than that of the full moon. Its true diameter is about 14 ly. M 34 can be resolved even with good binoculars but is best viewed using a telescope at low magnifications.
- is also called ''Little Dumbbell Nebula''. It measures about 65 arc seconds and has an apparent brightness of 10.1m.
- , discovered in 1884-85 by the American astronomer Edward E. Barnard , is a great target for astrophotographers. Due to its low Surface Brightness it's a very difficult object when observed visually.
The stars of the constellation Perseus can be connected in an alternative way.
Perseus' body is formed by the stars
Beta Persei ,
Kappa Persei ,
Iota Persei ,
Alpha Persei ,
Sigma Persei ,
Nu Persei , and
Epsilon Persei . Alpha Persei and beta Persei are of the second magnitude, and are also called Mirfak and Algol respectively. Star epsilon Persei is of the third magnitude.
The stars alpha Persei, , and tau Persei form Perseus'
Cap .
The stars alpha Persei,
Psi Persei ,
Delta Persei ,
48 Persei ,
Mu Persei , and
Lambda Persei form Perseus' left
Arm and hand: delta Persei being of the third magnitude.
The stars iota Persei,
Theta Persei , and
Phi Persei form the right arm and hand. Perseus' right hand, phi Persei, is yanking at one of
Andromeda 's feet (51 Andromedae), intent on liberating her. (After liberating her, he marries her.)
Stars epsilon Persei,
Xi Persei ,
Zeta Persei , and
Omicron Persei form Perseus' left
Leg and foot: zeta Persei being of the third magnitude.
Finally, stars beta Persei,
Rho Persei , and
Pi Persei form Perseus' right leg and foot.
- H. A. Rey, ''The Stars — A New Way To See Them''. Enlarged World-Wide Edition. Houghton Mifflin, Boston, 1997. ISBN 0-395-24830-2.
:Stars with proper names:
- (26/β Per) ~2.09 Ghoul'' or '''''Gorgona''''' Prima'' or '''Demon Star''' or '''Ghoul Star''' - eclipsing binary, Algol Variable prototype
- : < رأس الغول ''ra´s al-ghūl'' The demon's (ghoul's) head
- : < ''gorgonea prīma'' The first gorgonean star
- ( 22/π Per ) 4.68 ''
- ( 25/ρ Per ) 3.32 ''
- ( 28/ω Per ) 4.61 ''
- ( υ Per ) ''Nembus''
- or '''Perseus Double Cluster''' or '''Chi/h Persei'''
- : < معصم ''macşam'' wrist
- ''Misam'' ( χ Per , NGC 884 ) – actually an open cluster
- ''Misam'' ( H Per , NGC 869 ) – actually an open cluster
:Stars with Bayer designations:
::
23/γ Per – double 2.91, 3.0 ;
39/δ Per 3.01;
45/ε Per 2.90;
13/θ Per 4.10;
ι Per 4.05 – nearby;
47/λ Per 4.25;
51/μ Per 4.12;
41/ν Per 3.77;
35/σ Per 4.36;
18/τ Per 3.93, 4.0 ; υ Per, see
51 And ;
φ Per 4.01;
37/ψ Per 4.32;
B Per 4.60;
B2 Per 5.55;
48/c Per 3.96;
53/d Per 4.80;
58/e Per 4.25;
52/f Per 4.67;
4/g Per 4.99;
9/i Per 5.16;
K Per 4.77;
32/l Per 4.96;
57/m Per 6.09;
42/n Per 5.14;
40/o Per 4.97;
43/A Per 5.28
:Stars with Flamsteed designations:
::
1 Per 5.53;
2 Per 5.70;
3 Per 5.70;
5 Per 6.38;
6 Per 5.31;
8 Per 5.75;
10 Per 6.25;
11 Per 5.76;
12 Per 4.91;
14 Per 5.43;
16 Per 4.22;
17 Per 4.56;
20 Per 5.34;
21 Per 5.10;
24 Per 4.94;
29 Per 5.16;
30 Per 5.49;
31 Per 5.05;
34 Per 4.67;
36 Per 5.30;
49 Per 6.07;
50 Per 5.52;
54 Per 4.93;
55 Per 5.73;
56 Per 5.77;
59 Per 5.30
