Gamma Lyrae (γ Lyr)
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Traditional Name
Sulafat
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Spectral Classification
B9III (blue-white giant)
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Right ascension
18h 58m 56.62241s
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Declination
+32° 41' 22.4003"
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Apparent magnitude
3.261 V
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Mass
5 M
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Radius
15 R
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Luminosity
2,100 L
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Temperature
10,080 K
Beta Lyrae (β Lyr)
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Traditional Name
Sheliak
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Spectral Classification
B6-8II (blue-white bright giant)
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Right ascension
18h 50m 04.79525s
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Declination
+33° 21' 45.6100"
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Apparent magnitude
3.52 V
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β Lyr A / β Lyr B
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Mass
13.16 ± 0.3 M /
2.97 ± 0.2 M
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Radius
6.0 ± 0.2 R /
15.2 ± 0.2 R
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Luminosity
26,300 L /
6,500 L
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Temperature
30,000 ± 2,000 K /
13,300 K
Delta2 Lyrae (δ2 Lyr)
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Spectral Classification
M4II (red bright giant)
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Right ascension
18h 54m 30.2838s
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Declination
36° 53' 55.007"
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Apparent magnitude
4.30 V
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Mass
7.3 M
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Radius
338 ± 43 R
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Luminosity
18,000 ± 5,100 L
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Temperature
3,600 ± 50 K
Zeta1 Lyrae (ζ1 Lyr)
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Spectral Classification
B9III (blue-white giant)
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Right ascension
18h 44m 46.35735s
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Declination
+37° 36' 18.4171"
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Apparent magnitude
4.36 V
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Mass
2.2 M
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Radius
2.8 R
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Luminosity
3,100 L
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Temperature
8,000 K
Alpha Lyrae (α Lyr)
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Traditional Name
Vega
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Spectral Classification
A0V (blue-white dwarf)
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Right ascension
18h 36m 56.33635s
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Declination
+38° 47' 01.2802"
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Apparent magnitude
0.03 V
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Mass
2.135 ± 0.074 M
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Radius
2.362 x 2.818 R
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Luminosity
40.12 ± 0.45 L
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Temperature
9,602 ± 180 K
Epsilon Lyrae (ε Lyr) [binary "double double"]
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Epsilon1 Lyrae / Epsilon2 Lyrae
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Spectral Classification
F1V (yellow-white dwarf) /
A8V (white dwarf)
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Right ascension
18h 44m 20.3453s /
18h 44m 22.7803s
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Declination
+39° 40' 12.444" /
+39° 36' 45.798"
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Apparent magnitude
4.7 V /
5.1 V
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Mass
1.9 M /
1.9 M
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Radius
2 R /
2 R
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Luminosity
18,000 L /
17,000 L
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Temperature
7,800 K /
8,000 K