Delta Sge
HIP 97365; Delta Sge; 7 Sge
DoubleStar
Sge
Visible
Level 6
Professional/Research - Requires steady seeing
Physical Properties
Magnitude
3.82
Spectral Type
M2II + B0V
Star Color
Red
(B-V 1.41)
Distance
582.1 ly
Position & Identifiers
RA
19h 47m 23.3s
Dec
+18° 32' 03.0"
Constellation
Sge
HR
7536
HIP
97365
Bayer
Delta
Flamsteed
7 Sge
Variable ID
Del Sge
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Visibility
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Multiple Star System
Separation
0.1″
Companion Mag
5.0
Companion Sp
B0V
Position Angle
242°
Star Colors
A: Red
B: Blue
Discoverer
BLA 6
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.1″ · PA: 242° · N up, E left
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
Amp. 0.09p.
Suspected visual double probably single image, composite spectrum. Secondary either B6 or A0V.
3725d, K 7.5k/s, V0 +1.9k/s, asini 364, vsini of both components =<50k/s.
In reflection nebula; Gamma Cas-type nebula. Assoc. of Delta Sge with nebula probable but not certain; nebula | could be HII region excited by O8f star, 9 Sge, HR 7574.
Survey Image
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