57 Peg
HIP 114347; 57 Peg
DoubleStar
Peg
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
5.12
Range
4.95 - 5.23
Period
93 days
Variable Type
Semi-Regular Variable (Late-type Giant)
Spectral Type
M4IIIS+A2V
Star Color
Red
(B-V 1.47)
Distance
466 ly
Position & Identifiers
RA
23h 09m 31.5s
Dec
+08° 40' 38.0"
Constellation
Peg
HR
8815
HIP
114347
Flamsteed
57 Peg
Variable ID
GZ Peg
Double Cat
16550
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Visibility
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Light Curve
Multiple Star System B: optical
Separation
32.6″
Companion Mag
10.1
Companion Sp
A2
Position Angle
198°
Star Colors
A: Red
B: White
Discoverer
STF2982
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 32.6″ · PA: 198° · N up, E left
Resolved · 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 Fusion
Stellar Notes
ADS 16550A, Lb? 5.0 - 5.16V.
ADS 16550A companion 8v A3V unresolved by speckle interferometry. Primary over 5 solar masses; companion 2 solar | masses; orbital period over 0.4yrs. vsini of M4 component =<50k/s, A2 component =<90:k/s.
Survey Image
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