Matar
Eta Peg
Observable Double Star
Good (52/100)
Sep: 90.4", Companion: mag 6.9
HIP 112158; Eta Peg; 44 Peg
DoubleStar
Peg
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
2.94
Spectral Type
G2. II-III SB
Star Color
Orange
(B-V 0.86)
Distance
213.7 ly
Position & Identifiers
RA
22h 43m 00.1s
Dec
+30° 13' 17.0"
Constellation
Peg
HR
8650
HIP
112158
Bayer
Eta
Flamsteed
44 Peg
Double Cat
16211
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Visibility
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Multiple Star System
Components
6
Component IDs
AxBC
Separation
90.4″
Companion Mag
6.9
Companion Sp
G5
Position Angle
28°
Star Colors
A: Orange
B: Orange
Discoverer
BLA 11
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 90.4″ · PA: 28° · 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 Notes
ADS 16211A.
A* 2.94 G2II-III, 2.23y, a = 0.022". Speckle interferometry measures range from unresolved to sep. 0.059". BC, 10.0, | 10.0v sep. 0.2" at 90" from A, physical.
ADS 16211A, 818.0d, K 14.2k/s, V0 +4.3k/s, asini 158, vsini of G8 component 9k/s, F0 component =<50k/s.
Matar.
Survey Image
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