Psi Sgr
HIP 94643; Psi Sgr; 42 Sgr
DoubleStar
Sgr
Visible
Level 6
Professional/Research - Requires steady seeing
Physical Properties
Magnitude
4.85
Spectral Type
G8:III+A8V
Star Color
Yellow
(B-V 0.56)
Distance
652.3 ly
Position & Identifiers
RA
19h 15m 32.4s
Dec
-25° 15' 24.0"
Constellation
Sgr
HR
7292
HIP
94643
Bayer
Psi
Flamsteed
42 Sgr
Double Cat
12214
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
0.2″
Companion Mag
5.7
Companion Sp
G8III
Position Angle
106°
Star Colors
A: Yellow
B: Orange
Discoverer
B 430
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.2″ · PA: 106° · 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
5.5 F8V, 5.7 F9V, 18.75y, a = 0.153". Component A is SB, 6.2, 6.2v, sep. 0.001".
ADS 12214B, SB2O 10.7786d, K 72.5k/s, V0 -43.0k/s, asini 9.48. Masses 2.1 and 1.7 solar. ADS 12214AB, 7319.0d, K | 10.0k/s, V0 -26.8k/s, msin3i 3.78, asini 866. A, 2.7 solar mass.
Probably not IR source.
AB variously classified as F2:+F7III, F8V+F9V, F6V+F7V, A8V+G8:III.
0.010".
Survey Image
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