Tau Aqr
HIP 112542; Tau1 Aqr; 69 Aqr
HIP 112542; Tau1 Aqr; 69 Aqr
DoubleStar
Aqr
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
5.66
Spectral Type
A0V
Star Color
Blue-white
(B-V -0.05)
Position & Identifiers
RA
22h 47m 42.8s
Dec
-14° 03' 23.0"
Constellation
Aqr
HR
8673
HIP
112542
Bayer
Tau1
Flamsteed
69 Aqr
Double Cat
16268
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
21.0″
Companion Mag
9.6
Companion Sp
A9
Position Angle
127°
Star Colors
A: Blue-white
B: Yellow-white
Discoverer
STF2943
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 21.0″ · PA: 127° · 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
AB optical.
Sometimes called Tau1 Aqr; usually no Greek letter. See HR 8679.
Survey Image
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