23 UMa
HIP 46733; 23 UMa
DoubleStar
UMa
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
3.67
Variable Type
Delta Scuti (Pulsating)
Spectral Type
F0V
Star Color
Yellow-white
(B-V 0.33)
Distance
80 ly
Position & Identifiers
RA
09h 31m 31.7s
Dec
+63° 03' 43.0"
Constellation
UMa
HR
3757
HIP
46733
Flamsteed
23 UMa
Double Cat
7402
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
22.7″
Companion Mag
9.2
Companion Sp
K5V
Position Angle
267°
Star Colors
A: Yellow-white
B: Red
Discoverer
STF1351
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 22.7″ · PA: 267° · 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
Delta Sct, amp. 0.07B, about 2 hrs.
AB binary. C, 10.5v at 100", optical.
Sirius group?
0.038".
Survey Image
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