54 Leo
Observable Double Star
Excellent (60/100)
Sep: 6.9", Companion: mag 6.3
HIP 53417; 54 Leo
DoubleStar
Leo
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.50
Spectral Type
A1V
Star Color
White
(B-V 0.01)
Distance
217.4 ly
Position & Identifiers
RA
10h 55m 36.8s
Dec
+24° 44' 59.0"
Constellation
Leo
HR
4259
HIP
53417
Flamsteed
54 Leo
Double Cat
7979
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Visibility
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Multiple Star System
Separation
6.9″
Companion Mag
6.3
Companion Sp
A2Vn
Position Angle
111°
Star Colors
A: White
B: White
Discoverer
STF1487
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 6.9″ · PA: 111° · 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
Binary with HR 4260. Colors for combined light. Blended mag. 4.32V.
Survey Image
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