Tau Leo
Observable Double Star
Good (58/100)
Sep: 89.2", Companion: mag 7.5
HIP 55945; Tau Leo; 84 Leo
DoubleStar
Leo
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.95
Spectral Type
G7.5IIIa
Star Color
Orange
(B-V 1.00)
Distance
95.9 ly
Position & Identifiers
RA
11h 27m 56.2s
Dec
+02° 51' 22.0"
Constellation
Leo
HR
4418
HIP
55945
Bayer
Tau
Flamsteed
84 Leo
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Visibility
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Multiple Star System
Components
4
Component IDs
AB
Separation
89.2″
Companion Mag
7.5
Position Angle
181°
Star Colors
A: Orange
Discoverer
STFA 19
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 89.2″ · PA: 181° · 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
Sirius group; UMa stream.
Survey Image
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