Iota Leo
Observable Double Star
Good (55/100)
Sep: 2.3", Companion: mag 6.7
HIP 55642; Iota Leo; 78 Leo
DoubleStar
Leo
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
3.94
Variable Type
Delta Scuti (Pulsating)
Spectral Type
F3V
Star Color
Yellow-white
(B-V 0.41)
Distance
77.2 ly
Position & Identifiers
RA
11h 23m 55.5s
Dec
+10° 31' 45.0"
Constellation
Leo
HR
4399
HIP
55642
Bayer
Iota
Flamsteed
78 Leo
Double Cat
8148
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Visibility
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Multiple Star System
Separation
2.3″
Companion Mag
6.7
Position Angle
89°
Star Colors
A: Yellow-white
B: Orange
Discoverer
STF1536
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 2.3″ · PA: 89° · 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
Delta Sct?
4.03 F2IV, 6.70 G3V, 192.0y, a = 1.92"; possible subsystem with period about 16y. Combined mag., colors. Combined | mass about 3 Suns.
192y, K 2.5k/s, V0 -11.0k/s, asini 2030. Orbit questioned by Morbey and Griffin (1987, ApJ, 317, 343).
UMa stream.
0.052".
Survey Image
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