44 Leonis — Double Star in Leo
Observe
1Physical Properties
Magnitude
5.61
Variable Type
Semi-Regular Variable
Spectral Type
M3IIIabs
bright giant
Star Color
Red
(B-V 1.62)
3How easy to split?
Primary
5.6 mag
Companion
9.1 mag
Separation
3.6″
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Hard | Hard | Hard |
| 150 mm Newton 150mm Newt. | Medium+ | Medium+ | Medium+ |
| Celestron C8 (203 mm SCT) C8 203mm | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
Best season
Jan – Mar
(peak: Feb)
5Multiple Star System
Separation
3.6″
Companion Mag
9.1
Star Colors
A: Red
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 5.6 · B: 9.1 · Sep: 3.6″ · PA: ? · N up, E right
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
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6
Size Comparison
Querying VizieR for stellar data…
7
Compare Stars
8
Spectral Classification
9
Hertzsprung-Russell Diagram
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10
Stellar Lifecycle
11
Blackbody Spectrum
12
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
13
Stellar Fusion
Discover
14Stellar Notes
SRb? 5.60 - 5.67V, 1 - 2d?
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
49 Leo
Tight double — a rewarding split at 2.1″
Double Star
mag 5.67
2.4°
Leo
NGC 3332
Elliptical galaxy
Galaxy
mag 13.0
3.8°
Leo
Regulus
HIP 49669; Alpha Leonis; 32 Leonis
Bright naked-eye star, mag 1.4
Double Star
mag 1.35
5.2°
Leo
56 Leo
Semi-regular variable, range 5.7–6.0
Variable Star
mag 5.81
8.1°
Leo
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