Lambda Columbae — Double Star in Columba
Observe
1Physical Properties
Magnitude
4.87
Range
4.87 - 4.90
Period
30.9 hours
Variable Type
Ellipsoidal Variable
Spectral Type
B5V
Star Color
Blue
(B-V -0.15)
Distance
93 ly
2Position & Identifiers
RA
05h 53m 06.9s
Dec
-33° 48' 05.0"
Constellation
Columba
(Col)
HR
2056
HIP
27810
HD
39764
SAO
196276
Bayer
Lambda
Variable ID
Lam Col
Querying VizieR catalog...
3How easy to split?
Primary
4.9 mag
Companion
10.5 mag
Separation
1.0″
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | V. hard | V. hard | V. hard |
| 150 mm Newton 150mm Newt. | V. hard | V. hard | V. hard |
| Celestron C8 (203 mm SCT) C8 203mm | V. hard | V. hard | V. hard |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
To reach "Medium" at Bortle 3, you'd need at least a 960 mm reflector.
4Visibility
Set a location in User Settings to see visibility data.
Best season
Nov – Jan
(peak: Dec)
5Light Curve
6Multiple Star System
Separation
1.0″
Companion Mag
10.5
Position Angle
198°
Star Colors
A: Blue
Discoverer
OUD 2
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 4.9 · B: 10.5 · Sep: 1.0″ · PA: 198° · N up, E right
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
Explore
7
Size Comparison
Querying VizieR for stellar data…
8
Compare Stars
9
Spectral Classification
10
Hertzsprung-Russell Diagram
Loading HR diagram…
11
Stellar Lifecycle
12
Blackbody Spectrum
13
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
14
Stellar Fusion
Discover
15Stellar Notes
Ell? 4.85 - 4.92V, 0.03b, 0.640d.
16
Light Travel Time Machine
17
Relativistic Travel
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.
NGC 2090
Bright spiral galaxy
Galaxy
mag 12.0
1.3°
Columba
HIP 30840
Tight double — a rewarding split at 1.2″
Double Star
mag 5.74
7.6°
Canis Major
NGC 2243
Open cluster
Open Cluster
mag 9.4
8.1°
Canis Major
HIP 31190
Easy double, sep 24.7″
Double Star
mag 5.69
8.5°
Canis Major
C73
NGC 1851
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 7.3
10.0°
Columba
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