Sigma Serpentis — Double Star in Serpens
Observe
1Physical Properties
Magnitude
4.82
Spectral Type
F0V
Star Color
Yellow-white
(B-V 0.34)
Distance
76 ly
2Position & Identifiers
RA
16h 22m 04.4s
Dec
+01° 01' 45.0"
Constellation
Serpens
(Ser)
HR
6093
HIP
80179
HD
147449
SAO
121540
Bayer
Sigma
Flamsteed
50 Ser
Querying VizieR catalog...
3How easy to split?
Primary
4.8 mag
Companion
11.9 mag
Separation
43.0″
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Hard | V. hard+ | V. hard |
| 150 mm Newton 150mm Newt. | Medium | Hard+ | Hard |
| Celestron C8 (203 mm SCT) C8 203mm | Medium+ | Medium | Hard+ |
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
Apr – Jun
(peak: May)
5Multiple Star System
Separation
43.0″
Companion Mag
11.9
Companion Sp
M2V
Position Angle
132°
Star Colors
A: Yellow-white
B: Red
Discoverer
LUH 11
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 4.8 · B: 11.9 · Sep: 43.0″ · PA: 132° · N up, E right
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
Explore
6
Size Comparison
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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
Hyades group.
15
Light Travel Time Machine
16
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.
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