Nu Gem
Observable Double Star
Good (48/100)
Sep: 112.8", Companion: mag 8.0
HIP 30883; Nu Gem; 18 Gem
DoubleStar
Gem
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.15
Spectral Type
B6IIIe
Star Color
Blue-white
(B-V -0.13)
Distance
362.4 ly
Position & Identifiers
RA
06h 28m 57.8s
Dec
+20° 12' 44.0"
Constellation
Gem
HR
2343
HIP
30883
Bayer
Nu
Flamsteed
18 Gem
Double Cat
5103
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Visibility
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Multiple Star System
Components
8
Component IDs
AA'
Separation
112.8″
Companion Mag
8.0
Position Angle
330°
Star Colors
A: Blue-white
B: Blue-white
Discoverer
STTA 77
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 112.8″ · PA: 330° · 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
AA' probably combined light and color. This may be the SB pair, 4.3, 6.0v, sep. 0.2". B, 8.5V A1V at 113", | vsini 141k/s, is binary with C, 8.9v, sep. 0.2". Component P, 15.1V at 24" optical. Other components faint at 54" | to 92".
ADS 5103A, 9.6y. Resolved by speckle interferometry 1983.93, sep. 0.07".
Hyades group.
Shell star.
Survey Image
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