Theta Gem
Observable Variable Star
Good (46/100)
Range: 3.2 - 3.9, Period: 233.0d
HIP 33018; Theta Gem; 34 Gem
VariableStar
Gem
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
3.60
Range
3.2 - 3.9
Period
233.000 days
Spectral Type
A2IV
Star Color
White
(B-V 0.10)
Distance
189.0 ly
Position & Identifiers
RA
06h 52m 47.3s
Dec
+33° 57' 40.0"
Constellation
Gem
HR
2540
HIP
33018
Bayer
Theta
Flamsteed
34 Gem
Double Cat
5532
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Visibility
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Comparison Stars for Theta Gem
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Components
3
Component IDs
AB
Separation
80.8″
Companion Mag
12.6
Position Angle
324°
Star Colors
A: White
Discoverer
FOX 150
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 80.8″ · PA: 324° · 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.
Survey Image
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