Constellation CloseUp: Gemini

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Constellation Close-Up Gemini
James Appleton
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Discussion Topics

• Introduction to Gemini
• Overview of main features
• Castor Pollux
• Double Stars
• M35
• NGC2392
• Small Telescopes Observing Night

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Introduction to Gemini
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Gemini Stars to mag 6.0
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Overview of Main Features
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Gemini Stars to mag 8.0
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Gemini 2 min Exposure
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Gemini 10 min Exposure
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Gemini 10 min Exposure
Castor
Pollux
NGC2266
M35/NGC2158
NGC2129
NGC2420
NGC2392
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Gemini 10 min Exposure
Castor
NGC2371/72
Pollux
NGC2266
M35/NGC2158
NGC2129
NGC2420
IC443
NGC2174/75
NGC2392
Sh2-261
NGC2264
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Castor Pollux
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Castor Pollux
Castor
Pollux
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Components of Castor
Combined magnitude of all components is 1.6
Castor A Magnitude 1.9
Castor B Magnitude 2.9
B
A
Period 400 years Orbital diameter 13.5b km
C
Period 10,000 years Orbital diameter 160b km
Castor C Magnitude 9.1
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Components of Castor
Castor A Magnitude 1.9
Castor B Magnitude 2.9
A
B
Period 10,000 years Orbital diam 160b km
Period 400 years Orbital diam 13.5b km
C
Castor C Magnitude 9.1
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Double Multiple Stars
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Gemini Double Multiple Stars
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Double Multiple Stars
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M35 NGC2158
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M35 1 min Exposure
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M35 Amateur Image
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M35 Professional Image
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NGC2392 -The Eskimo or Clown Face Nebula
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NGC2392 Amateur Image
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NGC2392 Mount Palomar Image
Photograph in red light
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NGC2392 Hubble Image
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NGC2392 Hubble Image
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Small Telescopes Observing NightMon 16
February, 8.00pm