Uranus Spectrum

16th October 2004

Magnitude: 5.8 Phase: 1.000 Phase angle: 2.2 Elongation: 129.4
Diameter: 3.61"
Light time: 2h 41m 24.4s
Right ascension: 22h 21m 30.24s Declination: -11 5' 12.6"
Constellation: Aquarius

200mm F5 newtonian @F5 , SC1.5 toucam RAW mode. IRB filter. 100 lines/mm grating
80mm F5 refractor @ F10 guidescope with SC1 toucam and GuideDog

The planet Uranus is presents a very small disk to our telescopes. Over 10 times smaller than Jupiter, its not really a good target for a fast Newtonian. However, I decided that investigating its blue green colour with my grating would give an interesting result. Uranus was low in the sky when taking this spectrum - see here

200x2s frames debayered and stacked in a testing copy of Registax v3. Processed according to my vspec tutorial.

The strong absorbtion in the red due to the methane in Uranus' atmosphere is clearly visible. Many other unidentified lines are also visible.

Location: Curdridge, Southampton, UK. 51N 15W.
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