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Propeller Nebula with double tube, 


            Luigi Fontana
Propeller Nebula with double tube

Propeller Nebula with double tube

Technical card

Imaging telescopes or lenses:TecnoSky APO Triplet 130/900Orion ODK 12"

Imaging cameras:SBIG STL-11000Canon EOS 450D Baader mod

Mount:10Micron GM2000 QCI

Guiding telescope or lens:Vixen 60/700

Guiding camera:Lodestar


Filter:Baader Planetarium H-Alpha Filter

Resolution: 3832x2536

Dates:July 1, 2016

Frames:Baader Planetarium H-Alpha Filter: 31x600" ISO800 -25C bin 1x1

Integration: 5.2 hours

Darks: ~31

Flats: ~13

Flat darks: ~13

Bias: ~13

Avg. Moon age: 26.25 days

Avg. Moon phase: 11.70%

Bortle Dark-Sky Scale: 3.00

Mean SQM: 21.30

Temperature: 12.00 job: 1338683

RA center: 304.008 degrees

DEC center: 43.783 degrees

Pixel scale: 0.917 arcsec/pixel

Orientation: 91.265 degrees

Field radius: 0.585 degrees

Locations: Capanne di Cosola e postazioni limitrofe, Capanne di Cosola, Appennino, al confine tra Piemonte, Emilia e Liguria, None


I used a "double tube" setup to collect Halfa and color at the same time during a two-nights weekend on the Appennini (1300 m a.s.l., average SQM 21,3, Bortle 3). This is what I was able to do. Sbig 11000 w/ H-alfa on the ODK 12", Canon 450 Baader on the APO 130. 31x600s frames for H-alfa, 44x600s frames for color. Obviously the three images are H-alfa only, color only, and composite. You can see the setup I used here.
If you are curious, it takes about 2:20h-2:30h from "car engine stop" when I park to the first useful frame. "D" version was created by with Photoshop, while "E" Version was made by Edoardo Radice using PixInsight.

Ho usato un setup a "doppio tubo" per riprendere contemporaneamente H-alfa e colori durante una due notti a Capanne di Cosola (1300 mslm, SQM medio 21,3, Bortle 3). Questo è quanto sono stato capace di fare da solo... SBIG 11000 con filtro Halfa sull'ODK da 30 cm (31 frame da 600s) e Canon 450 Baader sull'APO 130 (44x600s). Ovviamente le tre immagini sono solo Halfa, solo colore, e composita. Potete vedere qui il setup che ho usato
Dato che me lo chiedono vogliono 2:20h-2:30h da quando spengo l'auto all'arrivo a quando apro il primo otturatore "utile". ^_^
La versione "D" è stata elaborata da me con Photoshop, mentre la "E" è stata elaborata da Edoardo Radice con PixInsight.



Luigi Fontana
License: Attribution-NonCommercial-ShareAlike Creative Commons


  • Propeller Nebula with double tube, 


            Luigi Fontana
  • Propeller Nebula with double tube, 


            Luigi Fontana
  • Propeller Nebula with double tube, 


            Luigi Fontana
  • Final
    Propeller Nebula with double tube, 


            Luigi Fontana

Sky plot

Sky plot


Propeller Nebula with double tube, 


            Luigi Fontana