MARCH 2020/11/09

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Comparison of my image of the planet Mars with the image presented in the SkySafari planetarium at the same time
Annotated photo of my image showing the name of the main surface details of the planet

Observation place
My permanent observatory in Longueuil
in white light pollution zone


TelescopeCelestron EdgeHD 800 Schmidt-Cassegrain - Diameter 203mm (8 ''), focal length 2032mm, f / 10
Barlow 2X (f / 20)
MountCelestron CGEM
Imaging cameraZWO UPS 120MM (monochrome)
Selected resolution640 480 pixels x
Image typeR (RVsB)
Vs for synthetic green
The red image was chosen as the luminance image
ExhibitionRed filter:  
    19,7 ms  
    43 images per second on average
Blue filter:  
    45,39 ms  
    19 images per second on average
Number of images Selection of the best 1 photos out of the 250 taken for each of the red and blue videos
Image acquisition softwareFireCapture
TreatmentPIPP, AutoStakker, PixInsight and Photoshop
Specific treatmentCreate a synthetic green layer

Object description

Object typePlanet
Visual magnitude-1,9
Diameter 6 792 km
Dimension seen from Earth18,6 arc seconds
Distance Mars - Earth when shooting0,504376 AU (75,5 million km)  
The planet Mars is the fourth planet in ascending order of distance from the Sun. Its distance from the Sun is between 206,6 to 249,2 million kilometers, with an orbital period of 669,58 Martian days (686,71 Earth days). It is a terrestrial planet (rock formations and not gas), as are Mercury, Venus and Earth. It is about ten times less massive than the Earth, but ten times more massive than the Moon. Its topography presents analogies as well with the Moon, through its craters and its impact basins, as with the Earth, with formations of tectonic and climatic origin such as volcanoes, rifts, valleys, fields. dunes and polar ice caps. The highest volcano in the Solar System, Olympus Mons (which is a shield volcano), and the largest canyon, Valles Marineris (which is visible in my image at the top), are found on Mars. It has a thin atmosphere which is mainly composed of carbon dioxide (CO2).

NASA plans to send humans to Mars by 2030. These pioneers would lay the groundwork of a great Martian city which could accommodate up to a million people before the end of the XNUMXst century! Let's say that right now, it's a project!

Currently, Mars is in opposition to Earth, which means it is closest to Earth. Its maximum opposition period (closest to Earth) was last October 13th, so close to my image which was taken on November 9th. The recommended period for photographing the planet is up to two months before or after its period of maximum opposition. The distance of Mars from Earth when the picture was taken was 75,5 million km. Its magnitude of -1,9 and its apparent diameter (as seen from Earth) was 18,6 '' of arc. To photograph the planet, you have to choose a night when the atmospheric agitation (turbulence) is good to very good, which was the case from midnight, the start of the shooting started at 00:38.  

By carrying out a collimation of my telescope just before the shot and taking advantage of good air turbulence (4/5), I succeeded in fetching very beautiful details of the planet's surface. This is my best image so far in March.
Richard Beauregard
Sky Astro - CCD
My impression "We cannot be alone in this gigantic universe"