ART ASTRONOMY Uranus
2023 on Sun, Moon, Venus & Miscellaneous PROCESSING
TUTES |
MARS 2016 |
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Note: Some
of the images on this page are "clickable" and will open up as
"full scale images" in a new tab. |
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15th
September 2016 |
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6th
September 2016 |
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22nd
August 2016 |
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16th
August 2016 |
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13th
August |
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2nd
August 2016 |
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By now Mars has shrunk very noticeably…being only
2/3 the diameter it was at opposition. (when it was closest, brightest &
largest appearance) In this image you can also see that Mars is becoming
much more gibbous, (ie, the phase of Mars shows a much less than full disk,
similar to the Moon when it is between First Quarter – the Half Moon - &
when it is a Full Moon) This is also the time of year when Mars exhibits
dust storms: the “dirty” border on the clouds on the lower left side of this
image is a dust storm as opposed to the clouds themselves. |
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16th
July 2016 |
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14th
July 2016 |
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Mars shrinking & taking on a more gibbous
appearance: in this image we see a swirrling “gap” in the North Polar clouds
made up of dust & ice crystals… |
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2nd
July 2016 |
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2nd
June 2016 |
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Much closer to opposition in this image, Mars is
displaying a much fuller disk.Syrtis Major, the dark Martian feature
reminiscent of India in shape is
prominent at the near-centre of the view. |
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31st
May 2016 |
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17th
& 18th May 2016 |
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The image
below was rather pleasing for us to achieve: it is an image of Mars showing
its’ 2 tiny moons, Phobos & Deimos. These moons are 14 & 15.1
magnitudes respectively in brightness (way below human vision detection)
& are very hard to pick up in images at any time. In this
instance we increased the gain, effectively over-exposing the planet Mars
itself: what surprised us at the time was the fact that we could still
recover much of the surface detail (the darker areas on the disk) despite the
highly over-exposed camera settings. This is real detail, albeit somewhat
blurred due to the very high exposure, & the 2 tiny moons were present in
the same capture data, themselves brought out in processing by raising the
levels in the background sky. The reason
the text states “No compositing” is because you wll most often find amateur
images of Mars & these moons - & even these are rare anyway tbh -
where Mars shows its’ details as in a normal image, but the moons are
captured in a completely different capture & settings…but in this case
all that you can see was brought out in processing from a single capture – a
rather rare feat! J |
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4th
May 2016 |
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25th
April 2016 |
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2
images (above & below) taken on consecutive nights where some of the
features are seen in both images: the “club-like” feature seen in both these
images is known as Sinus Meridiani. |
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24th
April 2016 |
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Here, in this image taken in poor seeing conditions,
we see swirling clouds covering the Hellas Basin region mentioned in the next
image down. Other areas of Mars are also covered in clouds… |
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5th
April 2016 |
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4th
April 2016 |
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25th
Mar 2016 |
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In
the image below we can see the view where Syrtis Major is on show – this
prominent dark landmark/feature looks a bit like India or Africa (except
upside-down) & below it at the bottom of the image is the South Pole of
Mars. This
polar area as well as the region below Syrtis Major is covered with thick
cloud & haze & incorporates the Hellas Basin – an absolutely enormous
impact crater many miles deep on Mars…the largest/deepest crater in the
entire Solar System! Due to its position & geographical nature the
Hellas Basin is often swathed in cloud cover… |
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15 Mar 2016 |
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The image below is the same one as in the next image
below this one - except it is shown at a larger scale to help show the
details obtained… Here Mars displays a “gibbous phase” – like our
Moon, this planet goes through phases, although never becoming much less-full
in appearance than the image here – unlike our Moon which can appear as a
very slender crescent!. |
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Just over a month later than the image of Feb. 4th
Mars, had “grown” from about 7 arc-seconds in size to 10 arcseconds. (written
as 10”) This “growing” in size is because Mars is getting
nearer to Earth but it is of course still tiny to the unaided human eye…as a
comparison the Full Moon appears as 30 arc-minutes (30’) or 1800” to our naked eyes – meaning about 180X the
size of Mars in this image in comparison… The image below also displays how each of the
individual channels in an RGB or colour image appear…it is these combined
channels that create the actual colour image. |
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4th
Feb 2016 |
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Our Mars imaging outcome with the Red Planet still very small in size & a long way from opposition. (when it is nearest, biggest & brightest - & in the best position to image!) Not as good an outcome as the first session’s image this year below, but showing a different face, or topographical features, on the Martian globe. J |
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12th Jan 2016 |
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Our first Mars’ image for the 2016 apparition – Mars only comes around & presents itself favourably once every 2 years - & this is one of those occasions! J Even though this is very early & Mars is still tiny in appearance, we managed to pick up cloud cover on Olympus Mons & both the North & South Polar features. (see earlier Mars webpages for additional information on Mars features etc…) |
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