Mars just past opposition

[The Thing]

Can't believe my old scope got this much detail. I have cleaned the optics, rotated the mirror on its mount as it had some markings I hadn't noticed before, collimated, reduced the focal ratio from f30ish to f18 as recommended by AstroSurfaces calculator. The results are worth it.


Image date, time and location    2020-10-21-2235 UTC,Manche, France
Telescope aperture and focal ratio LX90 8" UHTC 2xED Barlow ADC f18
Camera and filters used            ZWO ASI294MC Pro, no filters
Processing applied                    AstroSurface NOVA  2020-09-12       http://astrosurface.com



Mars just past opposition
FireCapture v2.7 01 BETA Settings
------------------------------------
Observer=Duncan Evenden
Location=Manche, France
Scope=LX90 8" UHTC 2xED Barlow ADC
Camera=ZWO ASI294MC Pro
Filter=OSC
Profile=Mars
Diameter=21.57"
Magnitude=-2.45
CM=81.0° (during mid of capture)
FocalLength=3900mm (F/19)
Resolution=0.25"
Filename=2020-10-21-2235_7-DAE-OSC-Mars.ser
Date=211020
Start=223521.301
Mid=223542.005
End=223602.709
Start(UT)=223521.301
Mid(UT)=223542.005
End(UT)=223602.709
Duration=41.408s
Date_format=ddMMyy
Time_format=HHmmss
LT=UT +2h
Frames captured=5000
File type=SER
Binning=1x1
Bit depth=8bit
Debayer=yes
DebayerAlgorithm=HQLinear
BayerPattern=RG
ROI=200x200
ROI(Offset)=2008x1272
FPS (avg.)=120
Shutter=8.000ms
Gain=210 (36%)
AntiDew=on
AutoExposure=off
AutoGain=off
AutoHisto=75
Brightness=4
FPS=100 (off)
Fan=on
Gamma=50 (off)
HardwareBin=off
HighSpeed=off
SoftwareGain=10 (off)
TargetTemp=-5
USBTraffic=80
WBlue=99
WGreenOffset=0 (off)
WRed=45
Histogramm(min)=0
Histogramm(max)=0
Histogramm=0%
Noise(avg.deviation)=n/a
Limit=5000 Frames
Sensor temperature=-4.9°C

[Roberto]

Great result!  I like AstroSurface a lot.

We've had nothing but clouds and poor seeing here.  I was hoping tonight was going to be good but the forecast is deteriorating already...

Roberto

[Mac]

very nice,

just itching to get all set up down here...

Mac.

[The Thing]

Thanks Roberto and Mac.

If anyone can explain the green patch without mentioning martians and canals... If I try to adjust it out all the other colour goes screwy. I don't know it's a low area. Maybe mist?

[Roberto]

It's clouds.  Your colour balance maybe off. They appear white-blue on most images.  I have seen them through the eyepiece in my 10" Mak.   This apparition they are quite prominent and move a lot; particularly over the north pole. 

See this picture taken by a guy in Florida with a 16" newtonian and exceptional seeing.

Roberto