Asteroid 70850 Schur in Aries
with 10" f/3.9 Astrograph
Uploaded 10/26/17

            
 

            

Asteroid 
70850 Schur



 
We
            finally had the opportunity to attempt to image our asteroid
            this month after a year of waiting for it to become favorably
            placed in the evening sky. Surprisingly, the 10 inch will go
            to magnitude 19 or so in a 2 hour exposure with the ST10xme CCD
            camera. A few faint galaxies appear also in this image, along
            with several other unamed asteroids of similar brightness. Thanks
            Rik!

            
Full frame shot with the field objects
labeled.  I also put the asteriods magnitudes
with each one.

Select an image size for a larger view:

1600 x 1200




            
Here is the chart image from Cartes
du Ciel charting program showing the exact
location of all asteroids in the field at both the
start and ending time for our exposure. They
travel from left to right in 2 hours.

Select an image size for a larger view:

1290 x 960




            
Here I ve overlain a negative image of the map above
and registered it to the star pattern.  You can see that
the asteroid tracks line up perfectly allowing us to
clearly identify all objects in the field.

Select an image size for a larger view:

1600 x 1200




            
Unlabeled full field shot,
about half a degree width.

Select an image size for a larger view:

1600 x 1200


Instrument:  10" f/3.9 Orion Astrograph Newtonian with Baader MPCC
Mount:  Astrophysics 1200 QMD
CCD Camera:  SBIG 10XME NABG with Enhanced Water Cooling
Guider: Meade DSI Pro  w/80mm piggyback refractor
Exposure:  2 hours LRGB
AstroDon RGB Combine Ratio:  1: 1.05: 1.2
Location:  Payson, Arizona, Elevation:  5150 ft.
Sky:  Seeing FWHM = 3 arcsec , Transparency 7/10
Outside Temperature:  55 F
CCD Temperature:  -20 C
Image Processing Tools: 
Maxim DL6:  Calibration, deblooming (Starizona Debloomer), aligning, stacking
PixInsight:  Curves, Deconvolution
Photoshop CS2:  Curves, Color Correction, Gradient removal (Grad Xterminator), Cleanup

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