9th July
Barnard's StarThis star has the record for 'proper motion', ie the speed with which it appears to move across the sky background.
The speed is 10.3 arcseconds per year.
This animation shows the star in 2013 (July 5th) and 2014 (July 9th).
Colour image.
20x30 second in luminance, binned 1x1
RGB each 5x30 seconds, binned 2x2
Astrometry
I used Pinpoint to get coordinates for the star for each image (20 images for 2014, 19 images for 2013).
The average position was found for each date.
2013 RA = 17 57 47.773 Dec = 4 43 56.400
2014 RA = 17 57 47.721 Dec = 4 44 6.885
I used a spreadsheet I made some years ago to find the angular separation between these two positions.
Answer 10.50 arc seconds
This is for an interval of 369 days, so for 1 year the movement is 10.386 arc seconds.
July 21st
Cocoon nebula IC5146
10 x 10 minutes in Ha
July 23rd
12 x 10 minutes in luminance captured. This is a bicolour image.
Ha to red channel, Lum to blue. Green channel synthesised.
25th July
M16 Eagle nebula
9x10 minutes in Ha.
M16 is very low in the sky from my location. Light pollution is so bad that no stars at all can be seen in that area with the naked eye.
However, the Ha filter manages to cut through.
Cropped and rotated to give the 'Pillars of Creation' view.
While waiting for the summer sky to darken I took a quick RGB of Albireo.
The different colours show up nicely.
(10 x10 seconds, each filter).
July 28th
I managed to get 6 x 10minutes of SIII data, enough for a bicolour image:
July 30th
Captured 9 x 10 minutes in OIII
Processed according to Hubble palette
Rather noisy in places due to lack of sufficient data, but the overall appearance and colour seems about right.
Central area cropped and rotated
