Comets, space stations, and planets without own category
![C/2011 PanStarrs L4 C/2011 PanStarrs L4](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/12.png)
C/2011 PanStarrs L4
Comet C/2011 PanStarrs L4 at dusk. Colors have been adapted to remove twilight sky background.
Taken on: 2013-03-26, 20:05 UTC+1
Exposures: 2000 x 2 s at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
Exposures: 2000 x 2 s at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
![First ISS First ISS](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/18.png)
First ISS
The international space station ISS passing over The Hague (distance to the station is an estimated 500km). Captured using serendipituous manual chasing on 2 out of 6000 frames.
Taken on: 2013-04-18, 22:33 UTC+2
Exposures: 6000 x 2 ms at f/20 with 24 db gain
Post-processing in The Gimp
Taken on: 2013-04-18, 22:33 UTC+2
Exposures: 6000 x 2 ms at f/20 with 24 db gain
Post-processing in The Gimp
![Better ISS Better ISS](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/31.jpg)
Better ISS
A better attempt, with shorter exposure times. Stacked the last three frames where ISS was largest, passing almost overhead.
Taken on: 2013-06-08, 01:25 UTC+2
Exposures: 3 x 500us at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
Taken on: 2013-06-08, 01:25 UTC+2
Exposures: 3 x 500us at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
![Three perspectives of ISS pass Three perspectives of ISS pass](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/35.png)
Three perspectives of ISS pass
Succeeded to capture ISS on many frames during a single pass, and combined a handful of frames for each of the three perspectives.
Taken on: 2013-08-04, 04:05 UTC+2
Exposures: 3 x 300us at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
Composited in MS Paint
Taken on: 2013-08-04, 04:05 UTC+2
Exposures: 3 x 300us at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
Composited in MS Paint
![Uranus Uranus](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/38.png)
Uranus
Not strictly speaking a small world, but it sure appears so at a distance of 3 billion kilometers :)
Taken on: 2013-09-03, 03:00 UTC+2
Exposures: 5000 x 50ms at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
Exposures: 5000 x 50ms at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
![Waning Gibbous Venus Waning Gibbous Venus](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/41.png)
Waning Gibbous Venus
Taken almost exactly at sunset, but elevation was still only about 10° altitude.
Taken on: 2013-09-05, 20:32 UTC+2
Exposures: 10000 x 500 us at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
Exposures: 10000 x 500 us at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
![ISS in Galileoscope ISS in Galileoscope](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/44.png)
ISS in Galileoscope
Fun project: Simply plug camera into Galileoscope, record video, point hand-held at ISS.
Taken on: 2013-10-23, 19:29 UTC+2
Exposures: 10 x 1 ms (of about 6000 hits) at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
Exposures: 10 x 1 ms (of about 6000 hits) at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
![Crescent Venus in Galileoscope Crescent Venus in Galileoscope](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/45.png)
Crescent Venus in Galileoscope
My first crescent view of Venus, taken at dusk through some cloudiness.
Taken on: 2013-11-23, 17:27 UTC+1
Exposures: 2400 x 5 ms at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
Exposures: 2400 x 5 ms at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
![Another Venus Crescent Another Venus Crescent](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/46.png)
Another Venus Crescent
Patient attempt to image Venus crescent with the 8" Celestron despite almost complete cloud cover.
Taken on: 2013-11-30, 17:45 UTC+1
Exposures: 300 x 2 ms at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
Exposures: 300 x 2 ms at 24 db gain
Custom stacking in HALCON
Post-processing in Registax
![Thin slice Thin slice](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/51.png)
Thin slice
Thin Venus crescent two weeks prior to inferior conjunction
Taken on: 2013-12-29, 17:30 UTC+1
Exposures: 3000 x 1.5 ms at 5 db gain
Custom stacking in HALCON
Post-processing in Registax
Exposures: 3000 x 1.5 ms at 5 db gain
Custom stacking in HALCON
Post-processing in Registax
![Venus crescent 5 hours after inferior conjunction Venus crescent 5 hours after inferior conjunction](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/66.png)
Venus crescent 5 hours after inferior conjunction
Shortly after sunset at about 2° altitude. Disc 0.4% illuminated
Taken on: 2014-01-11, 16:58 UTC+1
Exposures: 300 x 10 ms at 1 db gain
Custom stacking in HALCON
Post-processing in PixInsight
Exposures: 300 x 10 ms at 1 db gain
Custom stacking in HALCON
Post-processing in PixInsight
![Bird and Venus inferior conjunction (animation) Bird and Venus inferior conjunction (animation)](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/67.gif)
Bird and Venus inferior conjunction (animation)
Shortly after sunset at 1.4° altitude.
Taken on: 2014-01-11, 17:03 UTC+1
Exposures: 15 ms at 1 db gain
Unprocessed frames combined into animation
Exposures: 15 ms at 1 db gain
Unprocessed frames combined into animation
![Bird and Venus inferior conjunction (static) Bird and Venus inferior conjunction (static)](http://blog.chrfr.de/wp-content/uploads/wppa/thumbs/68.png)
Bird and Venus inferior conjunction (static)
Venus at 1.4° altitude and 0.4% illuminated, shortly after sunset
Taken on: 2014-01-11, 17:03 UTC+1
Exposures: 15 ms at 1 db gain
Single frame post-processed in PixInsight
Exposures: 15 ms at 1 db gain
Single frame post-processed in PixInsight
Unless otherwise stated, all astrophotos were taken with a Celestron CPC 800 XLT (8″ f/10 SCT) using a Flea 3 camera (FL3-GE-13S2-C).