Since Sep 2006, I have an observer code with the Minor Planet Center and perform asteroid observations. A summary of my (modest) observations at least of Near-Earth Objects can be found here.

I had a long break where I did not observe any asteroids, from fall 2007 to end of 2008. The first few months it was because my telescope was with Herman ten Haaf, when I got it back in May I found out that getting it back working wasn't just something for one evening. Due to my professional commitments I only managed in Christmas holidays 2008/2009 to start again... Here I have listed the objects I have observed with some comments, starting in January 2009. Note that starting end of 2009 I have regular access to the ESA 1-m telescope OGS on Tenerife, thus I didn't observe asteroids with this telescope anymore... Check out the TOTAS webpages for info.

Table of asteroid observations by Detlef Koschny submitted to the Minor Planet Center, starting Jan 2009.
 
Date/Time Name/Number of object Number of positions reported Magnitude Comments
Total in 2009 so far 71
03 Jan 2009 99195 (2001 GH5) 2 18.0, 18.2 I tested the 'Goto' of my Pulsar drive controller, and this object was not too far from alp Per, my calibration star. That's why I picked it.
Syang 2 17.9 Close to the above
2009AT 2 20.2, 19.9 My first object from the Near-Earth Object Confirmation Page (NEO CP), where newly discoved NEOs are announced and the MPC calls for follow-up observations. When I observed it it didn't have a number yet, but the designation 9A39A28. Only I didn't immediately look at my data... To see it, I took a sequence of ca. 30 images with 1 min exposure time, then stacked the first 12 and the last 14, guiding on the object.
06 Jan 2009 137805 (1999 YK5) 1 17.4 Stack of 10 x 1 min. Tried again 2 hours later, but not visible due to clouds.
2005WS55 1 18.5 Also tried later, but no success. In this night I tried a number of other objects but no luck - in some the object was outside the field of view because of me using EaskySky and not correcting for theUT which my computer clock is running in; others were behind too many clouds. Not the best of all nights.
09 Jan 2009 137805 (1999 YK5) 4 17.1 - 17.4 I took a row of 30 images, 30 s each (because of the Moon there was high sky brightness). Stacked 10 each. About 1 hour later I did another stack of 10.
1994 AW1 4 17.0 - 19.0 Really it must have been about 18 mag. Difficult because of the bright sky. I took about 100 images 60 s each as it passed in fromt of NCG266. But it's hard to see, didn't manage to do a 'nice image'. But I  produced four stacks of 10 images each.
29 Mar 2009 5011 3 16.5-17.5 I am still not happy with the tracking of my mount... Also this object moved fast, I stacked 5 images, 1 min each. Still the asteroid was trailed. It was 0.2' off the predicted position - worth looking at!

This is a screenshot taken from Astrometrica - the red squre shows where it was expected - the trail shows where it was.
02 Apr 2009 5011 2 16.6 Moon -> bright sky background. I have stacked 5 images @ 30 s, get SNR = 17, did this two times to be sure I see the object. The position is still 0.2' off in RA.
03 Apr 2009 5011 2 16.4 Moon and haze. Staciking 3 x 30 s and 4 x 30 s. SNR = 19
841 1 16.2 3 x 30 s, SNR = 4.6. In the same image should be 5332 with 17.1 mag, but it was close to a star and not really visible. Then fog came and I had to stop.
18 Apr 2009 5011 4 15.6-15.9 Stacks of 5-10 images, very high SNR (about 40)
5332 4 Stacks of 4 images, SNR = 15. Searched for asteroid 93102 (19.8 mag) but can't find it.
93102 (Leroy) 1 19.8 In same images as 5332. I confirmed that it's the asteroid by splitting the stack in two. But for the measurement I combined all to get better SNR (still only 5)
2496 3 17.1 - 17.3 In same images as 3554
3554 3 16.9 - 17.1 Stacks of 3 images. These are rescacked to find the next two asteroids, 2496 and 35448
35448 3 18.7  19.2 Stacks of 3 images, same as 3554
4257 (Ubarti) 7 17.0 - 17.1
79349 2 19.0 - 19.1
143651 (= E3651) 4 15.4 This one was far off  the expected position, dRA = -0.2', dDec = +1.2'. Another one which was worth looking at, even though it's really bright.
20 Apr 2009 20083  2 17.0-17.3 I searched for an object from the NEOCP, BP33193 - but no luck, I guess 19.5 was too faint... This one was in the field of view.
  33481 2 17.1-17.4 As above
35448 2 18.8
137805 (1999 YK5) 2 18.8 - 19.3
143651 4 14.8 This one I also had already on 18 Apr 2009 - really bright but far from the expected position...
30 May 2009 3103 (Eger) 2 17.6-17.7
2009 BL2 2 18.0-18.5 Thin clouds
10 May 2010 21 Lutetia 3 12 On request of ESOC - they wanted updated positions for the Rosetta target asteroid. Note that I haven't been doing a lot of asteroid work at this telescope, as I was busy with the 1-m telescope of ESA (J04) the last year.

 
 


Created by dvk,  29 Sep 2006, updated 29 Apr 2011.
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