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Comet 81P (Wild), 17 may 2010 20 exposures of 60s each, dark and flat corrected. Time of acquisition was between 22h50 and 23h15 UT, air mass ratio = 1.939 Approx position = 14h02m50s / -05°05'00" Moon illuminated fraction = 0.18 / height = 5 deg The comet was close to Meridian at the beginning of the night, though only at declination -5 deg. According to MPC, the comet has magnitude 10.4. |
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Comet 81P (Wild), 19 May 2010 21 exposures of 60s each, dark and flat corrected. Time of acquisition was between 21h50 and 22h20 UT, air mass ratio = 1.830 Approx position = 14h02m54s / -05°11'15" Moon illuminated fraction = 0.38 / height = 25 deg The magnitude of sky background per arcsec^2 was estimated to 17.5, by comparison with Nomad catalog (via Aladin). Comet magnitude = 10.5 (MPC). |
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Comet C/2008 FK 75 (Lemmon Siding-Spring), 23 may 2010 60 exposures of 30 sec, dark and flat corrected. Time of acquisition was between 0h45 and 1h35 UT (24 May), air mass ratio = 1.047 Approx position = 17h58m54s / +37°29'30" Moon illuminated fraction = 0.82 / height = 10 deg The comet was quite high in the sky, in Herculus constellation. Comparing the final frame with Nomad catalog (via Aladin) I found that stars up to magnitude V=19.5 are well visible on the final picture. According to MPC, the comet has magnitude 14.7. |
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Same image, co-registration on comet |