Not Necessarily Fading, Comet 13P/ Olbers Under Difficult Conditions, Aug 05, 2024UT. Occasional high clouds and some unusual brightening (Skyglow, noctilucent clouds, or maybe distant aurora) played havoc on my subframes. Most of the comet subframes looked horrible. Initially I kept only 16 frames but felt that SubframeSelector's choice of keeping 34 frames for integration made a brighter comet image, so I went with SS's 34. Actually I feel the cometaligned & integrated image shows a better representation of the comet, despite the artifacts. Comet Olbers continues easily seen in 18 x50IS binoculars Dan Full Resolution: https://astrob.in/oerqmw/C/ Backyard setup scope: RASA 11 fl620mm D279mm exposure: 34 x 60 sec Seeing: 2/5 Transparency: 6/10 (Skyglow + scattered high clouds) Observer: DEBartlett Place: June Lake_California USA (Altitude +7700ft) Image Info (Processed ): (All images processed solely using PixInsight) Projection ............... Gnomonic Projection origin ........ [512.074915 511.878222] px -> [RA: 11 41 48.560 Dec: +33 35 19.93] Resolution ............... 120.051 arcsec/px Rotation ................. 0.032 deg Reference system ......... ICRS Observation start time ... 2024-08-05 04:53:02 UTC Focal distance ........... 8.59 mm Pixel size ............... 5.00 um Field of view ............ 34d 8' 52.4" x 34d 8' 52.4" Image center ............. RA: 11 41 48.551 Dec: +33 35 20.33 ex: -0.000153 px ey: +0.000114 px Image bounds: top-left .............. RA: 13 17 33.613 Dec: +47 35 52.65 ex: -1.500091 px ey: -1.101507 px top-right ............. RA: 10 05 56.912 Dec: +47 34 46.36 ex: +2.152520 px ey: -1.097598 px bottom-left ........... RA: 12 48 08.907 Dec: +16 21 26.39 ex: -1.644064 px ey: +2.150472 px bottom-right .......... RA: 10 35 30.201 Dec: +16 22 09.88 ex: +1.943553 px ey: +1.999681 px |
Page last updated: Sun 25 Aug 08:46:55 BST 2024