Continuing the exercise in plasma tail disruption, here is comet 13P/ Olbers showing an up and down variance seen before in previous images. Only used 28 x 60second subs for stacking due to a faint undulation of what appeared to be noctilucent clouds. Dan Full Resolution: https://astrob.in/8s4vnc/B/ Backyard setup scope: RASA 11 fl620mm D279mm exposure: 31 x 60 sec Seeing: 3/5 Transparency 6.5/10 noctilucent clouds Observer: DEBartlett Place: June Lake_California USA (Altitude +7700ft) Image Info (Processed ): (All images processed solely using PixInsight) Projection ............... Gnomonic Projection origin ........ [2304.399633 1504.024450] px -> [RA: 11 13 40.012 Dec: +36 14 34.58] Resolution ............... 2.512 arcsec/px Rotation ................. 1.549 deg Reference system ......... ICRS Observation start time ... 2024-07-30 05:15:46 UTC Focal distance ........... 617.54 mm Pixel size ............... 7.52 um Field of view ............ 3d 12' 56.6" x 2d 5' 55.3" Image center ............. RA: 11 13 40.029 Dec: +36 14 34.67 ex: +0.080261 px ey: -0.016085 px Image bounds: top-left .............. RA: 11 21 52.978 Dec: +37 13 52.23 ex: -0.183689 px ey: -1.127672 px top-right ............. RA: 11 05 43.683 Dec: +37 19 02.70 ex: -2.010269 px ey: -0.659354 px bottom-left ........... RA: 11 21 22.444 Dec: +35 08 15.13 ex: +0.844419 px ey: +2.165324 px bottom-right .......... RA: 11 05 40.408 Dec: +35 13 23.47 ex: -0.654512 px ey: +1.116581 px |
Page last updated: Sun 25 Aug 08:46:37 BST 2024