103p 20230815 dbartlett

103P/ Hartley continues to brighten and close in on both the Earth and sun's perihelion (predicted to be at the comet's brightest) in early October.  We'll see...
 
 Observational details:
Backyard setup
scope: C14 D = 356mm; fl =729mm; F# 2
camera: asi 2600mcP
exposure: 80 x60 sec
Seeing: 4/5
Transparency: 9/10
Observer: DEBartlett
Location: June Lake, California, USA
 
Image Details (all)
WCS transformation ....... Linear
Projection ............... Gnomonic
Projection origin ........ [1030.039173 1519.977604] px -> [RA:  1 06 45.448  Dec: +36 01 31.68]
Resolution ............... 2.127 arcsec/px
Rotation ................. -3.943 deg
Reference system ......... ICRS
Observation start time ... 2023-08-15 10:26:09 UTC
Observation end time ..... 2023-08-15 10:27:09 UTC
Geodetic coordinates ..... 119 04 46 W  37 46 30 N  2357 m
Focal distance ........... 729.30 mm
Pixel size ............... 7.52 um
Field of view ............ 1d 13' 2.5" x 1d 47' 47.3"
Image center ............. RA:  1 06 45.455  Dec: +36 01 31.63
Image bounds:
   top-left .............. RA:  1 09 29.241  Dec: +36 57 40.65
   top-right ............. RA:  1 03 24.639  Dec: +36 52 34.45
   bottom-left ........... RA:  1 10 01.966  Dec: +35 10 08.34
   bottom-right .......... RA:  1 04 05.522  Dec: +35 05 09.03