13P/Olbers 2024-May-27 Dan Bartlett

_13P_Olbers_C14SCTF2_asi2600mcP_25x60sec_2024_05_27_213146PDT_JuneLake_California_USA_DEBartlett

Estimates show that this rather "fat" comet is now surpassing 8th magnitude in brightness. Rather poor conditions last night with image stability being an issue. FWHM averaged 5.0 over the sparce starfield, however I'm achieving twice the exposures (25 x 60sec) that I was able to squeeze in at the beginning of May. The central area of 13P/ Olbers appears quite large with a slight hint of tail extension - which at the start of the month was more apparent. Still a little over a month away from perihelion, and two month's away from Earth's MOID. I'm hoping for more with increasing solar activity (two large active sunspot groups AR3691 & Ar2664 appearing)

Included in the usual mix of images is a "starless" version for structure scrutiny.

Full Resolution Image:
https://astrob.in/tkumi3/B/

Observational details:
Backyard setup
scope: C14 HyperStar fl728mm D356mm
exposure: 25 x 60 sec
Seeing: 3/5
Transparency 6/10
Observer: DEBartlett
Place: June Lake_California USA

Image Info (Processed )
Projection ............... Gnomonic
Projection origin ........ [1305.963759 875.896544] px -> [RA: 6 01 42.732 Dec: +36 16 13.11]
Resolution ............... 2.132 arcsec/px
Rotation ................. -4.124 deg
Reference system ......... ICRS
Observation start time ... 2024-05-28 04:12:23 UTC
Observation end time ..... 2024-05-28 04:46:34 UTC
Geodetic coordinates ..... 119 04 46 W 37 46 51 N 2360 m
Focal distance ........... 727.57 mm
Pixel size ............... 7.52 um
Field of view ............ 1d 32' 48.5" x 1d 2' 15.1"
Image center ............. RA: 6 01 42.733 Dec: +36 16 13.12 ex: +0.010561 px ey: -0.069010 px
Image bounds:
top-left .............. RA: 6 05 22.714 Dec: +36 50 23.65 ex: -1.110549 px ey: -1.139679 px
top-right ............. RA: 5 57 40.993 Dec: +36 43 26.54 ex: +0.178250 px ey: -1.115268 px
bottom-left ........... RA: 6 05 41.515 Dec: +35 48 27.93 ex: -1.013939 px ey: +1.104340 px
bottom-right .......... RA: 5 58 05.667 Dec: +35 41 35.59 ex: +0.186308 px ey: +2.158337 px