Uploaded by

BAA Comet Section

Observer

dbartlett

Observed

2025 Apr 22 - 00:00

Uploaded

2025 Apr 27 - 05:30

Objects

C/2025 F2

Planetarium overlay

Constellation

Triangulum

Field centre

RA: 01^h38^m
Dec: +35°04'
Position angle: +36°17'

Field size

0°45' × 0°34'

Full filename

2025f2/2025f2_20250422_dbartlett.jpg

Target name

C/2025 F2

Title

C/2025 F2 SWAN 2025_Apr_22 050640local Notes: Comet appeared fainter than any previous morning. Increased twilight and still present moonlight. Imaged from 3 degrees to 9 degrees above local horizon. Background gradients present in images due to horizon. Comet aligned w stars Integrated w median combination No rejection & JPEG Full resolution @ highly cropped. SPCC color calibrated for truest color in non inverted images. All cropped images have standardized background (brightness)From April19 onward. No ASTROBIN post Observational details: Backyard setup scope: C14 D = 356mm; fl =729mm; F# 2 camera: asi 6200mcP exposure: 25 x15 sec Seeing: 4/5 Transparency: 8/10 Seeing - Heavy Twilight, Low Waning Crescent Moonlight Observer: DEBartlett Location: June Lake, California, USA Image Info (Cropped Closeup ): Projection ............... Gnomonic Projection origin ........ [1272.809365 970.427857] px -> [RA: 1 38 39.360 Dec: +35 04 45.79] Resolution ............... 1.070 arcsec/px Rotation ................. 36.907 deg Reference system ......... ICRS Observation start time ... 2025-04-22 11:58:16 UTC Observation end time ..... 2025-04-22 12:13:52 UTC Geodetic coordinates ..... 119 04 46 W 37 46 51 N 2434 m Focal distance ........... 724.90 mm Pixel size ............... 3.76 um Field of view ............ 45' 23.9" x 34' 36.6" Image center ............. RA: 1 38 39.359 Dec: +35 04 45.79 ex: +0.022097 px ey: +0.010099 px Image bounds: top-left .............. RA: 1 40 58.748 Dec: +35 04 52.55 ex: -1.135896 px ey: -1.103893 px top-right ............. RA: 1 37 59.539 Dec: +35 32 12.20 ex: +0.028088 px ey: -1.115450 px bottom-left ........... RA: 1 39 18.519 Dec: +34 37 21.18 ex: -1.642507 px ey: +1.014150 px bottom-right .......... RA: 1 36 1