Uploaded by

BAA Comet Section

Observer

dbartlett

Observed

2025 Apr 29 - 00:00

Uploaded

2025 Apr 30 - 21:52

Objects

C/2023 A3 (Tsuchinshan-ATLAS)

Planetarium overlay

Constellation

Vulpecula

Field centre

RA: 20^h15^m
Dec: +23°38'
Position angle: -2°33'

Field size

2°45' × 1°48'

Full filename

2023a3/2023a3_20250429_dbartlett.jpg

Target name

C/2023 A3 (Tsuchinshan-ATLAS)

Title

tes: Pushed the stretch in hopes of highlighting the extent of the tail. Anti-Tail can be seen once again, very faint. Tsuchinishan - ATLAS is moving at 0.22 deg/day I've included the Finson & Probstein (FP) model so the observer can compare. Full resolution link: https://app.astrobin.com/i/8qji65?r=B Observational Notes: scope: C14 fl729mm F/2 Camera: asi6200mcP image: 27x300sec Seeing: 4/5 Transparency: 9/10 Observer: DEBartlett Place: JuneLake California USA (Altitude +2434m) Image Info (all ): Down sampled 2x2 (CMOS = BIN 2x2) (All images processed solely using PixInsight) Projection ............... Gnomonic Projection origin ........ [4693.107928 3063.603160] px -> [RA: 20 15 25.109 Dec: +23 38 52.63] Resolution ............... 2.12 arcsec/px Rotation ................. -2.503 deg Reference system ......... ICRS Focal distance ........... 730.70 mm Pixel size ............... 3.76 um Field of view ............ 2d 46' 3.3" x 1d 48' 23.1" Image center ............. RA: 20 15 25.109 Dec: +23 38 52.57 ex: +0.000108 px ey: +0.080808 px Image bounds: top-left .............. RA: 20 21 33.744 Dec: +22 48 04.43 ex: -1.544295 px ey: -1.399854 px top-right ............. RA: 20 09 36.916 Dec: +22 40 57.45 ex: +0.246302 px ey: -1.851178 px bottom-left ........... RA: 20 21 18.262 Dec: +24 35 57.42 ex: -1.502040 px ey: +1.307885 px bottom-right .......... RA: 20 09 11.555 Dec: +24 28 45.95 ex: +0.151917 px ey: +0.790582 px