David's Astronomy Pages CCD Images - Session 693 (2019-09-12)

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C/2018 W2 (Africano) - Comet     NGC 6645 - Open Cluster     Variable Stars (photometric monitoring)   - RX And, U And, Z And, TT Ari, CI Cyg, S Cyg, SS Cyg, AM Her, SS Her, U Her, BL Lac, DY Per, GK Per, FG Sge - ER UMa attempt failed due to cloud     Nearby Stars (astrometric monitoring)  - Barnards Star, EV Lac

- Night session (3.9 hours) Session operated in fully automated mode with some  interventions & monitoring during the first half of the session - Main aim of the session was to acquire images of a selection of   deep sky targets, variable stars and one or two comets     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature:  Falling  to 7.5°C (min) (Dew heaters on manual,  ? %) - CCD Temperature:  -10°/-15°C  (60 / 70% av. power) - Notes from 2019-09-12 >>

C/2018 W2 (Africano) - Comet

C/2018 W2 (Africano) (passing through Perseus) Sun Distance 1.45 AU Earth Distance 0.80 AU (119.3 million km)		C/2018 W2 (Africano) - Detail Frames aligned on comet (stars appear trailed due to movement of comet and somewhat bloated due to an image quality issue)
CCD Image (50% size) 2 x 45s exposure (average combine), 3x3 binning, C Filter 2019-09-12 22:15 UT (#693098-99) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, log scale, cropped) 8 x 45s exposure (average combine), 3x3 binning, C Filter 2019-09-12 22:18 UT (#693098-106) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
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NGC 6645 - Open Cluster

NGC 6645 / H VI-23 (Sagittarius) Hidden Treasures catalog object 84  [ Open Star Clusters ]  [ Herschel 400 Objects ] [ Hidden Treasures ]

CCD Image (70% size, linear scale) 4 x 30s exposure (average combine), 3x3 binning, C Filter 2019-09-12 20:34 UT (#693040-43) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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