David's Astronomy Pages CCD Images - Session 680 (2019-08-08)

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Images (S681)

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Session Notes

NGC 6835 - Spiral Galaxy C/2018 W2 (Africano) - Comet IC 5217 - Planetary Nebula     Variable Stars (photometric monitoring)   - RX And, U And, Z And, CY Aqr,SS Cyg, AM Her, U Her, BL Lac, CY Lyr, FG Sge, V Sge, WZ Sge     Nearby Stars (astrometric monitoring)  - HH And, Barnards Star, 61 Cyg, Groombridge 34, EV Lac

- All-night session,  Duration 4.5hr Session operated in fully automated mode, with minimal monitoring. - Main aim of the session was general observing with mix of variable stars, nearby stars, comets and deep sky targets.      - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature:  8.0°C (min), outdoors, 10.0°C (min), observatory - CCD Temperature:  -15°C  (75% av. power)   (last 4 targets -19°C  (100% av. power) ) - Notes from 2019-08-08 >>

NGC 6835 - Spiral Galaxy

This object (a nice edge on spiral galaxy) was imaged by accident. The planned target was the open cluster NGC 6885 (H VIII-20), but had been entered as NGC 6835 in my Targets database.

NGC 6835 (Vulpecula)

CCD Image (50% size) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2019-08-08 23:17 UT (#680065-70) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 6835  - Detail

CCD Image (100% size, linear scale, cropped) Image details as above

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C/2018 W2 (Africano) - Comet

C/2018 W2 (Africano)  (passing through Camelopardalis) Sun Distance 1.51 AU Earth Distance 1.56 AU (233.5 million km)		C/2018 W2 (Africano) - Detail
CCD Image (50% size) 6 x 45s exposure (average combine), 3x3 binning, C Filter 2019-08-09 00:23 UT (#680143-49) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, linear scale, cropped) Image details as left
More Images of C/2018 W2 (Africano)

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IC 5217 - Planetary Nebula

IC 5217 (Lacerta) Ast. Now  DeepSky Challenge Object, August 2019

CCD Image (50% size) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2019-08-09 00:33 UT (#680152-56) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 5217 - Detail Even at closer view IC 5217 still looks very star like.

CCD Image (150% size, linear scale, cropped) Image details as above

IC 5217 - Spectra Only when viewed with a spectral grating can IC 5217's planetary nebula characteristics be recognised Compare spectra of IC 5217 (with two main emission lines) with the broad emission spectra of a normal star

CCD Image (150% size, rotated, linear scale, cropped) 3 x 90s exposure (average combine), 3x3 binning, S Filter 2019-08-09 00:41 UT (#680158-61) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 5217 - Spectra Detail Zero order spectra to left. First order spectra to right.

CCD Image (150% size, rotated, linear scale, cropped) Image details as above

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