David's Astronomy Pages (Solar System) Comets - 2018

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	Comet Images (2018)	This page summarises observations and images of comets in 2018
	21P/Giacobini-Zinner (May, Sep 2018)
	37P/Forbes (Aug-Sep 2018)
	C/2016 R2 (PANSTARRS) (Dec 2017 to Aug 2018)

21P/Giacobini-Zinner - Comet

21P/Giacobini-Zinner (2018-09-15) (Passing through starfield in Gemini) Sun Distance 1.82 AU Earth Distance ~ 0.39 AU

CCD Image (50% size, linear scale) 30 sec exposure (single frame), 3x3 binning, C Filter 2018-09-15 01:18 UT (#629521) 12" LX200R  (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 [ Full Size Image ]

21P/Giacobini-Zinner - Detail  (2018-09-15)

CCD Image (50% size, log scale) Image details as above [ Full Size Image ]

False Colour CCD Image (50% size, log scale) Inverse Spectrum Image details as above

21P/Giacobini-Zinner - Animated Image (2018-09-15) showing 3.28 arc min movement of comet over a 41 minute interval (i.e. movement of 4.8 arc min/hour or 1.92 arc deg/day)

Animated CCD Image (100% size, linear scale, cropped) 40 x 30 sec frames, 3x3 binning, C Filter 2018-09-15 01:18 to 02:00 UT (#629521-80) 12" LX200R  (at f/10.4) + ST-10XME Auto-guided on star using TS 80mm APO, ZWO ASI178MC & PHD2

21P/Giacobini-Zinner - Other Images (2018-09-15)

Composite CCD Image (50% size, logscale) 14 x 15 sec exposure (aligned on comet, average combine) 3x3 binning, C Filter 2018-09-15 02:35 to 02:42 UT (#629621-35) 12" LX200R  (at f/10.4) + ST-10XME Auto-guided on star using TS 80mm APO, ZWO ASI178MC & PHD2 [ Full Size Image ]

False Colour CCD Image (50% size, log scale) Inverse Spectrum Image details as above

Composite CCD Image (72% size, log scale) 40 x 30 sec exposure (aligned on comet, average combine) 3x3 binning, C Filter 2018-09-15 01:18 to 02:00 UT (#629521-80) 12" LX200R  (at f/10.4) + ST-10XME Auto-guided on star using TS 80mm APO, ZWO ASI178MC & PHD2 [ Full Size Image ]

21P/Giacobini-Zinner - Rotational Gradient (2018-09-15) 15 deg rotational shift (Processing performed in IRIS 5.59)

Processed CCD Image (100% size, rotational gradient, cropped) 5 x 30 sec exposure (aligned on comet, average combine) 3x3 binning, C Filter 2018-09-15 01:20 UT (#629621-25) 12" LX200R  (at f/10.4) + ST-10XME Auto-guided on star using TS 80mm APO, ZWO ASI178MC & PHD2

21P/Giacobini-Zinner - Wider View through TS 80mm APO scope  (2018-09-15)

Colour CMOS Image (16% size) 12 x 10s (Live Stack Combine) 1x1 binning, Gain 400 Total Exposure 120s 2018-09-15 02:58 UT (#02_58_53Z) TS 80mm f/6 APO + ASI178MC (OSC) Mounted on 12" LX200R [ Larger Image , 29% size ]

Colour CMOS Image (100% size, cropped) Image details as above

21P/Giacobini-Zinner  (2018-05-18)  (passing through Vulpecula) Sun Distance 1.81 AU

CCD Image (50% size) 4 x 30s sec exposure (average combine), 3x3 binning, C Filter 2018-05-18  01:45 h UT (#611179-83) 12" LX200R  (at f/5.7) + ST-10XME

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

21P/Giacobini-Zinner  (2018-05-17) (passing through Vulpecula) Sun Distance 1.82 AU

CCD Image (100% size, cropped) 3 x 60s sec exposure (average combine), 3x3 binning, C Filter 2018-05-17  01:26 h UT (#610073-75) 12" LX200R  (at f/5.7) + ST-10XME

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37P/Forbes - Comet

37P/Forbes (passing through star-field in Pisces) Sun Distance 2.05 AU Comet is marked by white cross hairs. Two faint galaxies in the image are PGC 85401 (catalog mag +16.8) & PGC 70646 (catalog mag +16.7)

Annotated CCD Image (50% size) 3 x 60 sec exposure (average combine), 3x3 binning, C Filter 2018-09-15 00:12 UT (#629498-500) 12" LX200R  (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 [ Full Size Image ]

37P/Forbes  - 2018-09-18 Sun Distance 2.07 AU. Passing through star-field in Pisces

Annotated CCD Image (100% size, cropped) 5 x 60 sec exposure (average combine), 3x3 binning, C Filter 2018-09-18 21:49 UT (#630060-64) 12" LX200R  (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

37P/Forbes - 2018-09-15 Sun Distance 2.05 AU. Passing through star-field in Pisces

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

37P/Forbes - 2018-09-08 Sun Distance 2.02 AU

Annotated CCD Image (100% size, cropped) 5 x 60 sec exposure (average combine), 3x3 binning, C Filter 2018-09-08 22:33 UT (#627002-06) 12" LX200R  (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

37P/Forbes - 2018-08-31 Sun Distance 1.98 AU

Annotated CCD Image (100% size, cropped) 5 x 60 sec exposure (average combine), 3x3 binning, C Filter 2018-08-31 23:09 UT (#623111-15) 12" LX200R  (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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C/2016 R2 (PANSTARRS) - Dec 2017 to Aug 2018

C/2016 R2 (PANSTARRS) - 2018-09-19 (passing through Ursa Major) Sun distance 2.95 AU. Faint Galaxy too right is  PGC 2324722, catalog mag +17.5)

Annotated CCD Image (100% size, Cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter  2018-09-19 00:48 UT (#630180-84) 12" LX200R  (at f/10.4) + ST-10XME (Autoguided using TS 80mm APO + ZWO ASI178MC)

C/2016 R2 (PANSTARRS) - 2018-08-24 (passing through Ursa Major) Sun distance 2.84 AU, Est. Mag +15.8. The tiny galaxy at below left is PGC 2393752, catalog mag +17.4)

Annotated CCD Image (100% size, Cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter  2018-08-24 02:09 UT (#621132-36) 12" LX200R  (at f/10.4) + ST-10XME (Autoguided using TS 80mm APO + ZWO ASI178MC) (Average Guide Error 0.9" rms, PHD2)

C/2016 R2 (PANSTARRS) -  2017-12-13 (passing through Gemini) Sun distance 3.02 AU (Bright object in upper-left corner of the image is the +7.2 mag star HIP 22221)

CCD Image (50% size, Linear Scaling) 2 x 60s exposure (average combine), 3x3 binning, C Filter  2017-12-13 22:29h UT (#607079-80) 12" LX200R  (at f/10.4) + ST-10XME (Autoguided using TS 80mm APO + ZWO ASI178MC)

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