David's Astronomy Pages CCD Images - Session 743 (2020-01-19)

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Images (S744)

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Session Notes

Minkowski 1-8 - Planetary Nebula (PN G210.3+1.9) 3C 58 - Supernova Remnant (attempt)     Variable Stars (photometric monitoring)   - RX And, Z And, AM CVn, SY Cnc, R CrB, S Cyg, SS Cyg, U Gem, AM Her, SS Her, U Her, RZ LMi, BL Lac, CY Lyr, FU Ori, DY Per, GK Per, FG Sge, V Sge, RR Tau, ER UMa - FO Ori attempt failed (aborted)     Nearby Stars (astrometric monitoring)  - None

- All night session (8 hours total). Shutter closed at 04:34 after Job Queue hung. - Main aims of the session was to acquire a selection of targets, including variable stars, nearby stars and a few specially selected deep sky objects.     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature:  -1°C (min) , rise to 4.5 deg in 15 min as warm front came through at 02:45 (Dew heaters on auto) - CCD Temperature:  -25°/-20°C  (80%/70% av. power) - Notes from 2020-01-19 >>

Minkowski 1-8 - Planetary Nebula (PN G210.3+1.9)

Minkowski 1-8 in Monoceros was the Deep Sky Challenge Object in Astronomy Now Magazine for Feb 2020
It proved to be quite difficult to track down.   I couldn't find a positional reference in TheSky6 for PN G210.3+1.9, but the finder chart in the magazine (but not the coordinates) implied it had a position that corresponded to planetary nebula PLN 210+ 1.1.

Centering on PLN 210+1.1 coordinates RA 06 53 31.404, Dec +03 12 13.64 (Epoch 2000) no planetary nebula could be seen at that location (absence confirmed by reviewing spectroscopic images.   However  some 3.8' to the south there was a small smudge of light (unnamed in TheSky6) at RA 06 53 33.79, Dec +03 08 26.59 (Epoch 2000) that has a spectrographic signature of a planetary nebula.   This is believed to be Minkowski 1-8.

Minkowski 1-8 (Monoceros) Ast. Now Deep Sky Challenge Object, Feb 2020 Pl.Neb highlighted by white cross-hairs

Annotated CCD Image (50% size, linear scale) 4 x 30s exposure (average combine), 3x3 binning, C Filter 2020-01-19 23:26 UT (#743015-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Minkowski 1-8 - Detail (Pl.Neb at centre of cropped image) Est. Mag +15.1

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

Minkowski 1-8 - Location (Pl.Neb location believed to be Minkowski 1-8)

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

Minkowski 1-8 - Spectrographic Image (created using Star Analyser 2000 diffraction grating)

CCD Image (100% size, linear scale, rotated, cropped) 5 x 60s exposure (average combine), 2x2 binning, S Filter 2020-01-19 23:32 UT (#743022-26) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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

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3C 58 - Supernova Remnant (attempt)

3C 58 (Cassiopeia) Attempted image of supernova remnant 3C 58 (not visible)

CCD Image (50% size) 8 x 180s exposure (average combine), 3x3 binning, C Filter 2020-01-20 02:03 UT (#743073-82) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

3C 58 Region Image affected by poor seeing but no sign of supernova remnant in this image  (24 min total exposure )

CCD Image (85% size, cropped) Image details as above

3C 58 Region - Detail Again no sign of  supernova remnant in this image  when image is pushed to maximum contrast

CCD Image (85% size, cropped) Image details as above

3C 58 - Reference Image  (Credit: NASA/CXC/SAO) https://www.nasa.gov/chandra/multimedia/chandra-15th-anniversary-3c58.html

Reference Image rescaled to same scale as above image

3C 58 Region - Earlier Image (2020-01-18) Image affected by wind / surface & jet stream, uneven guiding

CCD Image (85% size, cropped) 5 x 180s exposure (average combine), 3x3 binning, DB Filter 2020-01-18 23:14 UT (#742063-69) 12" LX200R (at f/10.4) + ST-10XME Attempted auto-guiding using TS 80mm APO, ZWO ASI178MC & PHD2

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