David's Astronomy Pages Images - Session 648 (2019-01-20)

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Images (S649)

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Session Notes

38P/Stephan-Oterma - Comet 46P/Wirtanen - Comet     AT2018lcl - Extra-Galactic Nova in M31        - NGC 3254 with SN 2019np (T+11.1d) attempt failed (bright sky/poor sky transparency)      Photometric Monitoring - Variables   - RX And, U And, Z And, CI Cyg, S Cyg, SS Cyg, BL Lac, FU Ori, NV Ori,DY, DY Per, GK Per, V Sge, RR Tau, SU Tau - AM CVn, SY Cnc, RZ LMi, U Mon, CN Ori & ER UMa attempts failed (high cloud /poor sky transparency)     Astrometric Monitoring - Nearby Stars  - HH And, 61 Cyg, Groombridge 34, Teegardens Star - LAMOST-HVS1 attempt failed (high cloud / poor sky transparency)

- Evening Night Session (6.2 hours duration) . Session operated in fully automated mode, but monitored over remote connection, with interventions to insert 3 ToO targets and resolve a SBIG Camera disconnection Sky quality poor with full moon and high clouds reducing sky transparency - Main aim of the session was acquire images of a selection of nearby stars, variable stars and deep sky objects taking advantage of moderate weather conditions. Secondary aim was to test recent  changes and additions to AstroMain program     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature:  -0.5°C (minimum)  - CCD Temperature:  -25°C (68% av. power) - Notes from 2019-01-20 >>

38P/Stephan-Oterma - Comet

38P/Stephan-Oterma (passing through Lynx) Sun Distance 1.82 AU Earth Distance 0.88 AU (131.9 million km)

CCD Image (50% size) 7 x 30s exposure (average combine), 3x3 binning, C Filter 2019-01-20 17:51 UT (#648003-09) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

38P/Stephan-Oterma (passing through Lynx) Sun Distance 1.72 AU Earth Distance 0.79 AU (118.6 million km)

CCD Image (50% size, linear scale) 3 x 30s exposure (average combine), 3x3 binning, C Filter 2019-01-03 01:48 UT (#647346-49) 12" LX200R (at f/10.4) + ST-10XME (Autoguided on a guide star using TS 80mm APO + ZWO ASI178MC)

CCD Image (50% size, log scale) Image details as above

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

38P/Stephan-Oterma  - RotationalGradient Processing (Processing performed in IRIS 5.59)

Processed CCD Image (100% size, 15 deg rotational shift, cropped) Image details as above

38P/Stephan-Oterma - Earlier Image (2018-12-24) (passing through Cancer) Sun distance 1.68 AU.

Annotated CCD Image (50% size) 5 x 30s exposure ( average combine), 3x3 binning, C Filter  2018-12-24 23:23 UT (#644292-97) 12" LX200R  (at f/10.4) + ST-10XME (Autoguided on a guide star using TS 80mm APO + ZWO ASI178MC)

38P/Stephan-Oterma - Earlier Image (2018-12-04) (passing through Cancer) Sun distance 1.62 AU.

Annotated CCD Image (50% size) 5 x 30s exposure ( average combine), 3x3 binning, C Filter  2018-12-04 00:30 UT (#639041-47) 12" LX200R  (at f/10.4) + ST-10XME (Autoguided on a guide star using TS 80mm APO + ZWO ASI178MC)

38P/Stephan-Oterma  - Earlier Image (2018-11-08) (passing through Gemini) Sun distance 1.59 AU.

CCD Image (50% size) 26 x 30s exposure ( aligned on comet, average combine), 3x3 binning, C Filter  2018-11-08 03:32 UT (#636029-59) 12" LX200R  (at f/10.4) + ST-10XME (Autoguided on a guide star using TS 80mm APO + ZWO ASI178MC)

38P/Stephan-Oterma  - Earlier Image (2018-10-21) (passing through Gemini) Sun distance 1.61 AU.

CCD Image (50% size) 7 x 30s exposure (average combine), 3x3 binning, C Filter  2018-10-21 20:03 UT (#633206-12) 12" LX200R  (at f/10.4) + ST-10XME (Autoguided using TS 80mm APO + ZWO ASI178MC)

38P/Stephan-Oterma - Earlier detail  (2018-10-21)

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

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46P/Wirtanen - Comet

46P/Wirtanen (passing through Ursa Major) Sun Distance 1.18 AU Earth Distance 0.24 AU (35.4 million km)
CCD Image (50% size, linear scale) 19 x 15s exposure (average combine), 3x3 binning, C Filter 2019-01-20 19:39 UT (#648111-29) 12" LX200R (at f/10.4) + ST-10XME
More Images of 46P/Wirtanen
46P/Wirtanen  - Earlier Image (2018-12-16) (passing through Taurus) Near to point of closest distance from earth Sun Distance 1.06 AU Earth Distance 0.08 AU (11.6 million km)		46P/Wirtanen  - Earlier Detail (2018-12-16)
CCD Image (50% size, linear scale) 15s exposure (single frame), 3x3 binning, C Filter  2018-12-16 21:03 UT (#641184) 12" LX200R  (at f/10.4) + ST-10XME		CCD Image (50% size, log scale) 31 x 15s exposure (average combine), 3x3 binning, C Filter  2018-12-16 21:03 to 21:16 UT (#641184-222) 12" LX200R  (at f/10.4) + ST-10XME (Autoguided on comet using TS 80mm APO + ZWO ASI178MC & PHD2)

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AT2018lcl - Extra-Galactic Nova in M31 Galaxy

AT2018lcl - Nova in M31  (Andromeda) AT2018lcl, TNS discovered 2018/12/30.855 by Emmanuel Conseil  ( Rochester Extragalactic Novae Page |  Discovery Image ) No sign of object ot the position of the earlier nova (white cross-hairs) Image (2019-01-20.89) was taken 21.0 days after discovery Image taken under full moon conditions and doesn't have the  magnitude reach of the earlier image

Annotated CCD Image (100% size, cropped) 4 x 120s exposure (average combine), 3x3 binning, C Filter 2019-01-20 21:21 UT (#648228-31) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT2018lcl - Earlier Image (2019-01-02) Nova is shown in the image below by white cross-hairs. Image (2019-01-02.98) was taken 3.1 days after discovery Estimated Magnitude +17.0 (vs + 15.9 at discovery)

Annotated CCD Image (100% size, cropped) 2 x 120 sec exposure (average combine), 3x3 binning, C Filter 2019-01-02 23:33 UT (#647246-47) 12" LX200R  (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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