David's Astronomy Pages Images - Session 1152 (2023-10-01)

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29P/Schwassmann-Wachmann - Comet C/2017 K2 (PANSTARRS) - Comet     AT 2023ctk - Type YSO Transient AT 2023tdi - Type BL Transient (QSO B1028+511)     LEDA 4201363 - Galaxy with Type II Supernova 2022vik     NGC 1640 - Spiral Galaxy with Unconfirmed Transient AT 2023pow       - AT2023tki attempt failed (due to cloud)     Variable Stars (photometric monitoring) - None      Nearby Stars (astrometric monitoring) - DX Cnc     - Barnards Star attempt rejected (due to cloud/too few stars) -

- All-night session (8.4 hrs).     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 8°C (min) - CCD Temperature:   -15° C - Notes from 2023-10-01 >>     -

29P/Schwassmann-Wachmann - Comet

29P/Schwassmann-Wachmann - 2023-10-02 (passing through Cancer) Sun Distance 6.14 AU (receeding) Earth Distance 6.52 AU (974.7 million km)		29P/Schwassmann-Wachmann - 2023-10-02 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 19.12 arcsec/hr, Dec -5.04 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 10 x 60s exposure (average combine), 3x3 binning, Clear Filter 2023-10-02 02:55 UT (#1152045-55) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, square root scale, cropped) Image details as left
Images of 29P/Schwassmann-Wachmann on Comets 2023 Page >>

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C/2017 K2 (PANSTARRS) - Comet

C/2017 K2 (PANSTARRS) - 2023-10-02 (passing through Monoceros) Sun Distance 3.80 AU (receeding) Earth Distance 3.76 AU (562.0 million km)		C/2017 K2 (PANSTARRS) - 2023-10-02 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -4.14 arcsec/hr, Dec -0.57 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 9 x 45s exposure (average combine), 3x3 binning, Clear Filter 2023-10-02 04:40 UT (#1152088-96) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, square root scale, cropped) Image as left
Images of C2017 K2 (PANSTARRS) on Comets 2021 Page >>
Images of C2017 K2 (PANSTARRS) on Comets 2022 Page >>
Images of C2017 K2 (PANSTARRS) on Comets 2023 Page >>

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AT 2023ctk - Type YSO Transient

AT 2023ctk (Orion) AT 2023ctk (Type: YSO) discovered 2023-03-03.857 UT by Gaia Alias: Gaia23azb, EM* LkHA 294 Discovery Mag 16.3 (G-Gaia Filter) vs Historic Mag 15.05 Dimming in known YSO (Young Stellar Object) ( TNS 2023ctk | Gaia23azb )

AT 2023ctk - 2023-10-02 (T+212.3d) Image below (2023-10-02.175) was taken 212.3 days after discovery of 2023ctk Position of earlier transient (distinct) is shown by white cross-hairs Measured Magnitude +15.27 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-10-02 04:21 UT (#1152081-85) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023ctk on Transients 2023 Page >>

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AT 2023tdi - Type BL Transient (QSO B1028+511)

AT 2023tdi (Ursa Major) AT 2023tdi (Type: BL) discovered 2023-09-15.424 UT by Gaia Alias: Gaia23ckv,  QSO B1028+511 Discovery Mag 16.34 (G-Gaia Filter) vs Historic Mag 14.06 Known BL Lac type object (QSO B1028+511) brightens by 0.5 mag ( TNS 2023tdi | Gaia23ckv )

AT 2023tdi - 2023-10-02 (T+16.7d) Image below (2023-10-02.144) was taken 16.7 days after discovery of 2023tdi Position of reported transient (faint) is shown by white cross-hairs Measured Magnitude +15.64 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-10-02 03:37 UT (#1152065-69) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023tdi on Transients 2023 Page >>

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LEDA 4201363 - Galaxy with Type II Supernova 2022vik

LEDA 4201363 with SN 2022vik (Leo) SN 2022vik (Type: II) discovered 2022-09-20.518 UT by ZTF Alias: ZTF22abgveih  ( TNS2022vik )

LEDA 4201363 with SN 2022vik - 2023-10-02 (T+376.6d) Image below (2023-10-02.135) was taken 376.6 days after discovery of 2022vik Position of galaxy with supernova (not separately distinguishable) is shown by white cross-hairs Measured magnitude ? (unable to measure) Poor quality image (poor sky transparency, bright moonlit sky background)

Annotated CCD Image (125% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-10-02 03:18 UT (#1152061-62) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

LEDA 4201363 with SN 2022vik - Earlier Image 2022-11-24 (T+64.6d) Image below (2022-11-24.088) was taken 64.6 days after discovery of 2022vik Position of galaxy with supernova (not separately distinguishable) is shown by white cross-hairs Measured magnitude +15.89 (galaxy + supernova)

Annotated CCD Image (125% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2022-11-24 02:16 UT (#1060076-77) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2022vik (LEDA 4201363) on Supernova 2022 Page >>

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NGC 1640 - Spiral Galaxy with Unconfirmed Transient AT 2023pow

NGC 1640 with AT 2023pow (Eridanus) AT 2023pow (Type: unconf) discovered 2023-08-15.786 UT by Masayuki Iwamoto Discovery Mag 15.2 (Clear Filter) ( TNS 2023pow )

NGC 1640 - Spiral Galaxy

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-10-02 04:01 UT (#1152072-76) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1640 with AT 2023pow - 2023-10-02 (T+47.4d) Image below (2023-10-02.161) was taken 47.4 days after discovery of 2023pow Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-10-02 04:01 UT (#1152072-76) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023pow (NGC 1640) on Transients 2023 Page >>

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