David's Astronomy Pages CCD Images - Session 876 (2021-03-26)

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Session Notes

7P/Pons-Winnecke - Comet C/2020 R4 (ATLAS) - Comet C/2020 T2 (Palomar) - Comet     AT 2021ckv - Type YSO Transient  (PR Ori) AT 2021gux - Type CV Transient  (TT Boo)     IC 992 - Spiral Galaxy with Type Ic Supernova 2021dwg     Variable Stars (photometric monitoring) - R CrB, AM Her, SS Her, U Her, BL Lac     Nearby Stars (astrometric monitoring) - Barnards Star, 61 Cyg

- All Night session (7.9 hours) - Main aims of the session were to acquire a selection of variable star, nearby star and comet targets and deep sky targets as cloud allowed - Session interrupted by long interval of cloud between 20:45 & 02:00 - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: -1°C (min) - CCD Temperature:  -20°/-25°C - Notes from 2021-03-26 >>    [ Local Files >> ]   -

7P/Pons-Winnecke - Comet

7P/Pons-Winnecke (passing through Serpens) Sun Distance 1.44 AU (approaching) Earth Distance 0.86 AU (128.6 million km) Expected position of comet shown by white circle		7P/Pons-Winnecke - 2021-03-27, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 112.61 arcsec/hr, Dec -6.87 arcsec/hr) Comet is indicated by white cross-hairs.
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-03-27 03:21 UT (#876062-64) 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) 8 x 45s exposure (average combine), 3x3 binning, C Filter 2021-03-27 03:25 UT (#876062-76) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 7P/Pons-Winnecke on Comets 2021 Page >>

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C/2020 R4 (ATLAS) - Comet

C/2020 R4 (ATLAS) (passing through Aquila) Sun Distance 1.11 AU Earth Distance 1.06 AU (158.2 million km)		C/2020 R4 (ATLAS)  - 2021-02-27, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -92.18 arcsec/hr, Dec 73.32 arcsec/hr)
CCD Image (50% size, square root scale) 3 x 30s exposure (average combine), 3x3 binning, C Filter 2021-03-27 04:06 UT (#876114-16) 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) 15 x 30s exposure (average combine), 3x3 binning, C Filter 2021-03-27 04:10 UT (#876114-28) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2020 R4 (ATLAS) on Comets 2021 Page >>

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C/2020 T2 (Palomar) - Comet

C/2020 T2 (Palomar) (passing through Canes Venatici) Sun Distance 2.41 AU (approaching) Earth Distance 1.58 AU (236.9 million km) Comet indicated by white cross-hairs		C/2020 T2 (Palomar) - 2021-03-27, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -11.60 arcsec/hr, Dec 10.51 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 2 x 45s exposure (average combine), 3x3 binning, C Filter 2021-03-27 02:09 UT (#876013-14) 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) 6 x 45s exposure (average combine), 3x3 binning, C Filter 2021-03-27 02:10 UT (#876013-18) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2020 T2 (Palomar) on Comets 2021 Page >>

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AT 2021ckv - Type YSO Transient  (PR Ori)

AT 2021ckv / PR Ori  (Orion) AT 2021ckv (Type: YSO) discovered 2021/02/08.759 UT by Gaia Alias: Gaia21arx, GCVS PR Ori

AT 2021ckv / PR Ori - 2021-03-26 (T+46.1d) Image below (2021-03-26.854) was taken 46.1 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.45 (vs normal range of +12.2 to +13.6)

Annotated CCD Image  (50% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-26 20:38 UT (#876005-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021ckv (PR Ori) on Transients 2021 Page >>

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AT 2021gux - Type CV Transient  (TT Boo)

AT 2021gux  (Bootes) AT 2021gux (Type: CV) discovered 2021/03/21.599 UT by Gaia Alias: Gaia21blj, TT Boo  Discovery Magnitude 13.53 (g-Gaia Filter) vs  Historical Magnitude 17.19 +/- 1.79 ~5.5 mag outburst in known CV TT Boo Gaia, 2021-01-27 21:17, Mag 18.85 Gaia, 2021-03-21 16:09, Mag 13.46 Gaia, 2021-05-04 08:39, Mag 17.95 Gaia, 2021-05-19 08:44, Mag 19.00  ( TNS 2021gux  | Gaia21blj )

AT 2021gux - Known CV Star TT Boo  (T+5.6d) Position of CV is shown by white cross-hairs.

Annotated CCD Image  (50% size, linear scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-27 03:40 UT (#876079-83) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021gux / TT Boo - 2021-03-27 (T+5.6d) Image below (2021-03-27.151) was taken 5.6 days after discovery of 2021guxv Position of CV is shown by white cross-hairs. Measured Magnitude +13.8 (Clear Filter)

Annotated CCD Image  (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-27 03:40 UT (#876079-83) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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IC 992 - Spiral Galaxy with Type Ic Supernova 2021dwg

IC 992 with SN 2021dwg (Virgo) SN 2021dwg (Type: Ic) discovered 2021/02/27.420 UT by ZTF Alias: ZTF21aannoix Magnitude +18.44 at discovery  (Rochester Supernova site )

IC 992 with SN 2021dwg - 2021-03-27 (T+27.7d)

Annotated CCD Image  (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-27 02:27 UT (#876022-25) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 992 with SN 2021dwg - 2021-03-27 (T+27.7d) Image below (2021-03-27.097) was taken 27.7 days after discovery of 2021dwg

Annotated CCD Image  (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-27 02:27 UT (#876022-25) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021dwg (IC 992) on Supernovae 2021 Page >>

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