David's Astronomy Pages CCD Images - Session 893 (2021-04-30)

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Session Notes

C/2020 T2 (Palomar) - Comet     NGC 3310 - Spiral Galaxy (Herschel IV-60) with Type II Supernova 2021gmj NGC 4165 - Spiral Galaxy with Type II Supernova 2021gno     UGCA 271 - Irregular Galaxy (PGC 38481) UGC 8426 - Spiral Galaxy with Transient AT 2021knq       - NGC 5018 w/SN2021fxy attempt failed (due to cloud)     Variable Stars (photometric monitoring) - RZ LMi     Nearby Stars (astrometric monitoring) - Barnards Star

- Night session (3.4 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 -   - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 1°C (min) - CCD Temperature:  -20°C - Notes from 2021-04-30 >>    [ Local Files >> ]   -

C/2020 T2 (Palomar) - Comet

C/2020 T2 (Palomar) - 2021-04-30 (passing through Canes Venatici) Sun Distance 2.22 AU (approaching) Earth Distance 1.42 AU (212.6 million km)		C/2020 T2 (Palomar) - 2021-04-30, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -23.16 arcsec/hr, Dec -27.15 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 4 x 45s exposure (average combine), 3x3 binning, C Filter 2021-04-30 23:11 UT (#893029-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, log scale, cropped) 4 x 45s exposure (average combine), 3x3 binning, C Filter 2021-04-30 23:11 UT (#893029-32) 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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NGC 3310 - Spiral Galaxy  (Herschel IV-60) with Type II Supernova 2021gmj

NGC 3310 / Herschel IV-60 with SN2021gmj (Ursa Major) SN 2021gmj (Type: II) discovered 2021/03/20.320 UT by DLT40 Alias: ZTF21aaqgmjt, ATLAS21izq Discovery Magnitude 15.98 (r-Sloan Filter)  ( Rochester Supernova site |  Gianluca Masi image | TNS 2021gmj )

NGC 3310 with SN 2021gmj - 2021-05-01 (T+41.7d) Image below (2021-05-01.001) was taken 41.7 days after discovery of 2021gmj Position of SN (faint) is indicated by white cross-hairs Estimated Magnitude +14.7 (Clear Filter)

CCD Image (100% size, log scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-05-01 00:09 UT (#893044-48) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021gmj (NGC 3310) on Supernovae 2021 Page >>

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NGC 4165 - Spiral Galaxy with Type II Supernova 2021gno

NGC 4165 with SN2021gno (Virgo) SN 2021gno (Type: II) discovered 2021/03/20.235 UT by ZTF Alias: ZTF21aaqhhfu Discovery Magnitude 18.20 (r-ZTF Filter)  ( Rochester Supernova site |  Claudio Balcon image | Giancarlo Cortini image | TNS 2021gno )

NGC 4165 with SN 2021gno - 2021-04-30 (T+41.7d) Image below (2021-04-30.915) was taken 41.7 days after discovery of 2021gno Position of SN (very faint) is shown by white cross hairs Estimated Magnitude +18.0 (Clear Filter)

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-04-30 22:07 UT (#893010-14) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021gno (NGC 4165) on Supernovae 2021 Page >>

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UGCA 271 - Irregular Galaxy (PGC 38481)

UGCA 271 (Canes Venatici) Alias: PGC 38481 [ UGCA Galaxies , Irregular Galaxies ]

CCD Image (50% size, square root scale) 3 x 300s exposure (average combine), 3x3 binning, C Filter 2021-05-01 00:31 UT (#893052-54) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 271 - Detail UGCA 271 is faint but distinct

CCD Image (125% size, square root scale, cropped) Image details as above

Negative CCD Image (125% size, square root scale, cropped) Image details as above

UGCA 271 - Earlier Image (Jan 2021) UGCA 271 is faint but just visible

CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-01-19 05:24 UT (#852181-84) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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UGC 8426 - Spiral Galaxy with Transient AT 2021knq

UGC 8426 with AT 2021knq (Canes Venatici) AT 2021knq (Type: unk) discovered 2021/04/26.034 UT by MASTER Alias: MASTER OT J132415.53+312019.0 Discovery Magnitude 17.2  ( Rochester Supernova site | TNS 2021knq )

UGC 8426 with AT 2021knq - 2021-04-30 (T+4.9d) Image below (2021-04-30.949) was taken 4.9 days after discovery of 2021knq Reported position of transient (faint) is shown by white cross-hairs Estimated Magnitude +17.8 (Clear Filter)

Annotated CCD Image  (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-04-30 22:53 UT (#893022-25) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021knq (UGC 8426) on Transients 2021 Page >>

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