David's Astronomy Pages CCD Images - Session 943 (2021-12-17)

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AT2021bpy - Transient (Type Unknown) UGC 1971 - Galaxy with Type II Supernova 2021afkk Nova Per 2020 - Nova (V1112 Per, AT2020abap) AT2021aduu - Type CV Transient UGC 2528 - Spiral Galaxy with Type IIb Supernova 2020adnx 132P/Helin-Roman-Alu - Comet C/2017 K2 (PANSTARRS) - Comet IC 992 - Spiral Galaxy with Type Ic Supernova 2021dwg      Variable Stars (photometric monitoring) - AM CVn, AM Her      Nearby Stars (astrometric monitoring) - HH And, CN Leo, Teegardens Star

- Evening session 5.6 hours -   - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: -3°C (min) - CCD Temperature:  -25°C - Notes from 2021-12-17 >>    [ Local Files >> ]

AT2021bpy - Transient (Type Unknown)

AT2021bpy (Andromeda) AT2021bpy (Type: unk) discovered 2021/02/03.162 UT by ZTF Alias: ZTF19aaywash  ( Rochester Supernova site | Discovery Image  ) | ZTF19aaywash |   (see https://lasair.roe.ac.uk/lasair/static/ztf/stamps/jpg/1494/candid1494161754615015005.jpg )

Bright star adjacent to reported transient position is  SAO 38097 (mag +8.57)

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-17 18:45 UT (#943003-07) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT2021bpy - 2021-12-17 (T+317.6d) Image below (2021-12-17.774) was taken 317.6 days after discovery of 2021bpy Previously reported transient position (now faded) is shown approximately by white cross hairs.  Measured Magnitude of offset star is +15.3

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-17 18:45 UT (#943003-07) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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UGC 1971 - Galaxy with Type II Supernova 2021afkk

UGC 1971 with SN 2021afkk (Triangulum) SN 2021afkk (Type: II) discovered 2021-11-25.371 UT by ATLAS Alias: ATLAS21bmvp. Magnitude +18.2 at discovery.   Distance 196 Mly (60 Mpc)  (Rochester Supernova site | Enrico Prosperi image )

UGC 1971 with SN 2021afkk - 2021-12-17 (T+22.4d) Image below (2021-12-17.815) was taken 22.4 days after discovery of 2021afkk Supernova reported position is shown by white cross-hairs Measured magnitude +15.0 (SN + Galaxy Nucleus)  - unchanged since T+3.7d Poor quality image (bright sky background)

Annotated CCD Image  (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-17 19:43 UT (#943037-39) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021afkk (UGC 1971) on Supernovae 2021 Page >>

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Nova Per 2020 - Nova (V1112 Per, AT2020abap)

Nova Per 2020 (Perseus) Nova in Perseus discovered 2020/11/25.807 [ Novae ] Nova Per 2020 discovered independently by Seiji Ueda and Stanislav Korotkiy et al AT2020abap (Type: CV) reported 2020/11/27.230 UT by PGIR Alias: N Per 2020 , PGIR20fbf, TCP J04291888+4354233, TCP J04291884+4354232, V1112 Per

Nova Per 2020 - 2021-12-17 (T+387.0d) Image below (2021-12-17.835) was taken 387.0 days after discovery of nova Nova is shown by white cross hairs.  Measured magnitude +15.9 (fading)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 90s exposure (average combine), 3x3 binning, C Filter 2021-12-17 20:06 UT (#943060-64) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Per 2020 on Novae Page >>

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AT2021aduu - Type CV Transient

AT2021aduu (Cygnus) AT2021aduu (Type: CV) discovered 2021-11-05.930 UT by Gaia Alias: Gaia21fba [ Gaia21fba  ]  Gaia alert triggered by 0.3 mag rise in brightness (from +15.55 to +15.21)

AT2021aduu - 2021-12-17 (T+41.9d) Image below (2021-12-17.800) was taken 41.9 days after discovery of 2021aduu AT2021aduu is shown by white cross-hairs Measured magnitude +14.35

Annotated CCD Image (150% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-17 19:15 UT (#943019-23) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT2021aduu - Earlier Image, 2021-11-15 (T+9.9d) Image below (2021-11-15.818) was taken 9.9 days after discovery of 2021aduu AT2021aduu is shown by white cross-hairs Measured magnitude +14.4

Annotated CCD Image (150% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-15 19:42 UT (#933005-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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UGC 2528 - Spiral Galaxy with Type IIb Supernova 2020adnx

UGC 2528 with SN 2020adnx (Perseus) Spiral Galaxy with Type IIb Supernova  [ Supernovae ] SN 2020adnx (Type IIb,  zhost=0.021001)  discovered 2020-12-24.859 UT by MASTER Alias: MASTER OT J030555.49+413631.1, ATLAS20bjhy, Gaia20fxw  ( Rochester Supernova site | Gianpiero Locatelli image )

UGC 2528 with SN 2020adnx - 2021-12-17 (T+358.0d) Image below (2021-12-17.842) was taken 358.0 days after discovery of 2020adnx Earlier position of SN (no longer visible) is shown by white cross hairs.  Poor quality image due to bright uneven background sky

CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-17 20:22 UT (#943067-71) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2020adnx (UGC 2528) on Supernovae 2020 Page >>

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132P/Helin-Roman-Alu - Comet

132P/Helin-Roman-Alu (passing through Cetus) Sun Distance 1.73 AU (receeding) Earth Distance 1.11 AU (165.4 million km)		132P/Helin-Roman-Alu - 2021-12-17, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 60.08 arcsec/hr, Dec 25.65 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-17 20:42 UT (#943076-78) 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) 7 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-17 20:44 UT (#943076-82) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 132P/Helin-Roman-Alu on Comets 2021 Page >>

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C/2017 K2 (PANSTARRS) - Comet

C/2017 K2 (PANSTARRS) (passing through Hercules) Sun Distance 4.52 AU (approaching) Earth Distance 5.25 AU (786.0 million km)		C/2017 K2 (PANSTARRS) - 2021-12-18, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 29.84 arcsec/hr, Dec -14.29 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-18 06:23 UT (#943115-17) 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) 9 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-18 06:23 UT (#943112-20) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C2017 K2 (PANSTARRS) on Comets 2021 Page >>

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IC 992 - Spiral Galaxy with Type Ic Supernova 2021dwg

IC 992 with SN2021dwg (Virgo) SN 2021dwg (Type: Ic) discovered 2021/02/27.420 UT by ZTF Alias: ZTF21aannoix Magnitude +18.44 at discovery  (Rochester Supernova site |  TNS SN 2021dwg | ZTF21aannoix Notes) [ Supernovae 2021 ]

IC 992 with SN2021dwg - 2021-12-18 (T+293.9d) Image below (2021-12-18.283) was taken 293.9 days after discovery of 2021dwg Position of earlier SN (no longer visible) is shown by white circle.

Annotated CCD Image  (125% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-18 06:51 UT (#943134-35) 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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