David's Astronomy Pages CCD Images - Session 918 (2021-09-29)

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C/2019 L3 (ATLAS) - Comet     Nova Cas 2021 - Nova (Gaia21bpe, AT2021hkn)     AT 2021bpy - Transient (Type Unknown) AT 2021koz - Type QSO? Transient      Kn 61 - Planetary Nebula (Attempt)     M31 - Spiral Galaxy with Transient AT 2021zdh M33 - Spiral Galaxy with Transient AT 2021wcf     NGC 9 - Spiral Galaxy with Type Ib Supernova 2021zju NGC 514 - Spiral Galaxy with Type Ia Supernova 2020uxz NGC 940 - Spiral Galaxy with Type Ia Supernova 2021vtl NGC 1166 - Spiral Galaxy with Type II Supernova 2021zby NGC 6184 - Spiral Galaxy with Type Ia Supernova 2021wkv NGC 6500 - Spiral Galaxy with Type Ia Supernova 2021wuf      PGC 3792 - Local Group Galaxy (Pisces Dwarf), 3.0 mly  (Attempt) SN 2021yal - Type Ia-91T Supernova in PGC 1155307  (Attempt)     Variable Stars (photometric monitoring) - RX And, U And, CI Cyg, SS Cyg, RR Lyr      Nearby Stars (astrometric monitoring) - HH And, 61 Cyg, Groombridge 34, EV Lac, Teegardens Star

- Full night Session (8.8 hours). - Clear skies all night but poor seeing and moonlit - Main aims of the session were to acquire a selection of targets including  Comet 67P/Churyumov-Gerasimenko - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 12°C (min) - CCD Temperature:  -10°C - Notes from 2021-09-29 >>    [ Local Files >> ]   -

C/2019 L3 (ATLAS) - Comet

C/2019 L3 (ATLAS) - 2021-09-30 (passing through Auriga) Sun Distance 3.67 AU (approaching) Earth Distance 3.71 AU (554.6 million km)		C/2019 L3 (ATLAS) - 2021-09-30, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 32.84 arcsec/hr, Dec -12.32 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 2 x 45s exposure (average combine), 3x3 binning, C Filter 2021-09-30 02:08 UT (#918239-40) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, log scale, cropped) 7 x 45s exposure (average combine), 3x3 binning, C Filter 2021-09-30 02:11 UT (#918239-45) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2019 L3 (ATLAS) on Comets 2021 Page >>

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Nova Cas 2021 - Nova (V1405 Cas)

Nova Cas 2021 (Cassiopeia) Nova in Cassiopeia discovered 2021-03-18.4236,  by Yuji Nakamura (Japan) Magnitude at discovery +9.6 (unfiltered CCD) AT2021hkn (Type: Nova) reported by 2021/03/30.055 UT by Gaia Alias: Gaia21bpe, AT2021hkn, V1405 Cas

Nova Cas 2021 / AT2021hkn - 2021-09-29 (T+195.5d) Image below (2021-09-29.948) was taken 195.5 days after after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +8.02 Note: star object is saturated and shows some blooming, mag is probably underestimated (linked with Detection Threshold = 50)

CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2021-09-29 22:47 UT (#918123-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 (V1405 Cas) Spectra - 2021-09-29 (T+195.5d)

Spectra produced in AstroMain using Image taken with Star Analyser 200 5 x 30s exposure (average combine), 2x2 binning, S Filter 2021-09-29 22:50 UT (#918128-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Cas 2021 on Novae Page >>

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AT 2021bpy - Transient (Type Unknown)

AT 2021bpy (Andromeda) AT2021bpy (Type: unk) discovered 2021/02/03.162 UT by ZTF Alias: ZTF19aaywash Discovery Magnitude 14.19 (r-ZTF Filter)  ( Rochester Supernova site | Discovery Image  ) | ZTF19aaywash ) ( TNS 2021bpy )   (see https://lasair.roe.ac.uk/lasair/static/ztf/stamps/jpg/1494/candid1494161754615015005.jpg )

AT 2021bpy - 2021-09-30 (T+238.9d) Image below (2021-09-30.074) was taken 238.9 days after discovery of 2021bpy Previously reported transient position (now faded & no longer visible) is shown approximately by white cross hairs.

Annotated CCD Image  (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-30 01:54 UT (#918232-36) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021bpy on Transients 2021 Page >>

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AT 2021koz - Type QSO? Transient

AT 2021koz (Aquarius) AT 2021koz (Type: QSO?) discovered 2021/04/28.220 UT by MASTER Alias: MASTER OT J211634.43-015312.7 Discovery Magnitude 14.19 (r-ZTF Filter)  ( Rochester Supernova site | Discovery Image  ) | ZTF19aaywash ) ( TNS 2021koz )   (see https://lasair.roe.ac.uk/lasair/static/ztf/stamps/jpg/1494/candid1494161754615015005.jpg )

AT 2021koz - 2021-09-29 (T+154.6d) Image below (2021-09-29.859) was taken 154.6 days after discovery of 2021koz Position of earlier transient position (now faded & no longer visible) is shown approximately by white cross hairs.

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-29 20:46 UT (#918040-44) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT2021koz on Transients 2021 Page >>

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Kn 61 - Planetary Nebula (attempt)

Kn 61 / Soccer Ball Nebula, SDSSJ192138.93+381857.2 (Lyra) Ast. Now DeepSky Challenge Object, Sep 2012 Location of Kn 61 is shown by white circle. The relatively bright star on edge of Kn 61 circle is GSC 3134:1188 (mag +10.45)

Annotated CCD Image (100% size, square root scale, cropped) 6 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-29 21:41 UT (#918052-59) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Kn 61 (attempt) No sign of Pl.Neb (18 min total exposure time)

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

Kn 61 (attempt) - Earlier Image (Aug 2018) No sign of the faint planetary nebula in this image (10 min total exposure time)

CCD Image (100% size, linear scale, cropped) 5 x 120s exposure (average combine), 3x3 binning, C Filter 2019-08-22 21:16 UT (#683003-09) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image (100% size, cropped) Image details as above

Reference Image : Long Exposure LOIII-RGB-Composite Images of Kn61 see http://www.capella-observatory.com/ImageHTMLs/PNs/Kn61.htm

Image modifications : resize, negative, gamma, grey scale

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M31 - Spiral Galaxy with Transient AT 2021zdh (Attempt)

M31 with AT 2021zdh (Andromeda) AT 2021zdh (Type: unk) discovered 2021-09-18.608 UT by XOSS Alias: XM58MZ, PNV J00424123+4114322 Discovery Magnitude 18.4 (Clear Filter) vs Prior Non-Detection Limiting Magnitude 19.0  (Rochester Supernova site | Rochester EGN Page | http://xjltp.china-vo.org/xm58mz.html) ( TNS 2021zdh )

M31 with AT 2021zdh - 2021-09-30 (T+11.4d) Image below (2021-09-30.044) was taken 11.4 days after discovery of 2021zdh Position of reported transient (not visible) is shown by white cross-hair Background near to M31 nucleus is too bright to show the transient which in any case may have faded since its discovery

Annotated CCD Image  (150% size, log scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-30 01:11 UT (#918201-05) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT2021zdh (in M31) on Transients 2021 Page >>

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M33 - Spiral Galaxy with Transient AT 2021wcf

M33 with AT 2021wcf (Triangulum) AT 2021wcf (Type: unk) discovered 2021-07-20.704 UT by Koichi Itagaki Alias: Gaia21duh, Nova M33 2021-07a?, TCP J01333854+3035364  (Rochester Supernova site | Rochester EGN Page |  Nick James image | AT 2021wcf is a blue transient / possibly a nova [ Gaia21duh ]

M33 with AT 2021wcf - 2021-09-30 (T+71.3d) Image below (2021-09-30.003) was taken 71.3 days after discovery of 2021wcf Position of earlier transient (no longer visible) is shown by white cross-hairs

Annotated CCD Image  (200% size, square root scale, cropped 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-30 00:14 UT (#918167-71) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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NGC 9 - Spiral Galaxy with Type Ib Supernova 2021zju

NGC 9 with SN 2021zju (Pegasus) SN 2021zju (Type: Ib) discovered 2021-09-24.483 UT by ATLAS Alias: ATLAS21bjbm, ZTF21acdxhuv  (Rochester Supernova site | Enrico Prosperi image )

NGC 9 with SN 2021zju - 2021-09-29 (T+5.5d) Image below (2021-09-29.962) was taken 5.5 days after discovery of 2021zju Position of SN (faint) is shown by white cross-hairs Estimated Magnitude +16.8 (Clear Filter)

Annotated CCD Image  (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-29 23:12 UT (#918142-45) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021zju (NGC 9) on Supernovae 2021 Page >>

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NGC 514 - Spiral Galaxy with Type Ia Supernova 2020uxz

NGC 514 (Pisces) Spiral Galaxy with Type Ia Supernova [ Supernovae ] SN 2020uxz (Type 1a), discovered 2020/10/05.573 by Koichi Itagaki  (Rochester Supernova site | Discovery Image | )

NGC 514 with SN 2020uxz - 2021-09-29 (T+359.4d) Image below (2021-09-29.990) was taken 359.4 days after discovery of 2020uxz Position of earlier SN (faded & no longer visible) is shown by white cross hairs.

Annotated CCD Image  (100% size, square root scale, cropped) 5 x 120s exposure (average combine), 3x3 binning, C Filter 2021-09-29 23:52 UT (#918158-62) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2020uxz (NGC 514) on Supernovae 2020 Page >>

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NGC 940 - Spiral Galaxy with Type Ia Supernova 2021vtl

NGC 940 with SN 2021vtl (Triangulum) SN 2021vtl (Type: Ia) discovered 2021-08-11.930 UT by XOSS Alias: PSP21D, Gaia21duk, PSN J02292803+3138385  (Rochester Supernova site )

NGC 940 with SN 2021vtl - 2021-09-30 (T+49.1d) Image below (2021-09-30.024) was taken 49.1 days after discovery of 2021vtl SN (faint) is shown by white cross-hairs Estimated Magnitude +16.9 (Clear Filter)

Annotated CCD Image  (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-30 00:43 UT (#918184-88) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021vtl (NGC 940) on Supernovae 2021 Page >>

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NGC 1166 - Spiral Galaxy with Type II Supernova 2021zby

NGC 1166 with SN 2021zby (Aries) SN 2021zby (Type: II) discovered 2021-09-17.453 UT by ATLAS Alias: ATLAS21bixf  (Rochester Supernova site | Enrico Prosperi image )

NGC 1166 with SN 2021zby - 2021-10-04 (T+16.7d) Image below (2021-10-04.114) was taken 16.7 days after discovery of 2021zby Position of SN (faint) is shown by white cross-hairs Estimated Magnitude +16.8 (Clear Filter)

Annotated CCD Image  (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-10-04 02:52 UT (#920173-77) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021zby (NGC 1166) on Supernovae 2021 Page >>

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NGC 6184 - Spiral Galaxy with Type Ia Supernova 2021wkv

NGC 6184 with SN 2021wkv (Hercules) SN 2021wkv (Type: Ia, zhost=0.027329) discovered 2021/08/20.277 UT by ATLAS Alias: ATLAS21bgqy.  Magnitude +18.2 at discovery  (Rochester Supernova site )

NGC 6184 with SN 2021wkv - 2021-09-29 (T+40.6d) Image below (2021-09-29.883) was taken 40.6 days after discovery of 2021wkv Position of SN (faint) is shown by white cross-hairs. Estimated  Magnitude +16.9 (Clear Filter)

Annotated CCD Image  (125% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-09-29 21:11 UT (#918048) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021wkv (NGC 6184) on Supernovae 2021 Page >>

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NGC 6500 - Spiral Galaxy with Type Ia Supernova 2021wuf

NGC 6500 with SN 2021wuf (Hercules) SN 2021wuf (Type: Ia) discovered 2021-08-23.372 UT by ATLAS Alias: ATLAS21bgsc  (Rochester Supernova site | Mantero Andrea image )

NGC 6500 with SN 2021wuf - 2021-09-29 (T+37.5d) Image below (2021-09-29.833) was taken 37.5 days after discovery of 2021wuf Position of SN (distinct) is shown by white cross-hairs. Measured Magnitude +15.25 (Clear Filter)

Annotated CCD Image  (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-29 20:08 UT (#918012-16) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021wuf (NGC 6500) on Supernovae 2021 Page >>

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PGC 3792 - Local Group Galaxy (Pisces Dwarf), 3.0 mly  (attempted observation)

PGC 3792 (Pisces) [ Local Group Gaaxies ] 20 min total exposure No trace of  PGC 3792  in image below

CCD Image (70% size, square root scale) 4 x 300s exposure (average combine), 3x3 binning, C Filter 2021-09-30 03:07 UT (#918277-80) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

PGC 3792 - Earlier Image (Jan 2021) 25 min total exposure No trace of  PGC 3792  in image below Despite longer exposure (25 min vs 9 min) poor sky transparency resulted in a poorer quality image than picture taken in Dec 2020.

CCD Image (70% size, square root scale) 5 x 300s exposure (average combine), 3x3 binning, C Filter 2021-01-08 20:05 UT (#847093-97) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

PGC 3792 - Earlier Image (Dec 2020) 9 min total exposure Expected location of PGC 3792 shown by white circle Trace of some objects are just visible within circle and these might be part of the LG galaxy

CCD Image (70% size, square root scale) 3 x 180s exposure (summed), 3x3 binning, C Filter 2020-12-20 22:06 UT (#840107-11) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

PGC 3792 - Earlier Image (2012) Expected location of PGC 3792 shown by white circle

Annotated CCD Image (50% size) 5 x 90s exposure (average combine), 3x3 binning, C Filter  2012-11-02  22:05 hUT (#520203-07) 12" LX200R  (at f/9.7) + ST-10XME

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SN 2021yal - Type Ia-91T Supernova in PGC 1155307 (Attempt)

PGC 1155307 with SN 2021yal (Taurus) SN 2021yal (Type: Ia-91T) discovered 2021-09-05.537 UT by ATLAS Alias: ATLAS21bhuh Discovery Magnitude 16.92 (cyan-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.46  (Rochester Supernova site | Mantero Andrea image ) ( TNS 2021yal )

PGC 1155307 - Galaxy PGC 1155307 (catalog mag +16.2) with adjacent galaxies PGC 1154706 (catalog mag +16.8), PGC 1154123 (catalog mag +17.2) Bright star in FOV is HD 21053  (mag +9.3)

Annotated CCD Image  (100% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-30 02:37 UT (#918270-71) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

SN 2021yal - 2021-09-30 (T+24.6d) Image below (2021-09-30.107) was taken 24.6 days after discovery of 2021yal Position of SN (not visible) is shown by white cross-hairs. Non-Detection Limitig Magnitude +18.0 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-30 02:37 UT (#918270-71) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021yal (in PGC 1155307) on Supernovae 2021 Page >>

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