David's Astronomy Pages CCD Images - Session 917 (2021-09-27)

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NGC 9 - Spiral Galaxy with Type Ib Supernova 2021zju NGC 6184 - Spiral Galaxy with Type Ia Supernova 2021wkv GCVS V645 Cyg - Young Stellar Object (YSO, AT 2021zkf) NGC 6500 - Spiral Galaxy with Type Ia Supernova 2021wuf SN 2021gmh - Type Ia Supernova in SDSS J223433.36+340019.1 Nova Cas 2021 - Nova (V1405 Cas) PGC 85513 - Spiral Galaxy with Transient AT 2021yvz C/2019 L3 (ATLAS) - Comet NGC 848 - Spiral Galaxy M31 - Spiral Galaxy with Transient AT 2021zdh NGC 940 - Spiral Galaxy with Type Ia Supernova 2021vtl M33 - Spiral Galaxy M33 - Spiral Galaxy with Transient AT 2021wcf M110 - Elliptical Galaxy with Nova AT 2021yul UGC 784 - Spiral Galaxy with Type Ia Supernova 2021pc NGC 1166 - Spiral Galaxy with Type II Supernova 2021zby UGC 2605 - Irregular Galaxy with Type II Supernova 2021wvw AT 2021ckv - Type YSO Transient  (GCVS PR Ori) Nova Per 2020 - Nova (V1112 Per, AT 2020abap)           Variable Stars (photometric monitoring) - RX And, U And, TT Ari, SS Cyg, BL Lac, CY Lyr, RR Lyr, FU Ori, NV Ori, GK Per      Nearby Stars (astrometric monitoring) - HH And, Groombridge 34, EV Lac

- Full night Session (9.2 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: 8°C (min) - CCD Temperature:  -10°/15°C - Notes from 2021-09-27 >>    [ Local Files >> ]   -   - Atlas V Rocket Burn 2021-09-27 >>

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 - 2021-09-27 (T+3.3d) Image below (2021-09-27.811) was taken 3.3 days after discovery of 2021zju Supernova is shown by white cross-hairs

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-27 19:38 UT (#917003-07) 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 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 - 2021-09-27 (T+38.6d) Image below (2021-09-27.839) was taken 38.6 days after discovery of 2021wkv SN position is shown by white cross-hairs. Measured mag ? (unable to resolve SN in CCDSoft/Sextractor)

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-27 20:17 UT (#917034-38) 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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GCVS V645 Cyg - Young Stellar Object (YSO, AT 2021zkf)

GCVS V645 Cyg (Cygnus) Alias: Gaia21ego The GSA web page for the Gaia21ego report this a YSO showing a gradual 1 magnitude rise in brightness over 5 years (from mag +13 to +12) Rise in brightness finally triggered the transient alert AT 2021zkf (Type: YSO) discovered 2021-09-13.232 UT by Gaia YSO is shown by white cross-hairs Measured magnitude +11.7

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-27 20:51 UT (#917047-51) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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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 - 2021-09-27 (T+35.5d) Image below (2021-09-27.876) was taken 35.5 days after discovery of 2021wuf SN position is shown by white cross-hairs. Measured mag +15.2 Image Link using Detection Threshold of 30.0

Annotated CCD Image  (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-27 21:12 UT (#917054-58) 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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SN 2021gmh - Type Ia Supernova in SDSS J223433.36+340019.1

SDSS J223433.36+340019.1 with SN 2021gmh (Pegasus) SN 2021gmh (Type: Ia) discovered 2021/03/19.536 UT by ZTF Alias: ZTF21aaqftpz  (Rochester Supernova site ) Position of SDSS Galaxy with Supernova (faint) is shown by white circle

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-27 22:31 UT (#917128-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

SN 2021gmh - 2021-09-27 (T+192.4d) Image below (2021-09-27.931) was taken 192.4 days after discovery of 2021gmh Galaxy with Supernova (faint) is shown by white cross-hairs

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-27 22:31 UT (#917128-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image  (150% size, square root scale, cropped) Image details as above

Images of SN 2021gmh (SDSS J223433.36+340019.1) on Supernovae 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) AT 2021hkn (Type: Nova) reported by 2021/03/30.055 UT by Gaia Alias: Gaia21bpe, AT 2021hkn, V1405 Cas

Nova Cas 2021 / AT 2021hkn - 2021-09-27 (T+193.5d) Image below (2021-09-27.953) was taken 193.5 days after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +7.92 Note: star object is saturated and shows some blooming, mag is probably underestimated (linked with Detection Threshold = 50)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 30s exposure (average combine), 3x3 binning, C Filter 2021-09-27 22:54 UT (#917142-46) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 (V1405 Cas) Spectra - 2021-09-27 (T+193.5d)

Spectra produced in AstroMain using Image taken with Star Analyser 200 5 x 30s exposure (average combine), 2x2 binning, S Filter 2021-09-27 22:58 UT (#917147-51) 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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PGC 85513 - Spiral Galaxy with Transient AT 2021yvz

PGC 85513 with AT 2021yvz (Pegasus) Alias: SDSS J233627.40+270215.7 AT 2021yvz (Type: unk) discovered 2021-09-14.047 UT by MASTER Alias: MASTER OT J233627.26+270219.4  (Rochester Supernova site )

PGC 85513 and Adjacent Galaxies PGC 85513 / SDSS J233627.40+270215.7 (catalog mag +17.3),  PGC 85520 (catalog mag +16.4), PGC 85508 (catalog mag +17.2) PGC 1797287 (catalog mag +17.9), PGC 1794289 (catalog mag +18.2)

Annotated CCD Image  (70% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-27 23:35 UT (#917178-82) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

PGC 85513 with AT 2021yvz - 2021-09-27 (T+13.9d) Image below (2021-09-27.976) was taken 13.9 days after discovery of 2021yvz Galaxy with Supernova (faint) is shown by white cross-hairs Measured magnitude +17.0 (galaxy + transient) Insufficient magnitude vs galaxy catalog mag to  confirm the presence of transient

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-27 23:35 UT (#917178-82) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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C/2019 L3 (ATLAS) - Comet

C/2019 L3 (ATLAS) (passing through Auriga) Sun Distance 3.68 AU Earth Distance 3.74 AU (559.4 million km)		C/2019 L3 (ATLAS)  - 2021-09-27, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 34.29 arcsec/hr, Dec -12.30 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-09-27 23:50 UT (#917186-88) 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 2021-09-27 23:52 UT (#917186-94) 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 >>

C/2019 L3 (ATLAS) Inverse Spectrum

C/2019 L3 (ATLAS)  - 2021-09-27 Glare in bottom right corner is from HIP 36163 (mag +6.66) which lies 0.62' outside of field of view

False Colour CCD Image (70% size, square root scale) 9 x 45s exposure (average combine), 3x3 binning, C Filter 2021-09-27 23:52 UT (#917186-94) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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NGC 848 - Spiral Galaxy

NGC 848 (Cetus) Alias: Galaxy near to Hickson 16 Deep Sky Challenge Object, Dec 2020   [ Deep Sky Challanges (Ast.Now) ]

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-28 00:11 UT (#917198-202) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 848 - Detail

Annotated 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

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M31 - Spiral Galaxy with Transient AT 2021zdh

M31 with AT 2021zdh (Andromeda) AT 2021zdh (Type: unk) discovered 2021-09-18.608 UT by XOSS Alias: XM58MZ, PNV J00424123+4114322  (Rochester Supernova site | Rochester EGN Page | http://xjltp.china-vo.org/xm58mz.html)

M31 with AT 2021zdh - 2021-09-28 (T+9.4d) Image below (2021-09-28.017) was taken 9.4 days after discovery of 2021zdh Transient's reported position is shown by white circle

Annotated CCD Image  (70% size, log scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-28 00:33 UT (#917205-09) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with AT 2021zdh - Detail Transient's reported position is shown by white circle 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) Image details above

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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

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-28 01:40 UT (#917241-45) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 940 with SN 2021vtl - 2021-09-28 (T+47.1d) Image below (2021-09-28.063) was taken 47.1 days after discovery of 2021vtl SN (faint) is shown by white cross-hairs

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-28 01:40 UT (#917241-45) 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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M33 - Spiral Galaxy

M33  (Triangulum) Southern portion of M33 spiral galaxy

CCD Image  (70% size, square root scale) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-28 02:19 UT (#917257-61) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image  (70% size, square root scale) Image details as above

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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  - 2021-09-28 (T+69.4d) Image below (2021-09-28.091) was taken 69.4 days after discovery of 2021wcf Position of earlier reported nova is shown by white cross-hairs After 69 days the transient has almost certainly faded into galaxy background and is no longer visible

Annotated CCD Image  (200% size, square root scale, cropped Image details above

M33 with AT 2021wcf  - Earlier Image (2021-09-01, T+42.3d) Image below (2021-09-01.001) was taken 42.3 days after discovery of 2021wcf The reported transient (faint) is shown by white cross-hairs

Annotated CCD Image  (200% size, square root scale, cropped 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-01 00:10 UT (#910065-68) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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M110 - Elliptical Galaxy with Nova AT 2021yul

M110 with AT 2021yul (Andromeda) AT 2021yul (Type: Nova) discovered 2021-09-13.740 UT by XOSS Alias: PSP21J, ZTF21acbutpl  (Rochester Supernova site | Rochester EGN Page |

Nova's reported position is shown by white circle

Annotated CCD Image  (50% size, square root scale) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-28 02:43 UT (#917265-69) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M110 with AT 2021yul  - 2021-09-28 (T+14.4d) Image below (2021-09-28.106) was taken 14.4 days after discovery of 2021yul Nova (faint) is shown by white cross-hairs

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

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UGC 784 - Spiral Galaxy with Type Ia Supernova 2021pc

UGC 784 with SN 2021pc Cetus) [ Supernovae 2021 ] SN 2021pc (Type: Ia) discovered 2021/01/07.160 UT by ZTF Magnitude +18.3 at discovery Alias: ZTF21aabpszb, Gaia21adm  (Rochester Supernova site | TNS | )

UGC 784 with SN 2021pc - 2021-09-28 (T+264.0d) Image below (2021-09-28.122) was taken 264.0 days after discovery of 2021pc No sign of earlier supernova  SN is presumed to have faded and is no longer visible

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-28 03:04 UT (#917272-76) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021pc (UGC 784) 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 - 2021-09-28 (T+10.7d) Image below (2021-09-28.144) was taken 10.7 days after discovery of 2021zby Supernova (faint) is shown by white cross-hairs Poor quality image (single frame & poor sky conditions)

Annotated CCD Image  (150% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-09-28 03:43 UT (#917292) 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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UGC 2605 - Irregular Galaxy with Type II Supernova 2021wvw

UGC 2605 with SN 2021wvw (Perseus) SN 2021wvw (Type: II, z=0.009944) discovered 2021-08-24.606 UT by PS1 Alias: PS21jnb Host Alias : PGC 12073  (Rochester Supernova site )

UGC 2605 with SN 2021wvw - 2021-09-28 (T+34.6d) Image below (2021-09-28.159) was taken 34.6 days after discovery of 2021wvw Supernova shown by white cross-hairs Measured magnitude +17.6

CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-28 03:58 UT (#917296-300) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021wvw (UGC 2605) on Supernovae 2021 Page >>

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AT 2021ckv - Type YSO Transient  (GCVS PR Ori)

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

AT 2021ckv / PR Ori - 2021-09-28 (T+231.4d) Image below (2021-09-28.181) was taken 231.4 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.1 (vs normal range of +12.2 to +13.6)

Annotated CCD Image  (50% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-09-28 04:23 UT (#917315-19) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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Nova Per 2020 - Nova (V1112 Per, AT 2020abap)

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 AT 2020abap (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 - 2021-09-28 (T+306.3d) Image below (2021-09-28.078) was taken 306.3 days after discovery of nova Nova is shown by white cross hairs.  Measured magnitude +15.4 (flat / falling slowly)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 90s exposure (average combine), 3x3 binning, C Filter 2021-09-28 01:58 UT (#917249-52) 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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