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

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

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)
Image   Image
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
Image
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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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)
Image
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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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)
Image
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)
Image
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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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
Discovery Magnitude 12.25 (G-Gaia Filter)
vs Historic Magnitude 13.75 +/- 0.67 SD
Brightening in known YSO, ESO-HA 1481 (4 mags in 3 years)
 [ TNS 2021ckv | Gaia21arx ]
 ( Light Curve 2012-2018, Reipurth et al )
 
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)
Image
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
 
Images of AT 2021ckv / PR Ori on Transients 2021 Page >>  

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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 - 2021-09-28 (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
Image 
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
Image 
Annotated CCD Image  (150% size, log scale)
Image details above
 
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-hairs
Background near to M31 nucleus is too bright to show the transient
which in any case may have faded since its discovery
Image 
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
 
 

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M33 - Spiral Galaxy

M33  (Triangulum)
Southern portion of M33 spiral galaxy
Image 
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
 
Image 
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
Image 
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
Image 
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
Discovery Magnitude +17.7 (Clear Filter)
vs Prior Non-Detection Limiting Magnitude 18.0
 (Rochester Supernova site | Rochester EGN Page |  TNS 2021yul )
 
Nova's reported position is shown by white circle
Image 
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
Image 
Annotated CCD Image  (100% size, square root scale, cropped
Image details above
 
Images of AT 2021yul (in M110) on Transients 2021 Page >>     

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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 - 2021-09-27 (T+3.3d)
Image below (2021-09-27.811) was taken 3.3 days after discovery of 2021zju
Position of SN (faint) is shown by white cross-hairs
Image
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 848 - Spiral Galaxy

NGC 848 (Cetus)
Alias: Galaxy near to Hickson 16
Deep Sky Challenge Object, Dec 2020
  [ Deep Sky Challanges (Ast.Now) ]
Image
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
Image
Annotated CCD Image  (125% size, square root scale, cropped)
Image details as above
Image
Negative CCD Image (125% size, square root scale, cropped)
Image details as 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
Image
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
Image
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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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)
Image
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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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)
Image
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
Image
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
Image
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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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)
Image
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
Image
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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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
Image
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
Image
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
 
Image
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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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
Image
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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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
Image
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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