David's Astronomy Pages
CCD Images - Session 938 (2021-11-28)

Objects Session Notes
Bullet C/2019 L3 (ATLAS) - Comet
   
Bullet V0645 Cyg - Variable Star, Type YSO Transient AT2021zkf
Bullet AT 2021fmi - CV Type Transient
Bullet AT 2021aetv - Type CV Transient (Unconfirmed)
   
Bullet BL Lac - Active Galactic Nuclei
Bullet M31 - Spiral Galaxy
   
Bullet NGC 1166 - Spiral Galaxy with Type II Supernova 2021zby
Bullet NGC 2158 - Open Cluster (H VI-17)
Bullet NGC 6627 - Spiral Galaxy with Type II Supernova 2021abkm
   
Bullet UGC 1971 - Galaxy with Type II Supernova 2021afkk
   
Bullet Whiting 1 - Globular Cluster
    
Bullet Variable Stars (photometric monitoring)
- None
    
Bullet Nearby Stars (astrometric monitoring)
- None
  
   
- Evening session 6.4 hours
- Session interrupted by passing clouds/snow showers and
finally ended by cloud/high cloud at 01:34
- 12" LX200 + ST-10XME for imaging
- TS 80mm APO + ZWO ASI178MC for guiding & imaging
- Ambient Temperature: -0.5°C (min)
- CCD Temperature:  -25°C
- Notes from 2021-11-28 >>
   [ Local Files >> ]
   

C/2019 L3 (ATLAS) - Comet

C/2019 L3 (ATLAS)
(passing through Lynx)
Sun Distance 3.57 AU (approaching)
Earth Distance 2.82 AU (422.2 million km)
   C/2019 L3 (ATLAS)  - 2021-11-28, Detail
Autoguided on offset star using PHD2 with Lock Shift
set at the comet's rate of motion
(Ra -20.68 arcsec/hr, Dec -17.05 arcsec/hr)
Image   Image
Annotated CCD Image (50% size, square root scale)
3 x 45s exposure (average combine), 3x3 binning, C Filter
2021-11-28 21:01 UT (#938035-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  CCD Image (100% size, log scale, cropped)
3 x 45s exposure (average combine), 3x3 binning, C Filter
2021-11-28 21:01 UT (#938035-37)
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)  - 2021-11-28
Image
False Colour CCD Image (70% size, log scale)
3 x 45s exposure (average combine), 3x3 binning, C Filter
2021-11-28 21:01 UT (#938035-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
 

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V0645 Cyg - Variable Star, Type YSO Transient AT2021zkf

V0645 Cyg (Cygnus)
AT2021zkf (Type: YSO) discovered 2021-09-13.232 UT by Gaia
Alias: Gaia21ego, GCVS V0645 Cyg
 | Gaia21ego )
 
 V0645 Cyg /  AT2021zkf (T+76.7d)
Image 
Annotated CCD Image  (50% size, linear scale)
2 x 180s exposure (average combine), 3x3 binning, C Filter
2021-11-28 22:06 UT (#938050-51)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
 V0645 Cyg /  AT2021zkf - 2021-11-28 (T+76.7d)
Image below (2021-11-28.912) was taken 76.7 days after discovery of 2021zkf
Star is shown by white cross-hairs
Measured Magnitude +11.55
Image 
CCD Image  (100% size, linear scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, C Filter
2021-11-28 22:06 UT (#938050-51)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 

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AT2021fmi - CV Type Transient

AT2021fmi (Orion)
AT2021fmi (Type: CV) discovered 2021/03/11.011 UT by Gaia
Alias: Gaia21bhl
 (mag +16.6 at outburst in Mar 2021 vs normal mag +19.3 to + 20.5)
 | Gaia21bhl )
 
 AT2021fmi (CV) - 2021-11-28 (T+262.9d)
Image below (2021-11-28.926) was taken 262.9 days after discovery of 2021fmi
Position of earlier reported CV outburst (not visible) is shown by white cross-hairs
No object is visible at reported position and the star is presumed to
have returned to it normal brightness (mag +20)
Image 
Annotated CCD Image  (50% size, linear scale)
5 x 60s exposure (average combine), 3x3 binning, C Filter
2021-11-28 22:16 UT (#938053-57)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
 AT2021fmi (CV) - Detail
Image 
CCD Image  (125% size, linear scale, cropped)
Image details as above
 

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AT2021aetv - Type CV Transient (unconfirmed)

AT2021aetv (Pisces)
AT2021aetv (Type: CV) discovered 2021-11-12.220 UT by Robert Nelson
Alias: RHN-001, GSC 0015-0388
 
AT2021aetv - 2021-11-28 (T+16.7d)
Image below (2021-11-28.935) was taken 16.7 days after discovery of AT2021aetv

AT2021aetv is shown by white cross-hairs
Measured magnitude +11.5
vs GCS 15:388 catalog mag +11.5 and UCA/USNO2 catalog mag +11.4
Again no indication of any significant brightning. The transient is therefore again unconfirmed.
Star would seem to have returned to its normal state.
Image
Annotated CCD Image (50% size, linear scale)
2 x 60s exposure (average combine), 3x3 binning, C Filter
2021-11-28 22:29 UT (#938060-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 

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BL Lac - Active Galactic Nuclei (Outburst AT2021bag)

BL Lac (Lacerta)
Accidently targetted as AT2021bag
AT2021bag (Type BL) was an outburst of BL Lac
discovered 2021/01/21.654 UT by Gaia
Alias: Gaia21akj, BL Lac
  | Gaia21akj | [
 
AT2021bag - 2021-11-28 (T+311.2d)
Image below (2021-11-28.818) was taken 311.2 days after reported discovery 2021bag
BL Lac is shown by white cross hairs. 
Measured magnitude +13.2  (vs catalog mag of +14.5)
Object is noticeably dimmer than it was in image taken 2021-01-25 (T+4.1d)
Image
Annotated CCD Image  (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, C Filter
2021-11-28 19:41 UT (#938013)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
AT2021bag - Earlier Image, 2021-01-25 (T+4.1d)
Image below (2021-01-25.776) was taken 4.1 days after reported discovery 2021bag
BL Lac is shown by white cross hairs. 
Measured magnitude +12.1  (vs catalog mag of +14.5)
Image
Annotated CCD Image  (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, C Filter
2021-01-25 18:43 UT (#855005-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
 BL Lac on Active Galactic Nuclei Page >>

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M31 - Spiral Galaxy

M31 (Andromeda)
Accidently targetted as M31 with AT2021boa
a former Type: FeII transient (now faded) discovered 2021/02/03.580 UT by XOSS
 
Image
CCD Image  (70% size, square root scale)
180s exposure (single frame), 3x3 binning, C Filter
2021-11-28 20:19 UT (#938018)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 

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Whiting 1 - Globular Cluster

Whiting 1 (Cetus)
Discovered 2002 by Whiting, Hau & Irwin
Position of Whiting 1 shown by white circle
[ Globular Star Clusters ]
Image
Annotated CCD Image (50% size, square root scale)
5 x 60s exposure (average combine), 3x3 binning, C Filter
2021-11-28 20:46 UT (#938026-32)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
   
Whiting 1 - Detail
Image
CCD Image (100% size, square root scale, cropped)
Image details as above
   
Image
Negative CCD Image (100% size, square root scale, cropped)
Image details as above
   
Whiting 1 - Earlier Image (Aug 2019)
Some of the stars in the globular cluster are just visible
Image affected by dust mottes / bright sky background
Image
CCD Image (100% size, log scale, cropped)
7 x 60s exposure (average combine), 3x3 binning, C Filter
2019-08-26 03:30 UT (#684134-40)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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NGC 1166 - Spiral Galaxy with Type II Supernova 2021zby

NGC 1166 with SN2021zby (Aries)
SN 2021zby (Type: II) discovered 2021-09-17.453 UT by ATLAS
Alias: ATLAS21bixf
 (Rochester Supernova site | Enrico Prosperi image )
 
NGC 1166 with SN2021zby - 2021-11-28 (T+72.5d)
Image below (2021-11-28.942) was taken 72.5 days after discovery of 2021zby
Supernova (very faint) is shown by white cross-hairs
Poor quality image (poor guiding / single frame)
Image
Annotated CCD Image  (150% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, C Filter
2021-11-28 22:39 UT (#938066)
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 2158 - Open Cluster (H VI-17)

NGC 2158 / H VI-17 (Gemini)
Image
CCD Image Mosaic  (50% size)
45s exposure (single sub), 3x3 binning, C Filter
2021-11-29 00:46 UT (#938078-88)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
[ Larger image, 100% size]
 
NGC 2158 / H VI-17 - Earlier Image (Nov 2020)
Image
Part of CCD Image Mosaic  (50% size)
45s exposure (single sub), 3x3 binning, C Filter
2020-11-13 21:09 UT (#829090-120)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
[ Full Size image (including M35), 60% size ]
 
NGC 2158 / H VI-17  - Earlier Image (Oct 2020)
Image
Part of CCD Image Mosaic  (50% size)
45s exposure (single sub), 3x3 binning, C Filter
2020-10-25 03:58 UT (#821074-99)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
[ Larger image, 100% size ]

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NGC 6627 - Spiral Galaxy with Type II Supernova 2021abkm

NGC 6627 with SN2021abkm (Hercules)
SN 2021abkm (Type: II) discovered 2021-10-14.208 UT by ATLAS
Alias: ATLAS21bkcp, Gaia21ewt
Discovery Magnitude 18.15 (orange-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 19.03
Confirmed SN II
Gaia, 2021-10-26 04:19:46, Mag 18.32
Gaia, 2022-02-18 22:00:41, Mag 20.68
Gaia, 2022-03-17 17:43:09, Mag 20.87
 (Rochester Supernova site | Enrico Prosperi image )
( TNS 2021abkm | Gaia21ewt
 
 NGC 6627 with SN2021abkm - 2021-11-28 (T+45.6d)
Image below (2021-11-28.803) was taken 45.6 days after discovery of 2021abkm
Position of earlier SN (not visible) is shown by white cross-hairs
Due to low altitude & poor guiding the signal/noise ratio in the image
isn't high enough to show the faint SN which was only just visible
at time of last observation (T+40.6d)
Image 
Annotated CCD Image  (150% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, C Filter
2021-11-28 19:22 UT (#938005-06)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2021abkm (NGC 6627) on Supernovae 2021 Page >>

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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 (T+3.7d)
Image
Annotated CCD Image  (550% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, C Filter
2021-11-29 01:27 UT (#938102-06)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
UGC 1971 with SN 2021afkk - 2021-11-29 (T+3.7d)
Image below (2021-11-29.054) was taken 3.7 days after discovery of 2021afkk
Supernova (very faint) is shown by white cross-hairs
Measured magnitude +15.0 (SN + Galaxy Nucleus)
Poor quality image (poor signal/noise)
Image
Annotated CCD Image  (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, C Filter
2021-11-29 01:27 UT (#938102-06)
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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