David's Astronomy Pages
Images - Session 1326 (2025-05-15)

Objects Session Notes
Bullet 29P/Schwassmann-Wachmann - Comet
   
Bullet AT 2024xpy - Type BL Transient
Bullet AT 2025kej - CV Type Transient
   
Bullet 2MFGC 13744 - Galaxy with Type II Supernova 2024afyu
   
Bullet NGC 2744 - Spiral Galaxy with Type Ic Supernova 2025oq
   
Bullet UGC 5695 - Spiral Galaxy with Type II Supernova 2025cfc
Bullet UGC 10058 - Spiral Galaxy with Type II Supernova 2025gvs
   
  - UGC 12131 w/SN2025jyl attempt failed (due to poor sky quality)
   
Bullet Variable Stars (photometric monitoring)
- T CrB, BL Lac
   
Bullet Nearby Stars (astrometric monitoring)
- None
   
- Attempted all-night session (3.3 hr)
   
- 12" LX200 + ST-10XME for imaging
- TS 80mm APO + ZWO ASI178MC for guiding & imaging
- Ambient Temperature : 6°C (min)
- CCD Temperature: -15°/-20°C
- Notes from 2025-05-15 >>
   
-

   

Observing Result

Image

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29P/Schwassmann-Wachmann - Comet

29P/Schwassmann-Wachmann - 2025-05-15
(passing through Leo)

Sun Distance 6.28 AU (receeding slowly)
Earth Distance 6.22 AU (930.8 million km)
A stellar like object is visible at the forecast position of the comet
but there is no star object at this location in Aladin.
It would seem that the comet is having a new outburst

Measured Magnitude +14.10 (Clear Filter)
   29P/Schwassmann-Wachmann - 2025-05-15 Detail
Autoguided on offset star using PHD2 with Lock Shift
set at the comet's rate of motion
(Ra 9.01 arcsec/hr, Dec -3.20 arcsec/hr)
Image   Image
Annotated CCD Image (50% size, square root scale)
8 x 90s exposure (average combine), 3x3 binning, Clear Filter
2025-05-15 23:07 UT (#1326014-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  Annotated CCD Image (125% size, square root scale, cropped)
Image details as left
     
29P/Schwassmann-Wachmann - Previous Image, 2025-05-01
(passing through Leo)

Sun Distance 6.28 AU (receeding slowly)
Earth Distance 6.00 AU (897.4 million km)
   29P/Schwassmann-Wachmann - Previous Image, 2025-05-01 Detail
Autoguided on offset star using PHD2 with Lock Shift
set at the comet's rate of motion
(Ra 4.07 arcsec/hr, Dec -1.56 arcsec/hr)
Image   Image
Annotated CCD Image (50% size, square root scale)
6 x 90s exposure (average combine), 3x3 binning, Clear Filter
2025-05-02 00:00 UT (#1319010-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  Annotated CCD Image (125% size, square root scale, cropped)
Image details as left
     
Images of 29P/Schwassmann-Wachmann on Comets 2023 Page >>    
Images of 29P/Schwassmann-Wachmann on Comets 2024 Page >>    
Images of 29P/Schwassmann-Wachmann on Comets 2025 Page >>    

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AT 2024xpy - Type BL Transient

AT 2024xpy (Hercules)
AT 2024xpy (Type: BL) discovered 2024-10-04.838 UT by Gaia
Alias: Gaia24cvy
Alerting Magnitude 16.17 (G-Gaia Filter)
vs Historic Magnitude 17.28 +/- 0.29
Brightening in known BL Lac type object (2FGL J1844.3+1548)
Normal Magnitude 17.0 to 18.0
 ( TNS 2024xpy | Gaia24cvy | Simbad 2FGL J1844.3+1548 )
 
AT 2024xpy - 2025-05-16 (T+223.2d)
Image below (2025-05-16.024) was taken 223.2 days after discovery of 2024xpy
Position of earlier transient (faint, fading) is shown by white cross-hairs 
Measured Magnitude +16.29 (Clear Filter)

Image

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-05-16 00:43 UT (#1326054-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of AT 2024xpy on Transients 2024 Page >>

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AT 2025kej - CV Type Transient

AT 2025kej (Lyra)
AT 2025kej (Type: CV) discovered 2025-05-07.765 UT by XOSS
Alias: EAST25J001, TCP J18150814+4121534
Discovery Magnitude 14.54 (Clear Filter)
 ( TNS 2025kej )

AT 2025kej - 2025-05-16 (T+8.3d)
Image below (2025-05-16.067) was taken 8.3 days after discovery of 2025kej
Position of reported transient (barely visible) is shown by white cross-hairs 
Poor quality inage (poor sky transparency, single frame)
Limiting Magnitude +16.0 (approx)

Image

Annotated CCD Image (100% size, linear scale, cropped)
90s exposure (single frame), 3x3 binning, Clear Filter
2025-05-16 01:37 UT (#1326073)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of AT 2025kej on Transients 2025 Page >>

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2MFGC 13744 - Galaxy with Type II Supernova 2024afyu

2MFGC 13744 with SN 2024afyu (Ophiuchus)
SN 2024afyu (Type: II) discovered 2024-12-29.573 UT by ZTF
using Palomar 1.2m Oschin Telescope
Alias: ZTF24abzxalv
Discovery Magnitude 15.63 (r-ZTF Filter)
 ( TNS 2024afyu )

2MFGC 13744 with SN 2024afyu - 2025-05-16 (T+137.4d)
Image below (2025-05-16.010) was taken 137.4 days after discovery of 2024afyu
Position of reported supernova (distinct, fading) is shown by white cross-hairs 
Measured Magnitude +15.81 (Clear Filter)

Image

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-05-16 00:22 UT (#1326047-51)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2024afyu (in 2MFGC 13744) on Supernova 2024 Page >>

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NGC 2744 - Spiral Galaxy with Type Ic Supernova 2025oq

NGC 2744 with SN 2025oq (Cancer)
SN 2025oq (Type: Ic) discovered 2025-01-17.024 UT by ATLAS
Alias: GOTO25io, ZTF25aaccmjq, ATLAS25als, BGEM J090438.41+182800.2
Discovery Magnitude 18.73 (L-GOTO Filter)
vs Prior Non-Detection Limiting Magnitude 18.6
 ( TNS 2024xav )

 
NGC 2744 with SN 2025oq - 2025-05-15 (T+118.9d)
Image below (2025-05-15.949) was taken 118.9 days after discovery of 2025oq
Position of reported supernova (faint) is shown by white cross-hairs 
Poor quality image (poor sky quality, single frame)

Image

Annotated CCD Image (150% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2025-05-15 22:47 UT (#1326009)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
NGC 2744 with SN 2025oq - Earlier Image, 2025-04-22 (T+96.0d)
Image below (2025-04-22.981) was taken 96.0 days after discovery of 2025oq
Position of reported supernova (faint) is shown by white cross-hairs 
Estimated Magnitude +17.1 (Clear Filter)

Image

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-22 23:41 UT (#1316024-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2025oq (in NGC 2744) on Supernovae 2025 Page >>

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UGC 5695 - Spiral Galaxy with Type II Supernova 2025cfc

UGC 5695 with SN 2025cfc (Leo)
SN 2025cfc (Type: II) discovered 2025-02-20.905 UT by GOTO
Using GOTO-North Telescope
Alias: GOTO25anu
Discovery Magnitude 17.75 (L-GOTO Filter)
vs Prior Non-Detection Limiting Magnitude 19.3
 ( TNS 2025cfc )

UGC 5695 with SN 2025cfc - 2025-05-15 (T+84.1d)
Image below (2025-05-15.970) was taken 84.1 days after discovery of 2025cfc
Position of reported supernova (faint, fading) is shown by white cross-hairs 
Measured Magnitude +16.56 (Clear Filter)

Image

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-05-15 23:24 UT (#1326024-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2025cfc (in UGC 5695) on Supernova 2025 Page >>

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UGC 10058 - Spiral Galaxy with Type II Supernova 2025gvs

UGC 10058 with SN 2025gvs (Corona Borealis)
SN 2025gvs (Type: II) discovered 2025-04-05.502 UT by ATLAS
Alias: ATLAS25dpm
Discovery magnitude 17.59 (cyan-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 17.7
 ( TNS 2025gvs)
  
UGC 10058 with SN 2025gvs - 2025-05-15 (T+40.5d)
Image below (2025-05-15.989) was taken 40.5 days after discovery of 2025gvs
Position of reported supernova (distinct) is shown by white cross-hairs
Measured Magnitude +15.47 (Clear Filter)
Image 
Annotated CCD Image (175% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-05-15 23:51 UT (#1326033-36)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Images of SN 2025gvs (in UGC 10058) on Supernova 2025 Page >>

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