David's Astronomy Pages
 Images - Session 1347 (2025-08-12)

 Previous Imaging Session
Images
(S1346)		   Home
Images
Main		   Home
Home
Page		   Next Imaging Session
Images
(S1348)		  
Objects Session Notes
Bullet AT 2023cuz - Type YSO Transient, UY Aur
   
Bullet IC 4408 - Spiral Galaxy with Type Ia Supernova 2025kfm  (non-detection)
Bullet M31 - Spiral Galaxy with Transient AT 2025etj  (non-detection)
   
Bullet NGC 3938 - Spiral Galaxy with Unconfirmed Transient AT 2025naw   (non-detection)
   
  - NGC 5957 w/SN2025fvw attempt failed (due to cloud/bad guiding)
   
Bullet Variable Stars (photometric monitoring)
- T CrB, BL Lac, Z And
   
  - RX And, U And attempts failed (due to cloud)
   
Bullet Nearby Stars (astrometric monitoring)
- Barnards Star, EV Lac
   
  - Teegardens Star attempt failed (due to cloud)
- All night session (3.6 hr), preceeded by some equipment work to rotate 178MC Camera to Camera Angle ~0° and align the TS80 Guidescope. Sky quality poor (haze and bright moonlit illumination). Warm night (14.5°).
   
- 12" LX200 + ST-10XME for imaging
- TS 80mm APO + ZWO ASI178MC for guiding & imaging
- Ambient Temperature : 14.5°C (min)
- CCD Temperature: -5°/ -10°C
- Notes from 2025-08-12 >>
   
-
   

Observing Result

Image

Back to Top

AT 2023cuz - Type YSO Transient, UY Aur

AT 2023cuz / UY Aur (Auriga)
AT 2023cuz (Type: YSO) discovered 2023-03-07.629 UT by Gaia
Alias: Gaia23bar, UY Aur
Discovery Magnitude 13.48 (G-Gaia Filter)
vs Historic magnitude 11.80 +/- 0.21 SD
Known YSO UY Aur fades by ~1.5 mag
 ( TNS 2023cuz | Gaia23bar)
 
AT 2023cuz - 2025-08-13 (T+889.4d)
Image below (2025-08-13.071) was taken 889.4 days after discovery of 2023cuz
Position of reported transient, UY Aur (distinct, brighter ?) is shown by white cross-hairs 
Measured magnitude +12.21 (Clear Filter)
Poor quality image (poor sky transparency)

Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 90s exposure (average combine), 3x3 binning, Clear Filter
2025-08-13 01:47 UT (#1347091-95)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of AT 2023cuz (UY Aur) on Transients 2023 Page >>

Back to Top

IC 4408 - Spiral Galaxy with Type Ia Supernova 2025kfm

IC 4408 with SN 2025kfm (Bootes)
SN 2025kfm (Type: Ia) discovered 2025-05-09.394 UT by ATLAS
using ATLAS Mauna Loa Telescope
Alias: ATLAS25ewy
Discovery Magnitude 18.44 (orange-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 19.10
 ( TNS 2025kfm )
 
IC 4408 with SN 2025kfm - 2025-08-12 (T+95.6d)
Image below (2025-08-12.981) was taken 95.6 days after discovery of 2025kfm
Position of reported supernova (not visible) is shown by white cross-hairs 
Very poor quality image (poor sky transparency / single frame)

Image
Annotated CCD Image (150% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2025-08-12 23:33 UT (#1347007)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
IC 4408 with SN 2025kfm - Earlier Image, 2025-05-16 (T+7.6d)
Image below (2025-05-16.969) was taken 7.6 days after discovery of 2025kfm
Position of reported supernova (faint) is shown by white cross-hairs 
Estimated Magnitude +16.2 (Clear Filter)

Image
Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-05-16 23:25 UT (#1327023-27)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2025kfm (in IC 4408) on Supernova 2025 Page >>

Back to Top

IC 4408 - Spiral Galaxy with Type Ia Supernova 2025kfm

IC 4408 with SN 2025kfm (Bootes)
SN 2025kfm (Type: Ia) discovered 2025-05-09.394 UT by ATLAS
using ATLAS Mauna Loa Telescope
Alias: ATLAS25ewy
Discovery Magnitude 18.44 (orange-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 19.10
 ( TNS 2025kfm )
 
IC 4408 with SN 2025kfm - 2025-08-12 (T+95.6d)
Image below (2025-08-12.981) was taken 95.6 days after discovery of 2025kfm
Position of reported supernova (not visible) is shown by white cross-hairs 
Very poor quality image (poor sky transparency / single frame)

Image
Annotated CCD Image (150% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2025-08-12 23:33 UT (#1347007)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
IC 4408 with SN 2025kfm - Earlier Image, 2025-05-16 (T+7.6d)
Image below (2025-05-16.969) was taken 7.6 days after discovery of 2025kfm
Position of reported supernova (faint) is shown by white cross-hairs 
Estimated Magnitude +16.2 (Clear Filter)

Image
Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-05-16 23:25 UT (#1327023-27)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2025kfm (in IC 4408) on Supernova 2025 Page >>

Back to Top

M31 - Spiral Galaxy with Transient AT 2025etj  (non-detection)

M31 with AT 2025etj (Andromeda)
AT 2025etj (Type: unk) discovered 2025-03-17.587 UT by XOSS
Alias: PSP25G, PNV J00411965+4138256
Discovery Magnitude 17.51 (Clear Filter)
( TNS 2025etj )
 
M31 with AT 2025etj - 2025-08-13 (T+148.5d)
Image below (2025-08-13.048) was taken 148.5 days after discovery of 2025etj
Position of reported transient (not visible) is shown by white cross-hairs 
Non-Detection Limiting Magnitude +17.8 (Clear Filter)

Image
Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-08-13 01:18 UT (#1347063-67)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
M31 with AT 2025etj - Earlier Image 2025-03-20 (T+2.6d)
Image below (2025-03-20.166) was taken 2.6 days after discovery of 2025etj
Position of reported transient (faint but distinct) is shown by white cross-hairs 
Measured Magnitude +16.80 (Clear Filter)

Image
Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-20 04:07 UT (#1304224-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of AT 2025etj  (in M31) on Transients 2025 Page >>
 

Back to Top

NGC 3938 - Spiral Galaxy with Unconfirmed Transient AT 2025naw  (non-detection)

NGC 3938 with AT 2025naw (Ursa Major)
AT 2025naw (Type: unconf) discovered 2025-06-07.664 UT by Yuan-Sheng Tsai
using PlaneWave CDK17" Telescope
Discovery Magnitude 18.4 (L Filter)
 ( TNS 2025naw )
  
NGC 3938 with AT 2025naw - 2025-08-13 (T+66.4d)
 Image below (2025-08-13.023) was taken 66.4 days after discovery of 2025naw
Position of SN (not visible) is shown by white cross-hairs
Poor quality image (due to poor sky transparency), compare with the
far superior 2022 image of NGC 3938 w/2022xlp
Image
Annotated CCD Image (100% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-08-13 00:40 UT (#1347034-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
NGC 3938 with earlier Type Ia-02cx Supernova 2022xlp - 2022-10-23 (T+9.3d)
 Image below (2022-10-23.067) was taken 9.3 days after discovery of 2022xlp
Position of SN (distinct) shown by white cross-hairs
Measured magnitude +15.67
Image
Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2022-10-23 01:46 UT (#1048091-95)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Images of SN 2025naw (NGC 3938) on Supernova 2025 Page >>

Back to Top

This Web Page: Images - Session 1347 (2025-08-12)
Last Updated : 2025-08-15
Site Owner : David Richards
Home Page : David's Astronomy Web Site