David's Astronomy Pages
Images - Session 1445 (2026-08-24)

Objects Session Notes
Bullet AT 2025lc - CV Type Transient
Bullet AT 2026iul - CV Type Transient
Bullet AT 2026lcz - Type LPV Transient  (non-detection)
 
Bullet IC 5191 - Spiral Galaxy with Type Ia Supernova 2026myp  (non-detection)
Bullet LEDA 214810 - Galaxy with Type Ia Supernova 2026lda
Bullet M31 - Spiral Galaxy with Transient AT 2026jnl  (non-detection)
 
Bullet UGC 11058 - Spiral Galaxy with Type Ia Supernova 2026ewd
 
Bullet Variable Stars (photometric monitoring)
- T CrB, CI Cyg, AM Her, BL Lac, CY Lyr
 
Bullet Nearby Stars (astrometric monitoring)
- None
 
- Attempted All-Night Session (3.6 hr)
- 12" LX200 + ST-10XME for imaging
- TS 80mm APO + ZWO ASI178MC for guiding & imaging
- Ambient Temperature: 9°C (min)
- CCD Temperature:  -10°/-15°C
- Notes from 2026-08-24 >>
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Observing Result

Image

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AT 2025lc  - CV Type Transient

AT 2025lc (Cygnus)
AT 2025lc (Type: CV) discovered 2025-01-10.553 UT by Gaia
Alias: Gaia25add
Discovery Magnitude 14.48 (G-Gaia Filter)
vs Prior Non-Detection Limiting Magnitude 21.5 (G-Gaia Filter)
Gaia Alerting Magnitude 14.48
vs Historic Magnitude 15.89 +/- 0.61 SD
Outburst in candidate CV
( TNS 2025lc | Gaia25add )
 
AT 2025lc - 2026-08-24 (T+591.3d)
Image below (2026-08-24.885) was taken 591.3 days after discovery of 2025lc
Position of earlier transient (faint) is shown by white cross-hairs
Measured Magnitude +14.90 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-08-24 21:18 UT (#1445012-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of AT 2025lc on Transients 2025 Page  >>

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AT 2026iul  - CV Type Transient

AT 2026iul (Cygnus)
AT 2026iul (Type: CV) discovered 2026-04-07.397 UT by GEOTS
Alias: GEOTS-PAPA-SHANKAR-2026-003
Discovery Magnitude 15.7 (Clear Filter)
vs Prior Non-Detection Limiting Magnitude 18 (Clear Filter)
Discovered in Cyg using 14" f/2.0 Astrograph at Golden Ears Observatory (MPC code U55).
Group reports a significant brightening of the Gaia DR3 variable star 2033708559892804224 (VSX).
Recent observations show an increase in magnitude of >2.3 when compared to the last
recorded observation from Golden Ears Observatory on 02 March 2026.

( TNS 2026iul )
 
AT 2026iul - 2026-08-24 (T+139.5d)
Image below (2026-08-24.942) was taken 139.5 days after discovery of 2026iul
Position of earlier transient (faint) is shown by white cross-hairs
Measured Magnitude +15.29 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-08-24 22:39 UT (#1445049-53)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of AT 2026iul on Transients 2026 Page  >>

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AT 2026lcz  - Type LPV Transient  (non-detection)

AT 2026lcz (Sagitta)
AT 2026lcz (Type: LPV) discovered 2026-04-30.292 UT by MASTER
Alias: MASTER OT J192144.27+175308.5
Discovery Magnitude 15.4 (Other Filter)
vs Prior Non-Detection Limiting Magnitude 18.5 (Other Filter)
long variable, in history:m=14.0 at 2021-10-29 01:49:43
( TNS 2026lcz )
 
AT 2026lcz - 2026-08-24 (T+116.6d)
Image below (2026-08-24.926) was taken 116.6 days after discovery of 2026lcz
Position of earlier transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.0 (Clear Filter)
Image
Annotated CCD Image (150% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-08-24 22:22 UT (#1445042-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of AT 2026lcz on Transients 2026 Page  >>

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IC 5191  - Spiral Galaxy with Type Ia Supernova 2026myp  (non-detection)

IC 5191 with SN 2026myp (Lacerta)
SN 2026myp (Type: Ia) discovered 2026-05-17.575 UT by ATLAS
Alias: ATLAS26fxq, ZTF26aawrmyb
Discovery Magnitude 17.878 (cyan-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 16.46 (cyan-ATLAS Filter)
( TNS 2026myp )
 
IC 5191 with SN 2026myp - 2026-08-24 (T+99.4d)
Image below (2026-08-24.950) was taken 99.4 days after discovery of 2026myp
Position of earlier supernova (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.0 (Clear Filter)
Image
Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-08-24 22:57 UT (#1445056-60)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2026myp (in IC 5191) on Supernovae 2026 Page  >>

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LEDA 214810  - Galaxy with Type Ia Supernova 2026lda

LEDA 214810 with SN 2026lda (Pegasus)
SN 2026lda (Type: Ia) discovered 2026-04-29.492 UT by ZTF
Alias: DCAP34, ZTF26aaupgtw
Discovery Magnitude 19.207 (r-ZTF Filter)
vs Prior Non-Detection Limiting Magnitude (r-ZTF Filter)
Group reports the discovery of a candidate SN.(DCAP pipeline DCAP34=ZTF26aaupgtw)
( TNS 2026lda )
 
LEDA 214810 with SN 2026lda - 2026-08-24 (T+117.5d)
Image below (2026-08-24.983) was taken 117.5 days after discovery of 2026lda
Position of earlier supernova (very faint) is shown by white cross-hairs
Image
Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-08-24 23:43 UT (#1445071-75)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2026lda (in LEDA 214810) on Supernovae 2026 Page  >>

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M31  - Spiral Galaxy with Transient AT 2026jnl  (non-detection)

M31 with AT 2026jnl (Andromeda)
AT 2026jnl (Type: unk) discovered 2026-04-08.079 UT by Kamil Hornoch et al.
Alias: Nova M31 2026-04a, PNV J00433836+4115324
Discovery Magnitude 17.2 (Ha Filter)
vs Prior Non-Detection Limiting Magnitude 19.6 (Ha Filter)
Initially reported in ATel #17748; position updated/corrected in ATel #17750.
( TNS 2026jnl )
[ Messier Objects
 
M31 with AT 2026jnl - 2026-08-24 (T+138.9d)
Image below (2026-08-24.967) was taken 138.9 days after discovery of 2026jnl
Position of earlier transient (not visible) is shown by white circle
Non-Detection Limiting Magnitude +18.9 (Clear Filter)
Image
Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-08-24 23:20 UT (#1445063-67)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of AT 2026jnl (in M31 AT2026jnl) on Transients 2026 Page  >>

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UGC 11058  - Spiral Galaxy with Type Ia Supernova 2026ewd

UGC 11058 with SN 2026ewd (Hercules)
SN 2026ewd (Type: Ia) discovered 2026-03-05.583 UT by ATLAS
Alias: ATLAS26cph, GOTO26bqj, ZTF26aajugdc
Discovery Magnitude 17.346 (orange-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 19.52 (orange-ATLAS Filter)
( TNS 2026ewd )
 
UGC 11058 with SN 2026ewd - 2026-08-24 (T+172.3d)
Image below (2026-08-24.910) was taken 172.3 days after discovery of 2026ewd
Position of earlier supernova (very faint) is shown by white cross-hairs
Estimated Magnitude +18.0 (Clear Filter)
Image
Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-08-24 22:00 UT (#1445035-39)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
UGC 11058 with SN 2026ewd - Earlier Image, 2026-03-18 (T+12.6d)
Image below (2026-03-18.154) was taken 12.6 days after discovery of 2026ewd

Position of earlier supernova (faint but distinct) is shown by white cross-hairs
Measured Magnitude +15.10 (Clear Filter)
Image
Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-03-18 03:50 UT (#1408033-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2026ewd (in UGC 11058) on Supernovae 2026 Page  >>

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