David's Astronomy Pages
Images - Session 1442 (2026-07-30)

Objects Session Notes
Bullet Nova Aql 2026 - Nova (AT 2026rdg, V2104 Aql)
 
Bullet AT 2026iul - CV Type Transient
Bullet AT 2026stb - Nova
 
Bullet M31N 2025-10a? - Extragalactic Nova in M31  (non-detection)
Bullet M31N 2026-04a? - Extragalactic Nova in M31  (non-detection)
 
Bullet UGC 11058 - Spiral Galaxy with Type Ia Supernova 2026ewd
Bullet UGC 12040 - Spiral Galaxy with Type Ia Supernova 2026kux  (non-detection)
 
Bullet Variable Stars (photometric monitoring)
- T CrB, AM Her, BL Lac, CY Lyr, DY Per
 
Bullet Nearby Stars (astrometric monitoring)
- Groombridge 34, Teegarden's Star
 
- All-Night Session (4.1 hr)
- 12" LX200 + ST-10XME for imaging
- TS 80mm APO + ZWO ASI178MC for guiding & imaging
- Ambient Temperature: 7°C (min)
- CCD Temperature:  -10°/-15°C
- Notes from 2026-07-30 >>
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Observing Result

Image

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Nova Aql 2026  - Nova (AT 2026rdg, V2104 Aql)

Nova Aql (Aquila)

Nova Aql 2026 (Type: Nova) discovered 2026-07-01.300 UT by M. Ning
Alias: V2104 Aql, AT 2026rdg
Discovery Magnitude 12.53 (r-ZTF Filter)
vs Prior Non-Detection Limiting Magnitude ( Filter)
Group reports the discovery of a candidate nova.(DCAP238=ZTF26abemjfk)
https://dcap-minruining.github.io/DCAP/
Image taken with SQA130mm, Luminance 200sx3.
( TNS 2026rdg )
[ Novae
 
Image
Annotated CCD Image (50% size, linear scale)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-07-30 22:43 UT (#1442022-25)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Nova Aql 2026 - 2026-07-30 (T+29.6d)
Image below was taken 29.6 days after nova discovery
Position of nova (distinct) is shown by white cross-hairs
Measured Magnitude +12.59 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-07-30 22:43 UT (#1442022-25)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Nova Aql 2026 - Spectral Image, 2026-07-30 (T+29.6d)
Image
CCD Image (linear scale, rotated, cropped)
5 x 90s exposure (average combine), 2x2 binning, S Filter
2026-07-30 22:50 UT (#1442026-30)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Nova Aql 2026 - Spectral, 2026-07-30 (T+29.6d)
Image
 
Images of Nova Aql 2026 on Novae 2026 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 - 2026-07-30 (T+114.6d)
Image below (2026-07-30.965) was taken 114.6 days after discovery of 2026iul
Position of earlier transient (faint) is shown by white cross-hairs
Measured Magnitude +15.16 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-07-30 23:12 UT (#1442038-42)
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 2026stb  - Nova

AT 2026stb (Scutum)
Alias: AT 2026stb
AT 2026stb (Type: Nova) discovered 2026-07-08.000 UT by ZTF
Discovery Magnitude 15.06 (r-ZTF Filter)
vs Prior Non-Detection Limiting Magnitude ( Filter)
Group reports a CV candidate that appears red; possible nova candidate. (DCAP269=ZTF26abfokua) https://dcap-minruining.github.io/DCAP/
zr=15.06mag, zg=17.11mag, zg-zr=2.05mag
Image taken with Takahashi 180mm, Luminance 120s.
Optical spectrum of AT2026stb shows a highly reddened continuum dominated by a
very strong, prominent H-alpha emission line, consistent with a Galactic Nova
( TNS 2026stb )
[ Novae
 
AT 2026stb (Nova) - 2026-07-30 (T+23.0d)
Image below (2026-07-30.974) was taken 23.0 days after discovery of 2026stb
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +12.38 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
3 x 120s exposure (average combine), 3x3 binning, Clear Filter
2026-07-30 23:27 UT (#1442046-49)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of AT 2026stb on Transients 2026 Page  >>

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M31N 2025-10a? - Extragalactic Nova in M31  (non-detection)

M31 with M31N 2025-10a? (Andromeda)
Nova M31 2025-10a? (Type: unk) discovered 2025-10-17.480 UT by Koichi Itagaki
Alias: TCP J00384865+4046079
[ Messier Objects
 
M31 with M31N 2025-10a? - 2026-07-31 (T+286.6d)
Image below (2026-07-31.054) was taken 286.6 days after discovery of M31N 2025-10a?
Position of earlier transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.1 (Clear Filter)
Image
Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-07-31 01:27 UT (#1442090-94)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
M31 w/M31N 2025-10a? - Earlier Image (2025-11-20)
Image below (2025-11-20.882) was taken 34.4 days after discovery of M31N 2025-10a?
Position of earlier transient (distinct) is shown by white cross-hairs
Measured Magnitude +14.46 (Clear Filter)
Image
Annotated CCD Image (125% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-11-20 21:17 UT (#1375021-24)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of M31N 2025-10a? (in M31) on Transients 2025 Page  >>

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M31N 2026-04a? - Extragalactic Nova in M31  (non-detection)

M31 with M31N 2026-04a? (Andromeda)
M31N 2026-04a? (Type: EGN?) discovered 2026-04-08.079 UT by Kamil Hornoch et al.
Alias: PNV J00433836+4115324
[ Messier Objects
 
M31 with M31N 2026-04a? - 2026-07-31 (T+114.0d)
Image below (2026-07-31.040) was taken 114.0 days after discovery of M31N 2026-04a?
Position of earlier transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.1 (Clear Filter)
Image
Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-07-31 01:07 UT (#1442083-87)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of M31N 2026-04a? (in M31) 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 (cyan-ATLAS Filter)
( TNS 2026ewd )
 
UGC 11058 with SN 2026ewd - 2026-07-30 (T+147.4d)
Image below (2026-07-30.985) was taken 147.4 days after discovery of 2026ewd
Position of earlier supernova (faint) is shown by white cross-hairs
Estimated 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
2026-07-30 23:48 UT (#1442053-57)
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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UGC 12040  - Spiral Galaxy with Type Ia Supernova 2026kux  (non-detection)

UGC 12040 with SN 2026kux (Lacerta)
SN 2026kux (Type: Ia) discovered 2026-04-24.204 UT by ATLAS
Alias: ATLAS26exf, ZTF26aawwyvk
Discovery Magnitude 18.422 (wide-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 19.04 (wide-ATLAS Filter)
( TNS 2026kux )
 
UGC 12040 with SN 2026kux - 2026-07-31 (T+97.8d)
Image below (2026-07-31.024) was taken 97.8 days after discovery of 2026kux
Position of earlier supernova (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.3 (Clear Filter)
Image
Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-07-31 00:44 UT (#1442076-80)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
UGC 12040 w/SN2026kux - Earlier Image, 2026-05-01 (T+6.9d)
Image below (2026-05-01.058) was taken 6.9 days after discovery of 2026kux
Position of earlier transient (faint) is shown by white cross-hairs
Measured Magnitude +16.78 (Clear Filter)
Image
Annotated CCD Image (150% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-05-01 01:26 UT (#1428112-13)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2026kux (in UGC 12040) on Supernovae 2026 Page  >>

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