David's Astronomy Pages Images - Session 1350 (2025-08-16)

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Images (S1351)

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Session Notes

Nova Ser 2025 (V691 Ser)     AT 2024uvv - CV Type Transient  (non-detection) AT 2025ld - Transient  (non-detection)     IC 4408 - Spiral Galaxy with Type Ia Supernova 2025kfm  (non-detection)     NGC 681 - Spiral Galaxy with Type Ic-BL Supernova 2024abup  (non-detection) NGC 4395 - Spiral Galaxy with Transient AT 2025lwi  (non-detection) NGC 7331 - Spiral Galaxy with Type Ia Supernova 2025rbs NGC 7753 - Spiral Galaxy with Type Ia Supernova 2025kyg     PN G054.2-03.4 - Planetary Nebula     SN 2025jtq - Type II Supernova in WISEA Galaxy (PGC 134730) SN 2025taz - Type Ia Supernova in WISEA Galaxy (PGC 166556)     UGC 1206 - Galaxy with Type Ia Supernova 2025pao     Variable Stars (photometric monitoring) - T CrB, BL Lac     Nearby Stars (astrometric monitoring) - None

- All night session (4.9hr). Clear all night     - 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 2025-08-16 >>     -

Observing Result

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Nova Ser 2025 (V691 Ser)

Nova Ser 2025  (Serpens) Nova Ser 2025 discovered 2025-07-17.908 UT by New Milky Way Survey (TCP J18385851-0351482 - discovered 2025-07-17.909 UT by ZTF Alias: ZTF25abbsdyb, N Ser 2025, V691 Ser Discovery Magnitude 11.9

Nova Ser 2025 - 2025-08-16 (T+30.1d) Image below (2025-08-16.963) was taken 30.1 days after discovery of nova Position of nova (distinct) is shown by white cross-hairs Measured Magnitude +13.40 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-08-16 23:08 UT (#1350029-31) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Ser 2025 - 2025-08-17 (T+30.1d) Image below (2025-08-17.008) was taken 30.1 days after discovery of Nova Position of nova (distinct) is shown by white cross-hairs Measured Magnitude +13.40 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-08-17 00:14 UT (#1350059-63) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Ser 2025 - Earlier Image, 2025-08-09 (T+23.1d) Image below (2025-08-09.997) was taken 23.1 days after discovery Position of nova (bright) is shown by white cross-hairs Measured Magnitude +12.93 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-10 00:04 UT (#1346013-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Ser 2025 on Novae 2025 Page >>

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AT 2024uvv - CV Type Transient  (non-detection)

AT 2024uvv (Delphinus) AT 2024uvv (Type: CV) discovered 2024-09-06.746 UT by XOSS Alias: KATS24R007, TCP J20544897+1023264 Discovery Magnitude 14.55 (Clear Filter) CV candidate classified by XOSS   ( TNS 2024uvv )

AT 2024uvv - 2025-08-17 (T+344.3d) Image below (2025-08-17.031) was taken 344.3 days after discovery of 2024uvv Position of earlier transient (faded & no longer visible) is shown by white cross-hairs Non--Detection Limiting Magnitude +19.3 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-17 00:54 UT (#1350073-77) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024uvv - Earlier Image, 2024-09-11 (T+5.2d) Image below (2024-09-11.954) was taken 5.2 days after discovery of 2024uvv Position of earlier transient (faint but distinct, fading) is shown by white cross-hairs  Measured magnitude +15.91 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-09-11 23:03 UT (#1241027-31) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024uvv on Transients 2024 Page >>

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AT 2025ld - Transient  (non-detection)

AT 2025ld (Cygnus) AT 2025ld (Type: unk) discovered 2025-01-09.118 UT by ZTF using Palomar 1.2m Oschin Alias: ZTF25aabknlu Discovery Magnitude 15.67 (g-ZTF Filter) vs Prior Non-Detection Limiting Magnitude 19.75 Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot  ( TNS 2025ld )

AT 2025ld - 2025-08-16 (T+219.9d) Image below (2025-08-16.984) was taken 219.9 days after discovery of 2025ld Position of earlier transient (faded & no longer visible) is shown by white cross-hairs Non--Detection Limiting Magnitude +19.6 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-16 23:44 UT (#1350047-51) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025ld on Transients 2025 Page >>

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IC 4408 - Spiral Galaxy with Type Ia Supernova 2025kfm

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NGC 681 - Spiral Galaxy with Type Ic-BL Supernova 2024abup  (non-detection)

NGC 681 with SN 2024abup (Cetus) SN 2024abup (Type: Ic-BL) discovered 2024-11-22.351 UT by ATLAS Alias: ATLAS24qlf, Gaia24dsy Discovery Magnitude 17.02 (cyan-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.48 Confirmed SN Ic-BL  ( TNS 2024abup | Gaia24dsy )

NGC 681 with SN 2024abup - 2025-08-17 (T+267.7d) Image below (2025-08-17.090) was taken 267.7 days after discovery of 2024abup Position of earlier SN (faded & no longer visible) is indicated by white cross-hairs. Non-Detection Limiting Magnitude +18.8 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-17 02:18 UT (#1350102-06) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 681 with SN 2024abup - Earlier Image, 2024-11-26 (T+4.5d) Image below (2024-11-26.826) was taken 4.5 days after discovery of 2024abup Position of reported SN (faint but distinct) is indicated by white cross-hairs. Estimated Magnitude +16.0 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-26 19:57 UT (#1276038-42) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024abup (in NGC 681) on Supernova 2024 Page >>

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NGC 4395 - Spiral Galaxy with Transient AT 2025lwi  (non-detection)

NGC 4395 with AT 2025lwi (Canes Venatici) AT 2025lwi (Type: unk) discovered 2025-05-24.805 UT by Yuan-Sheng Tsai using Mewlon300 + QHY294M Discovery Magnitude 17.90 (L Filter)  ( TNS 2025lwi)

NGC 4395 with AT 2025lwi - 2025-08-16 (T+84.1d) Image below (2025-08-16.942) was taken 84.1 days after discovery of 2025lwi Position of reported transient (not visible) is shown by white cross-hairs. Non-Detection Limiting Magnitude +18.8

Annotated CCD Image (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-16 22:44 UT (#1350015-18) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4395 - Earlier Image with AT 2022fmn  - 2022-04-27 (T+28.2d) Image below (2022-04-27.999) was taken 28.2 days after discovery of 2022fmn Position of reported AGN  (bright & distinct) is shown by white cross-hairs) Measured Magnitude +15.91

Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-28 00:09 UT (#1004049-53) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025lwi (NGC 4395) on Transients 2025 Page

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NGC 7331 - Spiral Galaxy with Type Ia Supernova 2025rbs

NGC 7331 with SN 2025rbs (Pegasus) SN 2025rbs (Type: Ia) discovered 2025-07-14.141 UT by GOTO using GOTO-North Telescope Alias: GOTO25evh, ATLAS25hsl, PS25feg, ZTF25abbgajq Discovery Magnitude 17.07 (L-Goto Filter) vs Prior Non-Detection Limiting Magnitude 20.1  ( TNS 2025rbs )

NGC 7331 with SN 2025rbs - 2025-08-17 (T+33.9d) Image below (2025-08-17.046) was taken 33.9 days after discovery of 2025rbs Position of reported supernova (distinct) is shown by white cross-hairs Measured Magnitude +12.40 (Clear Filter)

Annotated CCD Image (125% size, log scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-17 01:14 UT (#1350080-84) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 7331 with SN 2025rbs - Earlier Image, 2025-08-03 (T+19.9d) Image below (2025-08-03.016) was taken 19.9 days after discovery of 2025rbs Position of reported supernova (distinct) is shown by white cross-hairs Measured Magnitude +12.08 (Clear Filter)

Annotated CCD Image (125% size, log scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-03 00:30 UT (#1345057-60) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025rbs (in NGC 7331) on Supernova 2025 Page >>

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NGC 7753 - Spiral Galaxy with Type Ia Supernova 2025kyg

NGC 7753 with SN 2025kyg (Pegasus) SN 2025kyg (Type: Ia) discovered 2025-05-21.430 UT by ATLAS using Palomar 1.2m Oschin Telescope Alias: ATLAS25fee, ZTF25aaqhnsd, GOTO25dby Discovery Magnitude 15.72 (r-ZTF Filter) vs Prior Non-Detection Limiting Magnitude 18.25  ( TNS 2025kyg )

NGC 7753 with SN 2025kyg (T+87.6d)

Annotated CCD Image (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-17 01:35 UT (#1350087-91) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 7753 with SN 2025kyg - 2025-08-17 (T+87.6d) Image below (2025-08-17.061) was taken 87.6 days after discovery of 2025kyg Position of reported supernova (faint) is shown by white cross-hairs Estimated Magnitude +17.8 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-17 01:35 UT (#1350087-91) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image (125% size, square root scale, cropped) Image details as above

NGC 7753 / ARP 86 - Earlier Image (Aug 2022)  [ ARP Galaxies ]

Annotated CCD Image (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2022-08-20 00:48 UT (#1029066-70) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image (125% size, square root scale, cropped) Image details as above

Images of SN 2025kyg (in NGC 7753) on Supernova 2025 Page >>

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PN G054.2-03.4 - Planetary Nebula

PN G054.2-03.4 (Sagitta) cf. Ast. Now, Jul 2021, p11  [ Planetary Nebula ]

Annotated CCD Image (70% size, square root scale) 4 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-08-16 23:20 UT (#1350036-40) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

PN G054.2-03.4 - Detail

Annotated CCD Image (150% size, square root scale, cropped) 4 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-08-16 23:20 UT (#1350036-40) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image (150% size, square root scale, cropped) Image details as above

PN G054.2-03.4 - Earlier Image (Nov 2022) Position of Pl.Neb (faint) is indicated by white circle

Annotated CCD Image (150% size, square root scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, Clear Filter 2022-11-27 20:13 UT (#1063071-75) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Position of Pl.Neb (faint) is indicated by black cross-hairs

Negative CCD Image (150% size, square root scale, cropped) Image details as above

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SN 2025jtq - Type II Supernova in WISEA Galaxy (PGC 134730)

SN 2025jtq (Cetus) Alias: In WISEA J005731.88-172146.9 / PGC 134730 SN 2025jtq (Type: II) discovered 2025-05-04.420 UT by ASAS-SN using ASASSN-Cassius Telescope Alias: ASASSN-25bs Discovery Magnitude 15.90 (g-Sloan Filter) vs Prior Non-Detection Limiting Magnitude 16.8  ( TNS 2025jtq )

SN 2025jtq - 2025-08-17 (T+104.7d) Image below (2025-08-17.076) was taken 104.7 days after discovery of 2025jtq Position of reported supernova (distinct) is shown by white cross-hairs Measured Magnitude, Gal. Centre & SN +15.60 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-17 01:57 UT (#1350094-98) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025jtq (in WISEA Galaxy) on Supernova 2025 Page >>

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SN 2025taz - Type Ia Supernova in WISEA Galaxy (PGC 166556)

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UGC 1206 - Galaxy with Type Ia Supernova 2025pao

UGC 1206 with SN 2025pao (Pisces) SN 2025pao (Type: Ia) discovered 2025-06-26.454 UT by CRTS Alias: SNhunt473, GOTO25ein, ATLAS25gwy, ZTF25ababeev Discovery Magnitude 17.5 (V-CRTS Filter) vs Prior Non-Detection Limiting Magnitude 21.2  ( TNS 2025pao )

UGC 1206 Galaxy

Annotated CCD Image (50% size, square root scale) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-17 02:38 UT (#1350109-11) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 1206 with SN 2025pao - 2025-08-17 (T+51.7d) Image below (2025-08-17.106) was taken 51.7 days after discovery of 2025pao Position of reported SN (very faint) is shown by white cross-hairs Estimated Magnitude +18.5 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-17 02:38 UT (#1350109-11) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025pao (in UGC 1206) on Supernova 2025 Page >>

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