David's Astronomy Pages Images - Session 1352 (2025-08-26)

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Images (S1353)

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Session Notes

C/2020 T2 (Palomar) - Comet  (non-detection)     Nova Per 2020 - Nova (V1112 Per) Nova Ser 2025 (V691 Ser)     NSV 14339 - Variable  (Short Exposure Testing)     NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw NGC 7331 - Spiral Galaxy with Type Ia Supernova 2025rbs     SN 2025taz - Type Ia Supernova in WISEA Galaxy (PGC 166556)     UGC 1206 - Galaxy with Type Ia Supernova 2025pao UGC 1814 - Spiral Galaxy with Type II Supernova 2025oas UGC 4973 - Spiral Galaxy with Type IIb Supernova 2025ovr  (non-detection) UGC 10058 - Spiral Galaxy with Type II Supernova 2025gvs UGC 10809 & PGC 200345  - Galaxy with Type Ic-BL Supernova 2025vaw     Variable Stars (photometric monitoring) - RX And, T CrB, BL Lac     Nearby Stars (astrometric monitoring) - HH And, 61 Cyg, Gliese 65, Groombridge 34, Teegardens Star

- All night session (6.3hr).     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature : 11°C (min) - CCD Temperature:  -10°C - Notes from 2025-08-26 >>     -

Observing Result

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C/2020 T2 (Palomar) - Comet  (non-detection)

C/2020 T2 (Palomar) - 2025-08-27 (passing through Cetus) Sun Distance 12.65 AU (receeding) Earth Distance 11.93 AU (1785 million km)		C/2020 T2 (Palomar) - 2025-08-27, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -6.52 arcsec/hr, Dec -6.22 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 15 x 45s exposure (average combine), 3x3 binning, Clear Filter 2025-08-27 03:08 UT (#1352256-70) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, log scale, cropped) Image details as left
Images of C/2020 T2 (Palomar) on Comets 2021 Page >>
Images of C/2020 T2 (Palomar) on Comets 2025 Page >>

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Nova Per 2020 - Nova (V1112 Per, AT 2020abap)

Nova Per 2020 (Perseus) Nova in Perseus discovered 2020/11/25.807 [ Novae ] Nova Per 2020 discovered independently by Seiji Ueda and Stanislav Korotkiy et al AT 2020abap (Type: CV) reported 2020/11/27.230 UT by PGIR Alias: N Per 2020 , PGIR20fbf, TCP J04291888+4354233, TCP J04291884+4354232, V1112 Per

Nova Per 2020 - 2025-08-26 (T+1735.2d) Image below (2025-08-26.974) was taken 1735.2 days after discovery of Nova Per 2020 Position of earlier nova (very faint) is shown by white cross hairs.   Measured Magnitude +18.71 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-26 23:29 UT (#1352051-54) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Per 2020 - Earlier Image, 2020-12-20 (T+25.2d) Image below (2020-12-20.821) was taken 25.2 days after discovery of Nova Position of nova (bright) is shown by white cross hairs.   Measured magnitude +11.3

CCD Image (100% size, linear scale, cropped) 4 x 90s exposure (average combine), 3x3 binning, C Filter 2020-12-20 23:09 UT (#840125-29) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Per 2020 on Novae Page >>

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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 - 2025-08-26 (T+40.0d) Image below (2025-08-26.949) was taken 40.0 days after discovery of nova Position of nova (distinct) is shown by white cross-hairs Measured Magnitude +13.68 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-08-26 22:50 UT (#1352036-40) 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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NSV 14339 - Variable  (Short Exposure Testing)

NSV 14339 (Lacerta) Short Exposure Testing  NSV 14339 Updated Coords  22 51 58.440,   +47 19 01.00 14339 |225158.44 +471901.0 -0.006 -0.003 2000.0 UCAC2 | |-| 13.4 :| |p |0061 GSC SA 42,1767 |G0: |

3 x 30s (average combine) - 90s total exposure NSV 14339 - Measured Magnitude +11.76 (Clear Filter)

Annotated CCD Image (70% size, linear scale) 100 x 0.12s exposure (sum combine), 3x3 binning, Clear Filter 2025-08-27 02:34 UT (#1352139-245)-54) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

3 x 10s (average combine) - 30s total exposure NSV 14339 - Measured Magnitude +11.68 (Clear Filter)

Annotated CCD Image (70% size, linear scale) 3 x 10s exposure (average combine), 3x3 binning, Clear Filter 2025-08-27 02:35 UT (#1352167-221) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Single 10s  - 10s total exposure NSV 14339 - Measured Magnitude +11.67 (Clear Filter)

Annotated CCD Image (70% size, linear scale) 3 x 10s exposure (average combine), 3x3 binning, Clear Filter 2025-08-27 02:35 UT (#1352167-221) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

100 x 0.12s (sum combine) - 12s total exposure NSV 14339 - Measured Magnitude +11.64 (Clear Filter)

Annotated CCD Image (70% size, linear scale) 100 x 0.12s exposure (sum combine), 3x3 binning, Clear Filter 2025-08-27 02:34 UT (#1352139-245)-54) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

100 x 0.12s (average combine) - 12s total exposure NSV 14339 - Measured Magnitude  - not measurable (link failed - too few stars)

Annotated CCD Image (70% size, linear scale) 100 x 0.12s exposure (average combine), 3x3 binning, Clear Filter 2025-08-27 02:34 UT (#1352139-245)-54) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw

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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 - 2025-08-27 (T+43.9d) Image below (2025-08-27.046) was taken 43.9 days after discovery of 2025rbs Position of reported supernova (distinct, but fading) is shown by white cross-hairs Estimated Magnitude +13.2 (Clear Filter)

Annotated CCD Image (125% size, log scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-27 01:14 UT (#1352117-21) 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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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 with SN 2025pao - 2025-08-26 (T+61.5d) Image below (2025-08-26.989) was taken 61.5 days after discovery of 2025pao Position of reported SN (very faint) is shown by white cross-hairs Estimated Magnitude +18.2 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-26 23:53 UT (#1352058-62) 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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UGC 1814 - Spiral Galaxy with Type II Supernova 2025oas

UGC 1814 with SN 2025oas (Aries) SN 2025oas (Type: II) discovered 2025-06-19.472 UT by ZTF using Palomar 1.2m Oschin Telescope Alias: ZTF25aavyqag, GOTO25elj, ATLAS25gub, PS25epm Discovery Magnitude 16.75 (r-ZTF Filter)  ( TNS 2025oas )

UGC 1814 with SN 2025oas - 2025-08-27 (T+68.5d) Image below (2025-08-27.003) was taken 68.5 days after discovery of 2025oas Position of earlier supernova (faint) is shown by white cross-hairs Measured Magnitude +17.6 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-27 00:13 UT (#1352065-69) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025oas (in UGC 1814) on Supernova 2025 Page >>

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UGC 4973 - Spiral Galaxy with Type IIb Supernova 2025ovr  (non-detection)

UGC 4973 with SN 2025ovr (Ursa Major) SN 2025ovr (Type: IIb) discovered 2025-06-24.880 UT by Giancarlo Cortini Alias: ZTF25aaxocya Discovery Magnitude 17.0 (Clear Filter) vs Prior Non-Detection Limiting Magnitude 19.0  ( TNS 2025ovr )

UGC 4973 with SN 2025ovr - 2025-08-27 (T+63.2d) Image below (2025-08-27.085) was taken 63.2 days after discovery of 2025ovr Position of earlier supernova (not visible) is shown by white cross-hairs Poor quality image (poor sky transparency/cloud, single frame)

Annotated CCD Image (100% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2025-08-27 02:02 UT (#1352134) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 4973 with SN 2025ovr - Later Image, 2025-08-30 (T+66.2d) Image below (2025-08-30.121) was taken 66.2 days after discovery of 2025ovr Position of supernova (very faint) is shown by white cross-hairs Estimated Magnitude +18.5

Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-30 03:02 UT (#1353057-61) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025ovr (in UGC 4973) 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 - 2025-08-26 (T+143.4d) Image below (2025-08-26.917) was taken 143.4 days after discovery of 2025gvs Position of reported supernova (faint fading slowly ?) is shown by white cross-hairs Measured Magnitude +17.20 (Clear Filter) Image shows glare from offset star,  HIP 77512 (mag 4.6), sitting 5' outside field of view

Annotated CCD Image (175% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-26 22:05 UT (#1352016-18) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 10058 with SN 2025gvs - Earlier Image, 2025-04-10 (T+4.6d) Image below (2025-04-10.069) was taken 4.6 days after discovery of 2025gvs Position of reported supernova (distinct, brightening) is shown by white cross-hairs Measured Magnitude +15.86 (Clear Filter)

Annotated CCD Image (175% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-10 01:47 UT (#1313110-13) 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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UGC 10809 & PGC 200345  - Galaxy with Type Ic-BL Supernova 2025vaw

UGC 10809 with SN 2025vaw (Hercules) AT 2025vaw (Type: unk) discovered 2025-08-22.925 UT by ATLAS using  ATLAS Teide Tenerife Telescope Alias: ATLAS25kew, ZTF25abkwytp Discovery magnitude 16.90 (wide-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 20.19  ( TNS 2025vaw)

UGC 10809 & PGC 200345 - Galaxies with SN 2025vaw (T+4.0d)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-26 22:33 UT (#1352029-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 10809 & PGC 200345 with SN 2025vaw - 2025-08-26 (T+4.0d) Image below (2025-08-26.934) was taken 4.0 days after discovery of 2025vaw Position of reported supernova (faint, but not fully separated from nucleus ) is shown by white cross-hairs Supernova appears to be associated with PGC 200345  (catalog mag +16.8) rather than with UGC 10058 Measured Magnitude +15.49 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-08-26 22:33 UT (#1352029-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025vaw (in UGC 10809 / PGC 200345) on Supernova 2025 Page >>

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