David's Astronomy Pages Images - Session 1363 (2025-09-16)

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Session Notes

C/2023 R1 (PANSTARRS) - Comet  (not confirmed) C/2024 E1 (Wierzchos) - Comet     KIC 8462852 - Variable Star (Tabby's Star) Nova Ser 2025 (V691 Ser)     AT 2022ugz - Transient  (non-detection) AT 2022wxa - Transient  (non-detection) AT 2022aefj - CV Type Transient (CM Del) AT 2025usz - Type Nova Transient AT 2025xdz - Type CV? Transient  (non-detection) AT 2025xea - Type CV? Transient     SN 2025taz - Type Ia Supernova in WISEA Galaxy (PGC 166556)     UGC 10809 & PGC 200345  - Galaxy with Type Ic-BL Supernova 2025vaw         Variable Stars (photometric monitoring) - Z And, T CrB, SS Cyg, BL Lac, CY Lyr     Nearby Stars (astrometric monitoring) - Barnards Star, EV Lac,

- Attempted all-night session (4.7 hr), but ended early due to cloud.     - 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 2025-09-16 >>           -

Observing Result

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C/2023 R1 (PANSTARRS) - Comet (not confirmed)

C/2023 R1 (PANSTARRS) - 2025-09-16 (passing through Aquila) Sun Distance 4.03 AU Earth Distance 3.43 AU (512.8 million km)		C/2023 R1 (PANSTARRS) - 2025-09-16 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -49.86 arcsec/hr, Dec -38.29 arcsec/hr) Forecast position of comet (not separately visible) is shown by white cross-hairs
Annotated CCD Image (50% size, square root scale) 3 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-16 23:19 UT (#1363117-19) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (125% size, square root scale, cropped) 7 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-16 23:22 UT (#1363117-23) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2023 R1 (PANSTARRS) on Comets 2025 Page >>

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C/2024 E1 (Wierzchos) - Comet

C/2024 E1 (Wierzchos) - 2025-09-16 (passing through Corona Borealis) Sun Distance 2.33 AU (approaching) Earth Distance 2.51 AU (375.9 million km)		C/2024 E1 (Wierzchos) - 2025-09-16 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 21.71 arcsec/hr, Dec -69.10 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-16 20:05 UT (#1363005-07) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (125% size, square root scale, cropped) 7 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-16 20:07 UT (#1363005-11) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2024 E1 (Wierzchos) on Comets 2025 Page >>

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KIC 8462852 - Variable Star (Tabby's Star)

KIC 8462852 / Tabby's Star (Cygnus) Alias: Boyajian's Star, WTF Star ("Where’s the Flux?") Distance 1470 ly. Magnitude +11.7 Star shows large irregular dimmings. KIC 8462852 shown by white cross-hairs

KIC 8462852  - Image (2025-09-16) Measured Mag +11.77 ('V') from CCDSoft Cursor Information

Annotated CCD Image  (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2025-09-16 20:40 UT (#1363021-23) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852  - Earlier Image (2025-09-11) Measured Mag +11.89 ('V') from CCDSoft Cursor Information

Annotated CCD Image  (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2025-09-11 22:31 UT (#1361071-73) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852  - Earlier Image (2025-04-12) Measured Mag +11.81 ('V') from CCDSoft Cursor Information

Annotated CCD Image  (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2025-04-12 00:12 UT (#1315090-92) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852  - Previous Image (2023-08-19) Measured Mag +11.93 ('V') from CCDSoft Cursor Information

Annotated CCD Image  (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2023-08-19 23:48 UT (#1131095-97) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852  - Previous Image (2022-05-12) Measured Mag +11.89 (V)

Annotated CCD Image  (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2022-05-12 01:25 UT (#1009094-96) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852  - Previous Image (2022-03-20) Measured Mag +12.01 (V)

Annotated CCD Image  (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2022-03-20 04:18 UT (#989258-60) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852 Links: AAVSO Info : https://www.aavso.org/category/tags/kic-8462852 Unofficial Page for Where's the Flux? Discovery Paper:  1509.03622.pdf (arxiv.org)

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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 - 2025-09-16 (T+61.0d) Image below (2025-09-16.903) was taken 61.0 days after discovery of Nova Ser 2025 Position of nova (fading) is shown by white cross-hairs Measured Magnitude +14.86 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-16 21:44 UT (#1363051-55) 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 2022ugz - Transient (non-detection)

AT 2022ugz (Delphinus) AT 2022ugz (Type: unk) discovered 2022-09-15.165 UT by ZTF using Palomar 1.2m Oschin Telescope Alias: ZTF22abfuwum, Gaia22dzd Discovery Magnitude 15.7 (g-ZTF Filter) vs Prior Non-Detection Limiting Magnitude 19.32  ( TNS 2022ugz | Gaia22dzd )

AT 2022ugz - 2025-09-16 (T+1097.8d) Image below (2025-09-16.978) was taken 1097.8 days after discovery of 2022ugz Position of reported transient (not visible) is indicated by white cross-hairs.

Annotated CCD Image (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-09-16 23:35 UT (#1363125-28) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022ugz on Transients 2022 Page >>

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AT 2022wxa - Transient  (non-detection)

AT 2022wxa (Pegasus) AT 2022wxa (Type: unk) discovered 2022-10-05.224 UT by ZTF Alias: ZTF20aauoefo, PS22kcc Discovery Magnitude 16.16 (r-ZTF Filter) vs Prior Non-Detection Limiting Magnitude 20.56  ( TNS 2022wxa )

AT 2022wxa - 2025-09-16 (T+1077.8d) Image below (2025-09-16.993) was taken 1077.8 days after discovery of 2022wxa Position of earlier transient (no longer visible) is shown by white circle 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 2025-09-16 23:59 UT (#1363142-46) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022wxa on Transients 2022 Page >>

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AT 2022aefj - CV Type Transient (CM Del)

AT 2022aefj / CM Del (Delphinus) AT 2022aefj (Type: CV) discovered 2022-12-31.949 UT by Gaia Alias: Gaia23abj Discovery magnitude 15.10 (G-Gaia filter) vs Historic magnitude 13.91 +/- 0.20  SD Known CV CM Del dims by 1.5 mag  ( TNS 2022aefj | Gaia23abj )

AT 2022aefj - 2025-09-16 (T+990.0d) Image below (2025-09-16.963) was taken 990.0 days after discovery of 2022aefj Position of earlier reported transient (distinct) is shown by white cross-hairs Measured Magnitude +13.65 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-16 23:08 UT (#1363110-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022aefj on Transients 2022 Page >>

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AT 2025usz - Type Nova Transient

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AT 2025xdz - Type CV? Transient  (non-detection)

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AT 2025xea - Type CV? Transient

AT 2025xea (Aquila) AT 2025xea(Type: CV?) discovered 2025-09-09.637 UT by Ziyang Mai using C8HD F/7 Telescope Discovery magnitude 16.35 (Clear Filter) Possible CV in Aql  ( TNS 2025xea )

AT 2025xea - 2025-09-16 (T+7.3d) Image below (2025-09-16.919) was taken 7.3 days after discovery of 2025xea Position of reported transient (vey faint) is shown by white cross-hairs Measured Magnitude +17.48 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-09-16 22:11 UT (#1363076-79) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025xea on Transients 2025 Page >>

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

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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 with SN 2025vaw - 2025-09-16 (T+24.9d) Image below (2025-09-16.845) was taken 24.9 days after discovery of 2025vaw Position of reported supernova (faint, fading) 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 +15.89 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-09-16 20:24 UT (#1363014-17) 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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