David's Astronomy Pages Images - Session 1359 (2025-09-08)

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Session Notes

364P/PANSTARRS - Comet  (non-detection) C/2022 N2 (PANSTARRS) - Comet C/2024 E1 (Wierzchos) - Comet C/2025 A6 (Lemmon) - Comet     Nova Cas 2021 - Nova (V1405 Cas) Nova Ser 2025 (V691 Ser)     AT 2024ger - Type YSO Transient AT 2024rqk - Type CV? Transient  (non-detection) AT 2024aexn - Transient  (non-detection) AT 2025jpj - CV Type Transient AT 2025usz - Type Nova Transient AT 2025vob - Type CV? Transient     M31 - Spiral Galaxy with EGN Type Transient AT 2025wwe     SN 2023mpz - Type II Supernova  (non-detection) SN 2025ugl - Type Ib-pec Supernova  (non-detection)     UGC 10809 & PGC 200345  - Galaxy with Type Ic-BL Supernova 2025vaw     Variable Stars (photometric monitoring) - RX And, Z And, T CrB, BL Lac, CY Lyr, GW Pr, RR Tau     Nearby Stars (astrometric monitoring) - HH And, 61 Cyg, Gliese 65, Groombridge 34, Teegardens Star

- All-night session (7.6 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 2025-09-08 >>           -

Observing Result

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364P/PANSTARRS - Comet  (non-detection)

364P/PANSTARRS - 2025-09-09 (passing through Auriga) Sun Distance 4.97 AU (receeding) Earth Distance 5.06 AU (756.9 million km) Expected position of comet (not visible) is shown by white circle		364P/PANSTARRS -  2025-09-09 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 13.23 arcsec/hr, Dec 4.29 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 6 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-09 03:48 UT (#1359241-48) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, square root scale, cropped) Image details as left
Images of 364P/PANSTARRS on Comets 2023 Page >>
Images of 364P/PANSTARRS on Comets 2024 Page >>
Images of 364P/PANSTARRS on Comets 2025 Page >>

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C/2022 N2 (PANSTARRS) - Comet

C/2022 N2 (PANSTARRS) - 2025-09-09 (passing through Taurus) Sun Distance 3.84 AU (receeding) Earth Distance 3.39 AU (506.7 million km)		C/2022 N2 (PANSTARRS) - 2025-09-09 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 14.96 arcsec/hr, Dec 7.39 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 6 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-09 02:25 UT (#1359183-89) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, square root scale, cropped) Image details as left
Images of C/2022 N2 (PANSTARRS) on Comets 2025 Page >>

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C/2024 E1 (Wierzchos) - Comet

C/2024 E1 (Wierzchos) - 2025-09-08 (passing through Corona Borealis) Sun Distance 2.44 AU (approaching) Earth Distance 2.55 AU (382.0 million km)		C/2024 E1 (Wierzchos) - 2025-09-08 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 14.55 arcsec/hr, Dec -67.64 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-08 20:35 UT (#1359005-07) 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) Image details as left
Images of C/2024 E1 (Wierzchos) on Comets 2025 Page >>

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C/2025 A6 (Lemmon) - Comet

C/2025 A6 (Lemmon) - 2025-09-09 (passing through Lynx) Sun Distance 1.36 AU (approaching) Earth Distance 1.78 AU (266.2 million km)		C/2025 A6 (Lemmon) - 2025-09-09 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 82.16 arcsec/hr, Dec 30.78 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-09 01:47 UT (#1359155-57) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, log scale, cropped) 15 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-09 01:54 UT (#1359155-69) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2025 A6 (Lemmon) on Comets 2025 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 - 2025-09-08 (T+53.0d) Image below (2025-09-08.890) was taken 53.0 days after discovery of Nova Ser 2025 Position of nova (distinct but fading) is shown by white cross-hairs Measured Magnitude +14.43 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-09-08 21:25 UT (#1359029-33) 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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Nova Cas 2021 - Nova (V1405 Cas)

Nova Cas 2021 (Cassiopeia) Nova in Cassiopeia discovered 2021-03-18.4236,  by Yuji Nakamura (Japan) Magnitude at discovery +9.6 (unfiltered CCD) AT2021hkn (Type: Nova) reported by 2021/03/30.055 UT by Gaia Alias: Gaia21bpe, AT2021hkn, V1405 Cas ( TNS 2021hkn | Gaia21bpe )

Nova Cas 2021 - 2025-09-09 (T+1635.6d) Image below (2025-09-09.052) was taken 1635.6 days after discovery of nova Position of nova (fading slowly) is shown by white cross hairs.   Measured magnitude +12.57 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 45s exposure (average combine), 3x3 binning, Clear Filter 2025-09-09 01:18 UT (#1359129-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 - Earlier Image, 2021-04-15 (T+27.7d) Image below (2021-04-15.083) was taken 27.7 days after after discovery of Nova Position of nova (bright) is shown by white cross hairs.   Measured magnitude +8.10 Note: star object is saturated and shows some blooming, mag is probably underestimated

CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-04-15 02:02 UT (#885141-44) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Cas 2021 on Novae 2021 Page >>

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AT 2024ger - Type YSO Transient

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AT 2024rqk - Type CV? Transient (non-detection)

AT 2024rqk (Pegasus) AT 2024rqk (Type: CV?) discovered 2024-08-08.245 UT by GEOTS Alias: GEOTS-Balaji-2024-017, TCP J22082848+3054338 Discovery Magnitude 16.5 (Clear Filter) vs Prior Non-Detection Limiting Magnitude 18.0  ( TNS 2024rqk )

AT 2024rqk - 2025-09-09 (T+396.8d) Image below (2025-09-09.031) was taken 396.8 days after discovery of 2024rqk Position of reported transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.2 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-09-09 00:54 UT (#1359113-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024rqk - Earlier Image, 2024-08-29 (T+20.8d) Image below (2024-08-29.031) was taken 20.8 days after discovery of 2024rqk Position of reported transient (very faint) is shown by white cross-hairs Measured Magnitude +18.49 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-08-29 00:53 UT (#1234013-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024rqk on Transients 2024 Page >>

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AT 2024aexn - Transient (non-detection)

AT 2024aexn (Vulpecula) AT 2024aexn (Type: unk) discovered 2024-12-25.205 UT by ATLAS using ATLAS Haleakala Telescope Alias: ATLAS24rug Discovery Magnitude 16.35 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 18.97  ( TNS 2024aexn )

AT 2024aexn - 2025-09-08 (T+257.7d) Image below (2025-09-08.925) was taken 257.7 days after discovery of 2024aexn Position of reported transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +19.8 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-09-08 22:19 UT (#1359049-52) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024aexn on Transients 2024 Page >>

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AT 2025jpj - CV Type Transient

AT 2025jpj (Lyra) AT 2025jpj (Type: CV) discovered 2025-05-03.765 UT by XOSS Alias: KATS25J001, TCP J18473499+2905579 Discovery Mag 16.39 (Clear Filter) CV candidate classified by XOSS  ( TNS 2025jpj )

AT 2025jpj - 2025-09-08 (T+128.1d) Image below (2025-09-08.900) was taken 128.1 days after discovery of 2025jpj Position of reported  transient (very faint) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.3 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-09-08 21:43 UT (#1359037-40) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2025jpj - Earlier Image, 2025-05-08 (T+4.3d) Image below (2025-05-08.056) was taken 4.3 days after discovery of 2025jpj Position of reported  transient (very faint) is shown by white cross-hairs Measured Magnitude +17.26 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-05-08 01:27 UT (#1321070-72) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025jpj on Transients 2025 Page >>

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AT 2025usz - Type Nova Transient

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AT 2025vob - Type CV? Transient

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M31 - Spiral Galaxy with EGN Type Transient AT 2025wwe

M31 with AT 2025wwe (Andromeda) AT 2025wwe (Type: EGN) discovered 2025-09-04.455 UT by ZTF using Palomar 1.2m Oschin Telescope Alias: ZTF25aborgma, PNV J00431125+4146081 Discovery Magnitude 17.86 (g-ZTF Filter) Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot  ( TNS 2025wwe )

Nova M31 2025wwe - 2025-09-08 (T+4.5d) Cam2 Reference Image Position of Nova M31 Nova M31 2025wwe (not visible in this wide view image) is shown by blue circle Limits of M31 Spiral Galaxy is shown by pale blue ellipse

Annotated CMOS Image (16% size) (10s exposure, 1x1 binning) 2025-09-08 22:46 UT TS 80mm APO, ZWO ASI178MC

Nova M31 2025wwe - 2025-09-08 (T+4.5d) Image below (2025-09-08.992) was taken 4.5 days after discovery of 2025wwe Position of Transient (faint) is shown by white cross-hairs

Annotated CCD Image (70% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-09-08 23:59 UT (#1359094-98) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2025wwe - 2025-09-08 (T+4.5d) Image below (2025-09-08.992) was taken 4.5 days after discovery of 2025wwe Position of reported transient (faint) is shown by white cross-hairs Measured Magnitude +17.20 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-09-08 23:59 UT (#1359094-98) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025wwe (in M31) on Transients 2025 Page >>

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SN 2023mpz - Type II Supernova (non-detection)

SN 2023mpz (Delphinus) Alias: In GALEXASC J202049.64+092955.3 SN 2023mpz (Type: II) discovered 2023-07-09.378 UT by ALeRCE Alias: ZTF23aaquhaz Discovery Magnitude 17.56 (g-ZTF Filter)  ( TNS 2023mpz )

SN 2023mpz - 2025-09-09 (T+792.6d) Image below (2025-09-09.009) was taken 792.6 days after discovery of 2023mpz Position of earlier SN (no longer visible) is indicated by white cross-hairs.

Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-09-09 00:22 UT (#1359101-05) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023mpz on Supernova 2023 Page >>

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SN 2025ugl - Type Ib-pec Supernova (non-detection)

SN 2025ugl (Eridanus) SN 2025ugl (Type: Ib-pec) discovered 2025-08-17.752 UT by GOTO Alias: GOTO25fxv Discovery Magnitude 16.72 (L-GOTO Filter) vs Prior Non-Detection Limiting Magnitude 18.7  ( TNS 2025ugl )

SN 2025ugl - 2025-09-09 (T+22.4d) Image below (2025-09-09.131) was taken 22.4 days after discovery of 2025ugl Position of reported SN (not visible) is indicated by white cross-hairs. Non-Detection Limiting Magnitude +17 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-09-09 03:17 UT (#1359223-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025ugl 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 with SN 2025vaw - 2025-09-08 (T+16.9d) Image below (2025-09-08.867) was taken 16.9 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 +15.61(Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-09-08 20:56 UT (#1359014-18) 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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