David's Astronomy Pages Images - Session 1314 (2025-04-10)

Images (S1313)

Images Main

Home Page

Images (S1315)

Objects

Session Notes

29P/Schwassmann-Wachmann - Comet C/2023 A3 (Tsuchinshan-ATLAS) - Comet     AT 2023df - CV Type Transient (non-detection) AT 2023coi - Transient (non-detection) AT 2025yl - CV Type Transient AT 2025fma - Type CV? Transient AT 2025ghv - Type CV? Transient     ESO 565-G19 - Galaxy with Type Ia Supernova 2025efc     NGC 2565 - Spiral Galaxy with Transient AT 2025ccz (non-detection) NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw     UGC 10058 - Spiral Galaxy with Type II Supernova 2025gvs UGC 11097 - Spiral Galaxy with Transient AT 2024ajp (non-detection)     Variable Stars (photometric monitoring) - T CrB, CI Cyg, RZ LMi, TT Leo     Nearby Stars (astrometric monitoring) - CN Leo

- Attempted All-Night Session (5.7 hr), finished early due to pre-dawn cloud     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 5°C (min) - CCD Temperature: -15°/-20°C - Notes from 2025-04-10 >>     - Aurora Images from 2025-04-10 / 2025-04-11  >>

Observing Result

Back to Top

29P/Schwassmann-Wachmann - Comet

29P/Schwassmann-Wachmann - 2025-04-10 (passing through Leo) Sun Distance 6.27 AU (turning ?) Earth Distance 5.68 AU (850.4 million km)		29P/Schwassmann-Wachmann - 2025-04-10 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -4.06 arcsec/hr, Dec 0.92 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 7 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-04-10 21:53 UT (#1314016-22) 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 29P/Schwassmann-Wachmann on Comets 2023 Page >>
Images of 29P/Schwassmann-Wachmann on Comets 2024 Page >>
Images of 29P/Schwassmann-Wachmann on Comets 2025 Page >>

Back to Top

C/2023 A3 (Tsuchinshan-ATLAS) - Comet

C/2023 A3 (Tsuchinshan-ATLAS) - 2025-04-11 (passing through Delphinus) Sun Distance 3.36 AU (receeding) Earth Distance 3.53 AU (528.6 million km)		C/2023 A3 (Tsuchinshan-ATLAS) - 2025-04-11 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -10.29 arcsec/hr, Dec 26.92 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-04-11 01:12 UT (#1314119-22) 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) 9 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-04-11 01:12 UT (#1314116-25) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2024 Page >>
Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2025 Page >>

Back to Top

AT 2023df - CV Type Transient (non-detection)

AT 2023df (Hercules) AT 2023df (Type: CV) discovered 2023-01-07.745 UT by Gaia using Gaia Spacecraft Telescope Alias: Gaia23adv Discovery Mag 14.36 (G-Gaia Filter) vs Historic Magnitude 20.20 +/- 0.68 Outburst in candidate CV  ( TNS 2023df | Gaia23adv )

AT 2023df - 2025-04-11 (T+824.3d) Image below (2025-04-11.000) was taken 824.3 days after discovery of 2023df Position of earlier transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.6 Star has likely returned to its normal state (mag 20.0 to 20.5 Gaia)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-04-11 00:03 UT (#1314087-91) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023df on Transients 2023 Page >>

Back to Top

AT 2023coi - Transient (non-detection)

AT 2023coi (Ophiuchus) AT 2023coi (Type: unk) discovered 2023-02-25.575 UT by ATLAS using ATLAS Haleakala Telescope Alias: ATLAS23cqu Discovery Mag 16.83 (cyan-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 18.47  ( TNS 2023coi )

AT 2023coi - 2025-04-11 (T+775.5d) Image below (2025-04-11.089) was taken 775.5 days after discovery of 2023coi Position of earlier transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.6

Annotated CCD Image (100% size, linear scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-11 02:11 UT (#1314142-43) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023coi on Transients 2023 Page >>

Back to Top

AT 2025yl - CV Type Transient

AT 2025yl (Leo) AT 2025yl (Type: CV) discovered 2025-01-20.298 UT by MASTER Alias: MASTER OT J103147.97+085224.6 Discovery Mag 16.83 (cyan-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 18.47  ( TNS 2025yl )

AT 2025yl - 2025-04-10 (T+80.6d) Image below (2025-04-10.929) was taken 80.6 days after discovery of 2025yl Position of earlier transient (very faint) is shown by white cross-hairs Estimated Magnitude +18.6

Annotated CCD Image (100% size, square root scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-04-10 22:22 UT (#1314031-35) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025yl on Transients 2025 Page >>

Back to Top

AT 2025fma - Type CV? Transient

AT 2025fma (Cepheus) AT 2025fma (Type: CV?) discovered 2025-03-18.947 UT by XOSS Alias: KATS25F031, TCP J20412701+6308245 Discovery Mag 16.08 (Clear Filter) CV candidate classified by XOSS  ( TNS 2025fma )

AT 2025fma - 2025-04-11 (T+23.1d) Image below (2025-04-11.057) was taken 23.1 days after discovery of 2025fma Position of earlier transient (faint) is shown by white cross-hairs Measured Magnitude +18.25

Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-11 01:31 UT (#1314128-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025fma on Transients 2025 Page >>

Back to Top

AT 2025ghv - Type CV? Transient

AT 2025ghv (Gemini) AT 2025ghv (Type: CV?) discovered 2025-03-31.589 UT by XOSS Alias: PSP25H, TCP J06455595+1210577 Discovery Magnitude 14.88 (Clear Filter)  ( TNS 2025ghv )

AT 2025ghv - 2025-04-10 (T+10.4d) Image below (2025-04-10.941) was taken 10.4 days after discovery of 2025ghv Position of reported transient (very faint, fading) is shown by white cross-hairs

Annotated CCD Image (175% size, linear scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-10 22:41 UT (#1314041-43) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025ghv on Transients 2025 Page >>

Back to Top

ESO 565-G19 - Galaxy with Type Ia Supernova 2025efc

Back to Top

NGC 2565 - Spiral Galaxy with Transient AT 2025ccz  (non-detection)

Back to Top

NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw

Back to Top

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 - 2025-04-11 (T+5.5d) Image below (2025-04-11.009) was taken 5.5 days after discovery of 2025gvs Position of reported supernova (distinct) is shown by white cross-hairs Measured Magnitude +15.91 (Clear Filter)

Annotated CCD Image (175% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-11 00:22 UT (#1314094-98) 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 >>

Back to Top

UGC 11097 - Spiral Galaxy with Transient AT 2024ajp  (non-detection)

UGC 11097 with AT 2024ajp (Hercules) AT 2024ajp (Type: unk) discovered 2024-01-11.771 UT by Gaia Alias: Gaia24agd Discovery Mag 17.73 (G-Gaia Filter) Candidate SN near galaxy UGC 11097  ( TNS 2024ajp | Gaia24agd )

UGC 11097 - Spiral Galaxy

Annotated CCD Image (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-11 01:53 UT (#1314135-39) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 11097 with AT 2024ajp - 2025-04-11 (T+455.3d) Image below (2025-04-11.073) was taken 455.3 days after discovery of 2024ajp Position of earlier transient (not visible, most-probably faded) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-11 01:53 UT (#1314135-39) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024ajp (in UGC 11097) on Transients 2024 Page >>

Back to Top