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Images - Session 1306 (2025-03-28)
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29P/Schwassmann-Wachmann - Comet C/2023 A3 (Tsuchinshan-ATLAS) - Comet AT 2025la - Transient (non-detection) AT 2025lc - CV Type Transient AT 2025lr - Afterglow Type Transient (non-detection) AT 2025md - CV Type Transient, V1948 Cyg AT 2025euu - Type CV? Transient M99 - Spiral Galaxy (Pinwheel Nebula) NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw UGC 8239 - Spiral Galaxy with Type Ia Supernova 2025N - AT 2025esx, AT2025esy attempts failed (due to cloud/bad guiding)
- ESO 565-G19 w/SN2025efc attempt failed (due to cloud)
- LEDA 2155454 w/SN2025erh attempt failed (due to bad guiding)Variable Stars (photometric monitoring) - T CrB, BL Lac Nearby Stars (astrometric monitoring) - Barnards Star, DX Cnc, 61 Cyg
- Late night session (7.6hr) - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 2°C (min) - CCD Temperature: -20°/-25°C - Notes from 2025-03-28 >> -
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| 29P/Schwassmann-Wachmann - 2025-03-29 (passing through Leo) Sun Distance 6.27 AU (turning) Earth Distance 5.52 AU (826.2 million km) |
29P/Schwassmann-Wachmann - 2025-03-29 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -8.88 arcsec/hr, Dec 2.31 arcsec/hr) |
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| Annotated CCD Image (50% size, square root scale) 9 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-03-29 01:36 UT (#1306094-102) 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 |
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| 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 >> |
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| C/2023 A3 (Tsuchinshan-ATLAS) - 2025-03-29 (passing through Delphinus) Sun Distance 3.19 AU (receeding) Earth Distance 3.55 AU (530.3 million km) Poor quality image (single frame) Comet is barely visible |
C/2023 A3 (Tsuchinshan-ATLAS) - 2025-03-29 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -1.35 arcsec/hr, Dec 26.50 arcsec/hr) Poor quality image (single frame) |
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| Annotated CCD Image (50% size, square root scale) 30s exposure (single frame), 3x3 binning, Clear Filter 2025-03-29 03:56 UT (#1306178) 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) 30s exposure (single frame), 3x3 binning, Clear Filter 2025-03-29 03:56 UT (#1306178) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2024 Page >> | ||
| Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2025 Page >> |
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| AT 2025la (Cygnus) AT 2025la (Type: unk) discovered 2025-01-11.109 UT by Gaia Alias: Gaia25acy Discovery Magnitude 16.89 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.34 [ TNS 2025la | Gaia25acy ] |
| AT 2025la - 2025-03-29 (T+77.0d) Image below (2025-03-29.101) was taken 77.0 days after discovery of 2025la Positon of earlier transient (very faint ?) is shown by white cross hairs. Non-Detection Limiting Magnitude +18.5 (Clear Filter) |
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| Annotated CCD Image (100% size, linear scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-29 02:30 UT (#1306130-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2025la - Detail, 2025-03-29 (T+77.0d) Image below (2025-03-29.101) was taken 77.0 days after discovery of 2025la Positon of earlier transient (not visible) is shown by white cross hairs. Non-Detection Limiting Magnitude +18.5 (Clear Filter) The detailed image below when compared with reference images in Aladin show that the earlier transient is not visible. The fuzzy blob just left and above the A2025la location is galaxy WISEA J212348.12+284231.1 The object just to left of the A2025la location is a faint star (and is not AT2025la) |
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| Annotated CCD Image (100% size, linear scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-29 02:30 UT (#1306130-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2025la on Transients 2025 Page >> |
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AT 2025lc (Cygnus) AT 2025lc (Type: CV) discovered 2025-01-10.553 UT by Gaia Alias: Gaia25add Alerting Magnitude 14.48 (G-Gaia Filter) vs Historic Magnitude 15.89 +/- 0.61 SD Outburst in candidate CV ( TNS 2025lc | Gaia25add ) |
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AT 2025lc - 2025-03-29 (T+77.5d) Image below (2025-03-29.076) was taken 77.5 days after discovery of 2025lc Position of earlier transient (very faint) is shown by white cross-hairs Estimated Magnitude +15.9 (Clear Filter) Star faded and is again at low-state. |
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Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-03-29 01:53 UT (#1306105-09) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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AT 2025lc - Earlier Image, 2025-03-15 (T+63.5d) Image below (2025-03-15.080) was taken 63.5 days after discovery of 2025lc Position of earlier transient (faint) is shown by white cross-hairs Measured Magnitude +13.69 (Clear Filter) Appears to be either still be in outburst (from Jan 10th) or has started a new outburst. |
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Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-03-15 01:58 UT (#1301164-68) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2025lc on Transients 2025 Page >> |
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| AT 2025lr (Crater) AT 2025lr (Type: Afterglow) discovered 2025-01-14.316 UT by MASTER Alias: MASTER OT J110618.40-150641.1, GRB 250114A Discovery Magnitude 15.9 (? Filter) vs Prior Non-Detection Limiting Magnitude 19.7 Remarks: GRB 250114A optical counterpart [ TNS 2025lr ] |
| AT 2025lr - 2025-03-28 (T+73.6d) Image below (2025-03-28.915) was taken 73.6 days after discovery of 2025lr Positon of reported transient (faded & no longer visible) is shown by white circle Non-Detection Limiting Magnitude +19.0 (Clear Filter) |
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| Annotated CCD Image (100% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-28 22:01 UT (#1306039-40) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2025lr on Transients 2025 Page >> |
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AT 2025md (Cygnus) AT 2025md (Type: CV) discovered 2025-01-12.882 UT by Gaia Alias: Gaia25adm, V1948 Cyg Alerting Magnitude 13.47 (G-Gaia Filter) vs Historic Magnitude 14.94 +/- 0.65 SD Outburst in known CV named V1948 Cyg ( TNS 2025md | Gaia25adm ) |
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AT 2025md - 2025-03-29 (T+75.2d) Image below (2025-03-29.085) was taken 75.2 days after discovery of 2025md Position of earlier transient (faint but distinct) is shown by white cross-hairs Measured Magnitude +15.49 (Clear Filter) |
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Annotated CCD Image (150% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, Clear Filter 2025-03-29 02:05 UT (#1306112-15) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2025md / V1948 Cyg on Transients 2025 Page >> |
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| AT 2025euu (Perseus) AT 2025euu (Type: CV?) discovered 2025-03-19.629 UT by XOSS Alias: KATS25F011, TCP J03453451+4157182 Discovery Magnitude 13.84 (Clear Filter) ( TNS 2025euu ) |
| AT 2025euu - 2025-03-28 (T+9.3d) Image below (2025-03-28.946) was taken 9.3 days after discovery of 2025euu Position of reported transient (barely separable) is shown by white cross-hairs |
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| Annotated CCD Image (100% size, linear scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2025-03-28 22:42 UT (#1306051) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| AT 2025euu - Detail, 2025-03-28 (T+9.3d) Position of reported transient (barely separable) is shown by white cross-hairs Estimated Magnitude +15.2 (Clear Filter) |
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| Annotated CCD Image (200% size, linear scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2025-03-28 22:42 UT (#1306051) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2025euu on Transients 2025 Page >> |
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| M99 (Coma Berenices) [ Messier Objects ] |
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| Annotated CCD Image (50% size, square root scale) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-29 00:13 UT (#1306065-66) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| Annotated CCD Image (125% size, square root scale, cropped) Image details as above |
| M99 - Detail |
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| Annotated CCD Image (125% size, square root scale, cropped) Image details as above |
| M99 - Earlier Image (Nov 2009) |
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| CCD Image (linear scale, cropped) 4 x 1 min exposure (average combine), 3x3 binning, C Filter 2009-11-27 06:02 h UT (#400217-21) 12" LX200R (at f/5.7) + ST-10XME |
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NGC 5957 with SN 2025fvw (Serpens) |
| NGC 5957 - Spiral Galaxy with SN 2025fvw (T+2.2d) |
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Annotated CCD Image (50% size, square root scale) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-29 01:03 UT (#1306079-83) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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NGC 5957 with SN 2025fvw - 2025-03-29 (T+2.2d) Image below (2025-03-29.038) was taken 2.2 days after discovery of 2025fvw Position of reported supernova (distinct) is shown by white cross-hairs Measured Magnitude +15.71 (Clear Filter) |
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Annotated CCD Image (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-29 01:03 UT (#1306079-83) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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NGC 5957 - Reference Image Location of the reported supernova (2025fvw) is shown by a magneta cross (faint) No object is evident at the location |
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Reference Image - DSS2 Color Image prepared and captured from Aladin |
| Images of SN 2025fvw (in NGC 5957) on Supernova 2025 Page >> |
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UGC 8239 with SN 2025N (Canes Venatici) |
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UGC 8239 with SN 2025N - 2025-03-29 (T+85.4d) Image below (2025-03-29.024) was taken 85.4 days after discovery of 2025N Position of reported supernova (very faint) is shown by white cross-hairs |
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Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-03-29 00:41 UT (#1306073-76) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2025N (in UGC 8239) on Supernovae 2025 Page >> |
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| This Web Page: | Images - Session 1306 (2025-03-28) |
| Last Updated : | 2025-04-11 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
