David's Astronomy Pages
Images - Session 1351 (2025-08-25)
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CY Lyr - Dwarf Nova - Variable AT 2025sdf - CV Type Transient - Nova Ser 2025 & SN 2025taz attempts failed (due to cloud) Variable Stars (photometric monitoring) - CY Lyr Nearby Stars (astrometric monitoring) - Barnards Star
- Attempted all night session (1.8hr). Session ended early due to cloud/session suspension - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature : 15°C (min) - CCD Temperature: -5°/-10°C - Notes from 2025-08-25 >> -
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CY Lyr (Lyra) |
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| Annotated CCD Image (100% size, linear scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2025-08-25 21:45 UT (#1351039-41) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Cataclysmic Variables : CY Lyr |
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AT 2025sdf (Ophiuchus) |
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AT 2025sdf - 2025-08-25 (T+31.4d) Image below (2025-08-25.882) was taken 31.4 days after discovery of 2025sdf Position of reported transient (faint) is shown by white cross-hairs Measured Magnitude +15.85 (Clear Filter) Poor quality image (not centered due to cloud, single frame) |
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| Annotated CCD Image (100% size, linear scale, cropped) 60s exposure (single frame), 3x3 binning, Clear Filter 2025-08-25 21:10 UT (#1351007) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2025sdf on Transients 2025 Page >> |
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| This Web Page: | Images - Session 1351 (2025-08-25) |
| Last Updated : | 2025-08-27 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
