| Event |
| Date | 2024-08-16 |
| Asteroid | (28240) 1999 AP21 |
| Star | UCAC4 408-141709 |
| Asteroid magnitude | 16.96m |
| Star magnitude | 13.53m |
| Combined magnitude | 13.48m |
| Expected drop | 3.48m |
| Expected time | 20:20:32 UT ± 0.69 s |
| Expected duration | 0.82 s |
| 1-σ path width error | 0.26 |
| Star RUWE | 0.95 |
| Station |
| Observer | Leszek Benedyktowicz |
| Latitude | 50 04 07.89 |
| Longitude | 19 47 05.30 |
| Altitude | 238 m |
| Geodetic system | WGS84 |
| Nearest city | Balice |
| Result |
| Overal result | Positive |
| Start observation | 20:19:42 UT |
| End observation | 20:21:24 UT |
| Disappearance | 20:20:31.000 UT ± 0.30 s |
| Reappearance | 20:20:32.030 UT ± 0.13 s |
| Duration | 1.03 s |
| Plotcode | include observation |
| Technical data |
| Telescope | SCT 20/200 [cm] |
| Camera | ASI432mm |
| Exposure | 0.25 s |
| Observation method | Analogue & digital video |
| Time source | GPS |
| Signal noise ratio | 3.8 |
| Wind | 0 B |
| Temperature | 22°C |
| Transparency | Clear |
| Seeing | Steady |
| Additional information |
| Comment | |
| SODIS | View report (requires account) |
| OWC | View more details |
| Last modified | 2024-08-20 14:42:56 |
