Open Access
Table 1
Instrumental details for telescopes and CCD cameras.
| Parameters | 2.4 m (Lijiang station) | 1 m (Kunming station) | 0.8 m (Yaoan station) |
|---|---|---|---|
| Approximate focal length | 1920 cm | 1330 cm | 800 cm |
| Diameter of primary mirror | 240 cm | 100 cm | 80 cm |
| F ratio | 4.1 (after focal reducer) | 13.3 | 10.0 |
| Size of CCD array | 1900 × 1900 (effective) | 4096 × 4112 | 2048 × 2048 |
| Size of pixel | 13.5 μ× 13.5 μ | 15 μ × 15 μ | 13.5 μ× 13.5 μ |
| Approximate scale factor | 0″.283 px−1 | 0.″/233 px−1 | 0.″348 px−1 |
| Field of view | 9.′ × 9.′0 | 16.′0 × 16.′0 | 11.′8 × 11.′8 |
| IAU code | O44 | 286 | O49 |
| Observatory | Yunnan Observatory | Yunnan Observatory | Purple Mountain Observatory |
| Geodetic position | 100° 1′51′Ε, 26°42′32″Ν | 102°47′18″Ε, 25° 1′46″Ν | 101°10′51″E, 25°31′43″N |
| CCD frames observed | 60 | 82 | 321 |
| Exposure time | 100 s | 500 s | (300−600) s |
| Night(s) observed | 1 | 7 | 25 |
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