Table 2
Beginning and terminal heights observed by different techniques, basic atmospheric data, and radiants and orbital elements (J2000.0) of the EN120812 Perseid fireball.
| Type of camera | h B | h E | Length |
| (km) | (km) | (km) | |
|
|
|||
| Photographic all-sky | 116.0 | 79.2 | 58.7 |
| Photographic high-res | ... | 79.1 | 20.5 |
| Digital all-sky | 135.0 | 79.4 | 88.6 |
| Image-intensified video | 170.2 | 78.6 | 145.2 |
| Spectral video | 154.4 | 78.6 | 120.3 |
| Beginning | Max. light | Terminal | |
|
|
|||
| Height (km) | 170.18 ± 0.09 | 82.7 | 78.6 ± 0.03 |
| Velocity (km s-1) | 59.81 ± 0.05 | ... | 55 ± 1 |
| Long. (°E) | 14.4436 ± 0.0003 | 13.505 | 13.45656 ± 0.00008 |
| Lat. (°N) | 49.5036 ± 0.0002 | 48.785 | 48.74671 ± 0.00005 |
| Abs. mag (mag) | 3.0 ± 0.3 | − 9.7± 0.2 | − 1.0± 0.3 |
| Slope (deg) | 38.554 ± 0.007 | ... | 38.959 ± 0.007 |
| Duration (s) | 2.5 | ||
| Length (km) | 145.23 ± 0.06 | ||
| Initial mass (g) | 60 ± 10 | ||
| PE coefficient/type | − 5.48/IIIA | ||
| EN120812 | IAU MDC | 109P | ||
|
|
||||
| α R | (deg) | 46.756 ± 0.014 | ... | ... |
| δ R | (deg) | 59.552 ± 0.007 | ... | ... |
| v ∞ | (km s-1) | 59.81 ± 0.05 | ... | ... |
| α G | (deg) | 47.607 ± 0.014 | ... | ... |
| δ G | (deg) | 59.547 ± 0.007 | ... | ... |
| v G | (km s-1) | 58.61 ± 0.05 | ... | ... |
| v H | (km s-1) | 41.48 ± 0.05 | ... | ... |
| a | (AU) | 29 ± 3 | 25 | 26.3 |
| e | 0.967 ± 0.004 | 0.962 | 0.964 | |
| q | (AU) | 0.9545 ± 0.0002 | 0.952 | 0.958 |
| ω | (deg) | 151.90 ± 0.07 | 151.3 | 153.0 |
| Ω | (deg) | 140.41914 ± 0.00001 | 139.6 | 139.4 |
| i | (deg) | 110.89 ± 0.03 | 113.3 | 113.4 |
Notes. Heights and lengths for different techniques are rounded to 100 m. Mean orbit of the Perseid stream based on the data of the IAU Meteor Data Center Catalog of precise photographic orbits and the orbit of the parent comet 109P/Swift-Tuttle in the passage of 1992 are also presented.
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