Table 3
Radiant and heliocentric orbit of the Geminid fireball EN131212_041259.
| Parameter | Unit | Fireball | Geminids |
|---|---|---|---|
| αR | (deg) | 114.457 ± 0.011 | |
| δR | (deg) | 33.220 ± 0.005 | |
| v∞ | (km s−1) | 35.75 ± 0.06 | |
| αG | (deg) | 113.188 ± 0.011 | 113.0 |
| δG | (deg) | 32.433 ± 0.006 | 32.4 |
| vG | (km s−1) | 34.16 ± 0.07 | 33.8 |
| vH | (km s−1) | 33.58 ± 0.04 | |
| a | (A.U.) | 1.315 ± 0.005 | 1.31 |
| e | − | 0.8930 ± 0.0008 | 0.889 |
| q | (A.U.) | 0.1407 ± 0.0005 | 0.145 |
| Q | (A.U.) | 2.490 ± 0.011 | |
| ω | (deg) | 324.77 ± 0.03 | 324.3 |
| Ω | (deg) | 261.3777 | 261.6 |
| i | (deg) | 23.67 ± 0.09 | 22.9 |
| P | (years) | 1.508 ± 0.009 | |
| TJ | − | 4.370 ± 0.016 |
Notes. Quantities with indices R, G, and H refer to the observed radiant, geocentric, and heliocentric velocities, respectively. The parameters a, e, q, Q, ω, Ω, and i represent the semi-major axis, eccentricity, perihelion distance, aphelion distance, argument of perihelion, longitude of the ascending node, and inclination, respectively. v∞ is the velocity before atmospheric entry. P is the orbital period. TJ is the Tisserand parameter with respect to Jupiter, which was used to classify the orbit type of the object. The last column are the median Geminid values from Jenniskens (2023). All angular entries are given for the standard equinox J2000.0.
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