Table 1
Keplerian orbital elements of comets C/1980 E1 (Bowell) and C/2024 L5 (ATLAS).
| Parameter | C/1980 E1 (Bowell) | C/2024 L5 (ATLAS) | |||
|---|---|---|---|---|---|
| Heliocentric | Barycentric | Heliocentric | Barycentric | ||
| Perihelion, q (au) | = | 3.363940±0.000003 | 3.355370 | 3.4320 ± 0.0006 | 3.4400 |
| Eccentricity, e | = | 1.057733 ± 0.000008 | 1.047673 | 1.0375 ± 0.0003 | 1.0352 |
| Inclination, i (°) | = | 1.66174 ± 0.00006 | 1.66170 | 166.5729 ± 0.0003 | 166.6027 |
| Longitude of the ascending node, Ω (°) | = | 114.557 ± 0.002 | 114.5621 | 139.166 ± 0.003 | 139.158 |
| Argument of perihelion, ω (°) | = | 135.083 ± 0.002 | 135.1432 | 290.52 ± 0.02 | 290.49 |
| Mean anomaly, M (°) | = | 359.84868 ± 0.00003 | 359.88609 | 359.730 ± 0.003 | 359.755 |
| MOID with Jupiter (au) | = | 0.0108537 | – | 0.00499388 | – |
| Total magnitude, M1 (mag) | = | 5.8 ± 1.0 | – | 6.6 ± 0.5 | – |
Noites. Values include the 1σ uncertainty. The orbit of C/1980 E1 (solution date, April 15, 2021, 23:29:29 PST) is referred to epoch JD 2444972.5, which corresponds to 00:00 on 1982 January 3 TDB (Barycentric Dynamical Time, J2000.0 ecliptic and equinox) and it is based on 187 observations with a data-arc span of 2514 d. The orbit of C/2024 L5 (solution date, September 11, 2024, 13:42:21 PDT) is referred to epoch JD 2460504.5, which corresponds to 00:00 on 2024 July 13 TDB and it is based on 215 observations with a data-arc span of 82 d. Source: JPL’s SBDB.
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