Table 1
Orbital and rotational parameters of 67P/C-Ga.
| Orbital parameters | Symbol | Value |
|---|---|---|
| Semimajor axis | a | 3.4643 AU |
| Eccentricity | e | 0.6411 |
| Inclination | i | 7.0457 degree |
| Longitude of ascending node | Ω | 50.1769 degree |
| Argument of perihelion | ω | 12.7115 degree |
| Mean anomaly | M0 | 180.0000 degreeb |
| Orbital period | Torb | 6.45 year |
| Mean motion | n | 0.1529 degree/day |
| Rotational parameters | Symbol | Value |
| Right Ascensionc | Ra | 69.54 degree |
| Declinationc | Dec | 64.11 degree |
| Rotation period | Trot | 12.40 hours |
Notes. aParameters are from the JPL Horizons Online Ephemeris System, https://ssd.jpl.nasa.gov/horizons. b The mean anomaly at epoch 2456068.9 JD, corresponding to May 12, 2012. c Right ascension and declination of the cometary nucleus’s spin axis direction, cited by Liu et al. (2023).
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