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High-eccentricity targets from JPL-H as MPC_COMET #1337

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High-eccentricity targets from JPL-H as MPC_COMET #1337

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High-eccentricity targets from JPL-H as MPC_COMET
Fingel Oct 30, 2025
47cf9fa
Merge branch 'dev' into 1180-horizons-eccentricity
jchate6 Dec 1, 2025
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10 changes: 7 additions & 3 deletions tom_catalogs/harvesters/jplhorizons.py
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,13 @@ def query(self, term, location=None, start=None, end=None, step=None):
def to_target(self):
target = super().to_target()
target.type = 'NON_SIDEREAL'
target.scheme = 'MPC_MINOR_PLANET'
# Special case for ingesting asteroids as comets, see tom_base #1180
target.eccentricity = self.catalog_data['e'][0] # eccentricity in JPL
target.epoch_of_perihelion = self.jd_to_mjd(self.catalog_data['Tp_jd'][0]) # time of periapsis in JPL
if target.eccentricity > 0.9 and target.epoch_of_perihelion is not None and target.epoch_of_perihelion != 0:
target.scheme = 'MPC_COMET'
else:
target.scheme = 'MPC_MINOR_PLANET'
asteroid = True
if 'M1' in self.catalog_data.colnames and 'k1' in self.catalog_data.colnames:
asteroid = False
Expand All @@ -47,10 +53,8 @@ def to_target(self):
target.inclination = self.catalog_data['incl'][0] # inclination in JPL
target.mean_daily_motion = self.catalog_data['n'][0] # mean motion in JPL
target.semimajor_axis = self.catalog_data['a'][0] # semi-major axis in JPL
target.eccentricity = self.catalog_data['e'][0] # eccentricity in JPL
# epoch Julian Date in JPL
target.epoch_of_elements = self.jd_to_mjd(self.catalog_data['datetime_jd'][0])
target.epoch_of_perihelion = self.jd_to_mjd(self.catalog_data['Tp_jd'][0]) # time of periapsis in JPL
target.perihdist = self.catalog_data['q'][0] # periapsis distance in JPL
# undocumented in JPL astroquery column names -- presuming P is the orbital period in JPL
target.ephemeris_period = self.catalog_data['P'][0]
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