Data Available from the Minor Planet Center

If using these or any other data files, or a webtool from the MPC, for your research publication, we would appreciate it if you could thank us in the acknowledgements section. This will help us track the use of MPC data and services in publications, which will be of interest to funding agencies. Please use the following snippet:

This research has made use of data and/or services provided by the International Astronomical Union's Minor Planet Center.

The tables below contain a partial list of data files provided by the Minor Planet Center.

Orbits

File Description Update frequency Last Update (UT) Documentation
MPCORB.DAT MPCORB.DAT.gz Orbits for all asteroids in the MPC database Daily 2024/04/12 12:38 Export Format for Minor-Planet Orbits
Extended MPCORB Data Format Manual (PDF)
mpcorb_extended.dat.gz
mpcorb_extended.json.gz
NEA.txt Orbits for Near Earth Asteroids (NEAs) When new NEAs are designated
(Few times a day)
2024/04/12 13:15 Export Format for Minor-Planet Orbits
Extended MPCORB Data Format Manual (PDF)
nea_extended.dat.gz
nea_extended.json.gz
PHA.txt Orbits for Potentially Hazardous Asteroids (PHAs) When new PHAs are designated
(Several times a week)
2024/04/13 08:11 Export Format for Minor-Planet Orbits
Extended MPCORB Data Format Manual (PDF)
pha_extended.dat.gz
pha_extended.json.gz
DAILY.DAT Orbits from the latest DOU MPEC Daily 2024/04/12 12:38 Export Format for Minor-Planet Orbits
Extended MPCORB Data Format Manual (PDF)
daily_extended.dat.gz
daily_extended.json.gz
Distant.txt Orbits for TNOs, Centaurs and SDOs Daily 2024/04/12 12:38 Export Format for Minor-Planet Orbits
Extended MPCORB Data Format Manual (PDF)
distant_extended.dat.gz
distant_extended.json.gz
Unusual.txt Orbits for asteroids with e ≥ 0.5 or q > 6 AU Daily 2024/04/12 12:38 Export Format for Minor-Planet Orbits
Extended MPCORB Data Format Manual (PDF)
unusual_extended.dat.gz
unusual_extended.json.gz
CometEls.txt Orbits for current comets in the MPC database When new Comets are designated
(Few times a month)
2024/04/12 13:13 Export Format for Comet Orbits
cometels.json.gz

File Description Update frequency Last Update (UT) Documentation
NEAs today + 15 days
NEAs today + 14 days
NEAs today + 13 days
NEAs today + 12 days
NEAs today + 11 days
NEAs today + 10 days
NEAs today + 9 days
NEAs today + 8 days
NEAs today + 7 days
NEAs today + 6 days
NEAs today + 5 days
NEAs today + 4 days
NEAs today + 3 days
NEAs today + 2 days
NEAs today + 1 days
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Elements of NEAs for current epochs plus up to 15 days Daily 2024/04/13 08:21 Export Format for Minor-Planet Orbits
Extended MPCORB Data Format Manual (PDF)
NEAs today .dat.gz .json.gz Elements of NEAs for current epochs today Daily 2024/04/13 08:12 Export Format for Minor-Planet Orbits
Extended MPCORB Data Format Manual (PDF)
NEAs today - 1 days
NEAs today - 2 days
NEAs today - 3 days
NEAs today - 4 days
NEAs today - 5 days
NEAs today - 6 days
NEAs today - 7 days
NEAs today - 8 days
NEAs today - 9 days
NEAs today - 10 days
NEAs today - 11 days
NEAs today - 12 days
NEAs today - 13 days
NEAs today - 14 days
NEAs today - 15 days
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Elements of NEAs for current epochs minus up to 15 days Daily 2024/04/13 08:16 Export Format for Minor-Planet Orbits
Extended MPCORB Data Format Manual (PDF)


NEO Confirmation Page (NEOCP)

File Description Update frequency Last Update (UT) Documentation
neocp.txt Objects awaiting further observations to confirm as NEOs When new objects or observations are submitted
(Many times a night)
2024/04/13 08:20 Format of NEOCP file
neocp.json


Identifications

The 3 individual ID files that have been available for over two decades are now also offered merged as a single JSON file. Note that the JSON file comes in two flavours: with packed designations or unpacked. Choose wisely.

File Description Update frequency Last Update (UT) Documentation
numids.txt mpc_ids.json.gz
mpc_ids_packed.json.gz
Provisional designation(s) in packed form for all numbered objects that have one (or more) extra designations Monthly
(After publication of the MPCs)
2024/04/12 20:21 Format of identification files
ids.txt Provisional designation(s) in packed form for multi-opposition objects
dbl.txt Provisional designation(s) in packed form for single-opposition objects

Daily Identifications

File Description Update frequency Last Update (UT) Documentation
newnumids.dat New numbered identifications with unnumbered minor planets Daily 2024/04/12 12:39 Format of daily identification files
newunnumids.dat New unnumbered identifications


Observatory Codes

File Description Update frequency Last Update (UT) Documentation
ObsCodes.html Observatory Codes appointed by the MPC When new ObsCodes are approved
(Several times a month)
2024/04/12 12:20 Format of observatory codes file
obscodes_extended.json.gz


Discoveries

File Description Update frequency Last Update (UT) Documentation
NumberedMPs.txt Discovery circumstances of the numbered minor planets Monthly
(After publication of the MPCs)
2024/02/27 20:36 Format of discovery circumstances file
numberedmps.json.gz


Close Approaches

File Description Update frequency Last Update (UT) Documentation
Closest.html Closest observed approaches of asteroids to Earth Currently Inactive 2019/05/16 12:30 Format of close approaches file
closest_extended.json.gz


Alterations to Observations (unpublished)

The following files are provisional files that detail the observations that will be altered and published during the next set of MPCs. Note that the files will be updated daily even if the content has not changed.

File Description Update frequency Last Update (UT) Documentation
redesigs.dat Observations that are to be redesignated Daily 2024/04/12 12:39 Documentation
todelete.dat Observations that are to be deleted
removed_obs.dat Observations removed from our public database Daily 2024/04/12 12:39 Observation Status Codes