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Small-Body Orbital Elements
This page provides access to orbital elements for asteroids and comets
contained in JPL's small-body database.
Custom element tables are available using our small-body search engine
or as ASCII text files (generated within the last 24 hours).
CSV (comma-separated-values) format is available for output from the
small-body search engine facilitating custom formatting on your end.
All elements are in the heliocentric ecliptic J2000 reference frame.
Small-Body Search Engine
Use the small-body search engine
for custom formatting of orbital elements
and/or custom selection of elements and physical parameters.
Detailed information (including orbital elements) for a specific object
is available via the small-body database browser.
ASCII Files
Orbital elements below are available as fixed-format ASCII tables.
Asteroid elements are available as Keplerian elements while comet
elements use perihelion distance and time of perihelion passage
instead of semimajor axis and mean anomaly.
See the table column headings description below.
Magnitude parameters, H and G, are included in the asteroid tables.
If you need other parameters, you should use the
small-body search engine, mentioned above.
(The files above were updated on
2013-May-13 02:32 -0700.)
- 2010-Feb-25 NOTICE:
- Format for both asteroid and comet files was modified (slightly) by increasing
the number of columns for the Name field.
Numbered comet orbits should now match those available from the
small-body search engine.
Dual-designation objects 4015 Wilson-Harington and 2060 Chiron were removed
from the comet data file.
Sample Asteroid File Header
Num Name Epoch a e i w Node M H G Ref
------ ----------------- ----- ---------- ---------- --------- --------- --------- ----------- ----- ---- ----------
1 Ceres 55400 2.7653485 0.07913825 10.58682 72.58981 80.39320 113.4104434 3.34 0.12 JPL 30
2 Pallas 55400 2.7721532 0.23099956 34.84090 310.15094 173.12950 96.1482660 4.13 0.11 JPL 25
3 Juno 55400 2.6700912 0.25498122 12.98211 248.10807 169.91138 32.0960832 5.33 0.32 JPL 86
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Sample Comet File Header
Num Name Epoch q e i w Node Tp Ref
------------------------------------------- ------- ----------- ---------- --------- --------- --------- -------------- ------------
1P/Halley 49400 0.58597811 0.96714291 162.26269 111.33249 58.42008 19860205.89532 JPL J863/77
2P/Encke 55460 0.33586872 0.84833156 11.78308 186.54970 334.56582 20100806.50196 JPL K105/1
3D/Biela -9480 0.87907300 0.75129900 13.21640 221.65880 250.66900 18321126.61520 IAUCAT03
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