(12929) Periboea
This object has a more recent orbit available here
Object
| Object | (12929) Periboea |
| Diameter(1) | 62 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 10.13 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 5.245265 ± 0.000000 au |
| Eccentricity | 0.040732755 ± 0.000000019 |
| Inclination | 43.424148895 ± 0.000000326 ° |
| Longitude of ascending node | 200.217122 ± 0.000001 ° |
| Argument of perihelia | 129.100716 ± 0.000012 ° |
| Mean anomaly | 346.493101 ± 0.000011 ° |
| Orbital period | 12.01 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 12929_Periboea_nima_v5.bsp |
| Date of first observation | 1953-09-16 |
| Date of last observation | 2023-08-11 |
| Number of observations used in the fit | 3231 |
| Number of rejected observations | 18 |
| Number of DES observations | 13 |
| Number of MPC observations | 2940 |
| Number of unpublished observations | 16 |
| RMS of observations | 0.122 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2023-01 | 0.009 | 0.002 |
| 2023-07 | 0.015 | 0.004 |
| 2024-01 | 0.015 | 0.005 |
| 2024-07 | 0.019 | 0.007 |
| 2025-01 | 0.021 | 0.010 |
| 2025-07 | 0.021 | 0.008 |
| 2026-01 | 0.026 | 0.012 |
| 2026-07 | 0.023 | 0.007 |
| 2027-01 | 0.031 | 0.009 |
Ephemeris comparison
Difference between NIMAv5 and JPL50 in right ascension (weighted by cos δ) and in declination.
Gray area represents the 1-σ uncertainty of NIMA ephemeris. Green dots represent the DES observations.