(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 | 0.040732671 ± 0.000000057 |
| Inclination | 43.424148301 ± 0.000002418 ° |
| Longitude of ascending node | 200.217116 ± 0.000010 ° |
| Argument of perihelia | 129.100773 ± 0.000073 ° |
| Mean anomaly | 346.493044 ± 0.000070 ° |
| Orbital period | 12.01 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 12929_Periboea_nima_v4.bsp |
| Date of first observation | 1953-09-16 |
| Date of last observation | 2022-07-07 |
| Number of observations used in the fit | 2609 |
| Number of rejected observations | 18 |
| Number of DES observations | 13 |
| Number of MPC observations | 2613 |
| Number of unpublished observations | 1 |
| RMS of observations | 0.348 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.008 | 0.009 |
| 2022-07 | 0.021 | 0.018 |
| 2023-01 | 0.021 | 0.019 |
| 2023-07 | 0.034 | 0.025 |
| 2024-01 | 0.033 | 0.026 |
| 2024-07 | 0.039 | 0.027 |
| 2025-01 | 0.043 | 0.028 |
| 2025-07 | 0.040 | 0.022 |
| 2026-01 | 0.049 | 0.025 |
Ephemeris comparison
Difference between NIMAv4 and JPL45 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.