(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 | 10.10 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460600.5 |
| Semi major axis | 5.254594 ± 0.000000 au |
| Eccentricity | 0.041792031 ± 0.000000019 |
| Inclination | 43.414811621 ± 0.000000327 ° |
| Longitude of ascending node | 200.214846 ± 0.000001 ° |
| Argument of perihelia | 131.875281 ± 0.000011 ° |
| Mean anomaly | 49.450385 ± 0.000010 ° |
| Orbital period | 12.05 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv6 |
| Observation file |
omc_ast_NIMAv6.txt |
| bsp file | 12929_Periboea_nima_v6.bsp |
| Date of first observation | 1953-09-16 |
| Date of last observation | 2024-07-13 |
| Number of observations used in the fit | 3812 |
| Number of rejected observations | 19 |
| Number of DES observations | 13 |
| Number of MPC observations | 3522 |
| Number of unpublished observations | 16 |
| RMS of observations | 0.122 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2024-01 | 0.014 | 0.005 |
| 2024-07 | 0.018 | 0.007 |
| 2025-01 | 0.020 | 0.009 |
| 2025-07 | 0.020 | 0.008 |
| 2026-01 | 0.025 | 0.011 |
| 2026-07 | 0.022 | 0.007 |
| 2027-01 | 0.029 | 0.008 |
| 2027-07 | 0.023 | 0.004 |
| 2028-01 | 0.030 | 0.002 |
Ephemeris comparison
Difference between NIMAv6 and JPL55 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.