(12929) Periboea
Object
| Object |
(12929) Periboea |
| Diameter(1) |
62 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
10.17 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460800.5 |
| Semi major axis |
5.254938 ± 0.000000 au |
| Eccentricity |
0.041525625 ± 0.000000017 |
| Inclination |
43.410950027 ± 0.000000327 ° |
| Longitude of ascending node |
200.213635 ± 0.000001 ° |
| Argument of perihelia |
132.220804 ± 0.000011 ° |
| Mean anomaly |
65.510765 ± 0.000010 ° |
| Orbital period |
12.05 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv7 |
| Observation file (documentation) |
omc_ast_NIMAv7.txt |
| bsp file |
12929_Periboea_nima_v7.bsp |
| Date of first observation |
1953-09-16 |
| Date of last observation |
2025-07-07 |
| Number of observations used in the fit |
4569 |
| Number of rejected observations |
19 |
| Number of DES observations |
13 |
| Number of MPC observations |
4279 |
| Number of unpublished observations |
16 |
| RMS of observations |
0.122 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.013 |
0.005 |
| 2024-07 |
0.016 |
0.007 |
| 2025-01 |
0.018 |
0.008 |
| 2025-07 |
0.018 |
0.007 |
| 2026-01 |
0.023 |
0.010 |
| 2026-07 |
0.020 |
0.006 |
| 2027-01 |
0.027 |
0.008 |
| 2027-07 |
0.021 |
0.004 |
| 2028-01 |
0.027 |
0.002 |
Ephemeris comparison
Difference between NIMAv7 and JPL61 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.
Previous NIMA versions