(2357) Phereclos
Object
| Object |
(2357) Phereclos |
| Diameter(1) |
95 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
9.02 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460600.5 |
| Semi major axis |
5.226596 ± 0.000000 au |
| Eccentricity |
0.046471858 ± 0.000000045 |
| Inclination |
2.669870101 ± 0.000001147 ° |
| Longitude of ascending node |
179.166078 ± 0.000113 ° |
| Argument of perihelia |
77.578167 ± 0.000126 ° |
| Mean anomaly |
115.336650 ± 0.000052 ° |
| Orbital period |
11.95 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv7 |
| Observation file (documentation) |
omc_ast_NIMAv7.txt |
| bsp file |
2357_Phereclos_nima_v7.bsp |
| Date of first observation |
1929-09-29 |
| Date of last observation |
2024-07-12 |
| Number of observations used in the fit |
4292 |
| Number of rejected observations |
21 |
| Number of DES observations |
0 |
| Number of MPC observations |
4297 |
| Number of unpublished observations |
16 |
| RMS of observations |
0.460 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 |
0.023 |
0.018 |
| 2024-07 |
0.030 |
0.020 |
| 2025-01 |
0.032 |
0.021 |
| 2025-07 |
0.032 |
0.016 |
| 2026-01 |
0.040 |
0.018 |
| 2026-07 |
0.034 |
0.009 |
| 2027-01 |
0.047 |
0.009 |
| 2027-07 |
0.034 |
0.003 |
| 2028-01 |
0.049 |
0.009 |
Ephemeris comparison
Difference between NIMAv7 and JPL76 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