(1173) Anchises
This object has a more recent orbit available here
Object
Object | (1173) Anchises |
Diameter(1) | 99 km |
Dynamic class(1) | trojan |
Absolute magnitude | 8.90 |
G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
Epoch (Julian date) | 2456633.455055235 |
Semi major axis | 5.303868 ± 0.000000 au |
Eccentricity | 0.137567402 ± 0.000000014 |
Inclination | 6.914990954 ± 0.000000516 ° |
Longitude of ascending node | 283.908293 ± 0.000002 ° |
Argument of perihelia | 41.158117 ± 0.000004 ° |
Mean anomaly | 57.015743 ± 0.000004 ° |
Orbital period | 12.22 yr |
Ephemeris & Observations
Ephemeris version | NIMAv5 |
Observation file |
omc_ast_NIMAv5.txt |
bsp file | 1173_Anchises_nima_v5.bsp |
Date of first observation | 1930-10-17 |
Date of last observation | 2023-08-10 |
Number of observations used in the fit | 4443 |
Number of rejected observations | 27 |
Number of DES observations | 0 |
Number of MPC observations | 4108 |
Number of unpublished observations | 95 |
RMS of observations | 0.125 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 | 0.017 | 0.006 |
2024-01 | 0.013 | 0.005 |
2024-07 | 0.020 | 0.010 |
2025-01 | 0.017 | 0.008 |
2025-07 | 0.020 | 0.007 |
2026-01 | 0.021 | 0.008 |
2026-07 | 0.019 | 0.003 |
2027-01 | 0.024 | 0.004 |
Ephemeris comparison
Difference between NIMAv5 and JPL60 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.