(319) Leona
Object
| Object |
(319) Leona |
| Diameter(1) |
66 km |
| Dynamic class(1) |
mba |
| Absolute magnitude |
10.27 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460200.5 |
| Semi major axis |
3.411967 ± 0.000000 au |
| Eccentricity |
0.215155014 ± 0.000000045 |
| Inclination |
10.563584030 ± 0.000001876 ° |
| Longitude of ascending node |
184.862132 ± 0.000011 ° |
| Argument of perihelia |
227.049525 ± 0.000015 ° |
| Mean anomaly |
7.561729 ± 0.000007 ° |
| Orbital period |
6.30 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv4 |
| Observation file (documentation) |
omc_ast_NIMAv4.txt |
| bsp file |
319_Leona_nima_v4.bsp |
| Date of first observation |
1891-10-09 |
| Date of last observation |
2023-09-16 |
| Number of observations used in the fit |
3048 |
| Number of rejected observations |
1153 |
| Number of DES observations |
0 |
| Number of MPC observations |
4194 |
| Number of unpublished observations |
7 |
| RMS of observations |
0.234 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) |
| 2023-01 |
0.022 |
0.008 |
| 2023-07 |
0.007 |
0.002 |
| 2024-01 |
0.008 |
0.010 |
| 2024-07 |
0.011 |
0.007 |
| 2025-01 |
0.022 |
0.012 |
| 2025-07 |
0.018 |
0.008 |
| 2026-01 |
0.019 |
0.006 |
| 2026-07 |
0.022 |
0.005 |
| 2027-01 |
0.019 |
0.003 |
Ephemeris comparison
Difference between NIMAv4 and JPL70 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.