(12929) 1999TZ1
This object has a more recent orbit available here
Object
| Object | (12929) 1999TZ1 |
| Diameter(1) | 62 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 10.00 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 5.242419 ± 0.000000 au |
| Eccentricity | 0.039103330 ± 0.000000028 |
| Inclination | 43.432570866 ± 0.000000592 ° |
| Longitude of ascending node | 200.228870 ± 0.000003 ° |
| Argument of perihelia | 128.568254 ± 0.000022 ° |
| Mean anomaly | 248.308674 ± 0.000021 ° |
| Orbital period | 12.00 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 12929_1999TZ1_nima_v3.bsp |
| Date of first observation | 1953-09-16 |
| Date of last observation | 2021-04-20 |
| Number of observations used in the fit | 2306 |
| Number of rejected observations | 17 |
| Number of DES observations | 13 |
| Number of MPC observations | 2103 |
| Number of unpublished observations | 1 |
| RMS of observations | 0.123 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.005 | 0.003 |
| 2021-07 | 0.005 | 0.003 |
| 2022-01 | 0.006 | 0.002 |
| 2022-07 | 0.012 | 0.004 |
| 2023-01 | 0.012 | 0.005 |
| 2023-07 | 0.020 | 0.008 |
| 2024-01 | 0.019 | 0.010 |
| 2024-07 | 0.024 | 0.012 |
| 2025-01 | 0.026 | 0.014 |
Ephemeris comparison
Difference between NIMAv3 and JPL39 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.