(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 | 9.90 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458200.5 |
| Semi major axis | 5.237573 ± 0.000001 au |
| Eccentricity | 0.039151965 ± 0.000000124 |
| Inclination | 43.452987256 ± 0.000006835 ° |
| Longitude of ascending node | 200.227385 ± 0.000012 ° |
| Argument of perihelia | 130.277105 ± 0.000161 ° |
| Mean anomaly | 213.645707 ± 0.000166 ° |
| Orbital period | 11.99 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 12929_1999TZ1_nima_v1.bsp |
| Date of first observation | 1953-09-16 |
| Date of last observation | 2018-07-19 |
| Number of observations used in the fit | 1318 |
| Number of rejected observations | 7 |
| Number of DES observations | 13 |
| Number of MPC observations | 1312 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.481 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.034 | 0.028 |
| 2018-07 | 0.034 | 0.028 |
| 2019-01 | 0.042 | 0.028 |
| 2019-07 | 0.049 | 0.035 |
| 2020-01 | 0.053 | 0.029 |
| 2020-07 | 0.070 | 0.042 |
| 2021-01 | 0.067 | 0.028 |
| 2021-07 | 0.095 | 0.039 |
| 2022-01 | 0.078 | 0.024 |
Ephemeris comparison
Difference between NIMAv1 and JPL24 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.