(2060) Chiron
Ephemeris solution
- Observations used : MPC (1895-2018) + OPD (2014.07,GDR1) + OPD (2014.09,GDR1)+ ESO (2015.11,GDR2) + OCC (1993.11.07,GDR2) + OCC (2011.11.29,GDR2) + Calar Alto (2017.06,GDR1) + OPD (2017.07,GDR1) + OPD (2018.07,GDR2)
- Observations not used : OCC (1994.03.09,GDR1) because not an occultation by the body + Calar Alto (2014.07) + PdM (2015.10) because of bad O-C.
- Observations and residuals file : omc_ast.res
- bsp file : 2060_Chiron_nima_v9.bsp
- Ephemeris file : ephembsp.res
- Ephemeris version : v9
- Comments : This is an update version of v8 version with additional observations from MPC + OPD (2018.07,GDR2) and new reduction of Occultations
- Date of creation : 2018-09-27 08:50 (UTC)
Orbit quality
|
time
|
+0
|
+6
|
+12
|
+18
|
+24
|
|
σ (α)
|
0.019
|
0.018
|
0.021
|
0.020
|
0.024
|
|
σ (δ)
|
0.015
|
0.016
|
0.017
|
0.017
|
0.019
|
Time is number of months after last observation (2018-07-09) and σ are in arcsec.
Residuals (O-C) with NIMA ephemeris
z scale (in colour) is the weight in arcsec used in the fitting process
O-C (NIMA) 2013-2019
z scale (in colour) is the weight in arcsec used in the fitting process
NIMA-JPL (2012-2020)
Blue bullets are 'offset' observations not reduced with Gaia DR1, light blue are 'offset' observations reduced with Gaia DR1, green bullets are 'offset' observations reduced with Gaia DR2, red bullets are 'occultation' positions, light red bullets are 'occultation' positions reduced with Gaia DR1 and orange bullets are 'occultation' positions reduced with Gaia DR2.
Other plots
NIMA-JPL (1992-2020) -- v8 version
NIMA-JPL (1992-2020) -- v9 version : v8 + MPC + OPD (2018.07,GDR2) and new reduction of Occultations (GDR2) --adopted solution--
