(174567) Varda
Ephemeris solution
- Observations used : MPC (1980-2018) + ESO (2013.04,GDR2) + ESO (2013.05,GDR2) + OPD (2014.09) + OPD (2017.07,GDR1) + OPD (2018.07,GDR2) + OPD (2018.08,GDR2) + OPD (2018.09,GDR2) + SierraNevada (2018.09).
- Observations not used : MPC (2018) and MPC (2017) from W55 because bad residuals.
- Observations and residuals file : omc_ast.res
- bsp file : 174567_Varda_nima_v6.bsp
- Ephemeris file : ephembsp.res
- Ephemeris version : v6
- Comments : This is an update version of v5 version with additional observations from OPD (2018.09) and Sierra Nevada (2018.09). MPC observations from 2018 and from 2017 for W55 observatory are not taken into account because of bad O-C.
- Date of creation : 2018-09-08 17:01 (UTC)
Orbit quality
|
time
|
+0
|
+6
|
+12
|
+18
|
+24
|
|
σ (α)
|
0.045
|
0.095
|
0.053
|
0.112
|
0.066
|
|
σ (δ)
|
0.037
|
0.042
|
0.042
|
0.047
|
0.048
|
Time is number of months after last observation (2018-09-07) 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 (2012-2020) -- v5 version
NIMA-JPL (2012-2020) -- v6 version : v5 + OPD (2018.09) and Sierra Nevada (2018.09) --adopted solution--
