(90377) Sedna

Ephemeris solution

Orbit quality

time +0 +6 +12 +18 +24
σ (α) 0.035 0.075 0.047 0.084 0.065
σ (δ) 0.027 0.035 0.032 0.040 0.038

Time is number of months after last observation (2016-02-19) 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) 2013-2020


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 (2012-2021) -- v5 version


NIMA-JPL (2012-2021) -- v6 version : v5 + ESO (2015.11,GDR2) and new reduction of ESO and OCC with GaiaDR2 --adopted solution--