C/2010 U3 Boattini
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Comet C/2010 U3 was discovered on 31 October 2010 by Andrea Boattini (Mt Lemmon). Several prediscovery images of this comet were found: taken at Mauna Kea on 18 and 30 October 2006 and 5 November 2005. At the moment of discovery, it was more than 8 years before its perihelion passage (see figure). In 2020, this comet is still observed.
Comet had its closest approach to the Earth on 27 January 2019 (7.929 au, one  months before perihelion).
Solution given here is based on pre-perihelion data spanning over by 14.25 yr in a range of heliocentric distances: 25.75 au  au – 8.446 au (perihelion) – 8.68 au (3 February 2020).
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system.

solution description
number of observations 2144
data interval 2005 11 05 – 2020 02 03
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 25.75 au – 8.48 au (perihelion) – 8.68 au
detectability of NG effects in the comet's motion NG effects not determinable
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 4256
RMS [arcseconds] 0.58
orbit quality class 1a+
orbital elements (heliocentric ecliptic J2000)
Epoch 2019 04 27
perihelion date 2019 02 26.59969393 ± 0.00111167
perihelion distance [au] 8.44553400 ± 0.00000529
eccentricity 0.99817388 ± 0.00000239
argument of perihelion [°] 88.086107 ± 0.000065
ascending node [°] 43.065623 ± 0.000008
inclination [°] 55.511779 ± 0.000005
recip semi-major axis [10-6 au-1] 216.22 ± 0.28
Upper panel: Time distribution of positional observations with corresponding heliocentric (red curve) and geocentric (green curve) distance at which they were taken. The horizontal dotted line shows the perihelion distance for a given comet whereas vertical dotted line - the moment of perihelion passage.
Lower panel (panels): O-C diagram for this(two) solution (solutions) given in this database, where residuals in right ascension are shown using magenta dots and in declination by blue open circles.