C/1976 U1 Lovas
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Comet C/1976 U1 was discovered on 27 October 1976, 3.7 months after its perihelion passage, and was last seen on 10 February 1978 [Kronk and Meyer, Cometography: Volume 5].
This comet made its closest approach to the Earth on 1 January 1977 (5.33 au), about 2 months after its discovery.
Solution given here is based on data spanning over 1.22 yr in a range of heliocentric distances from 5.94 au to 7.14 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (see future barycentric orbit).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.

solution description
number of observations 30
data interval 1976 11 22 – 1978 02 10
data type observed only after perihelion (POST)
data arc selection entire data set (STD)
range of heliocentric distances 5.94 au – 7.14au
detectability of NG effects in the comet's motion NG effects not determinable
type of model of motion GR - gravitational orbit
data weighting NO
number of residuals 60
RMS [arcseconds] 1.69
orbit quality class 1b
orbital elements (heliocentric ecliptic J2000)
Epoch 1976 07 01
perihelion date 1976 07 06.36224800 ± 0.03608300
perihelion distance [au] 5.85727320 ± 0.00014296
eccentricity 1.00388129 ± 0.00012609
argument of perihelion [°] 118.787189 ± 0.003919
ascending node [°] 286.037188 ± 0.000293
inclination [°] 86.631909 ± 0.000358
recip semi-major axis [10-6 au-1] -662.64 ± 21.51
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