C/2011 M1 LINEAR
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Comet C/2011 M1 was discovered on 22 June 2011 during Lincoln Laboratory Near-Earth Asteroid Research project, that is 2.5 months before its perihelion passage. It was observed until 2 August 2011.
Comet had its closest approach to the Earth on 27 July 2011 (1.267 au), a bit more than a month after its discovery.
Solution given here is based on pre-perihelion data spanning over 0.112 yr in a range of heliocentric distances from 1.59 au to 1.10 au.
Original value of 1/a is negative; however within its uncertainty of about 3 sigma this comet can came from the Oort Cloud.
C/2011 M1 was observed only before peryhelion; future orbit is given here though it is not certin that this comet survived perihelion passage. See also Table 2 in Sekanina 2019.
See also Królikowska 2020.

solution description
number of observations 122
data interval 2011 06 22 – 2011 08 02
data type observed only before perihelion (PRE)
data arc selection entire data set (STD)
range of heliocentric distances 1.59 au – 1.1au
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 236
RMS [arcseconds] 0.72
orbit quality class 3a
orbital elements (barycentric ecliptic J2000)
Epoch 2283 05 13
perihelion date 2011 09 07.97652056 ± 0.01645516
perihelion distance [au] 0.89693388 ± 0.00018479
eccentricity 1.00248505 ± 0.00045423
argument of perihelion [°] 119.575094 ± 0.019131
ascending node [°] 324.848344 ± 0.003891
inclination [°] 70.173059 ± 0.000315
reciprocal semi-major axis [10-6 au-1] -2,770.61 ± 505.86
file containing 5001 VCs swarm
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.
Six 2D-projections of the 6D space of future swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.