C/1925 F1 Shajn-Comas Sola
more info
Comet C/1925 F1 was discovered on 22 March 1925, more than five months before perihelion passage, and was last seen on 4 March 1927 [Kronk, Cometography: Volume 3].
This comet made its closest approach to the Earth on 25 March 1925 (3.42 au), that is about three days after its discovery; it has second close approach to the Earth on 27 January 1926 (3.48 au).
Solution given here is based on data spanning over 1.95 yr in a range of heliocentric distances from 4.41 au through perihelion (4.18 au) to 6.07 au.
This Oort spike comet suffers slight planetary perturbations during its passage through the planetary system that lead to a slightly more tight future orbit in comparison to original one.
More details in Królikowska et al. 2014 andKrólikowska and Dybczyński 2017.

solution description
number of observations 262
data interval 1925 03 23 – 1927 03 04
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 4.41 au – 4.18 au (perihelion) – 6.07 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 463
RMS [arcseconds] 2.75
orbit quality class 1b
orbital elements (heliocentric ecliptic J2000)
Epoch 1925 09 07
perihelion date 1925 09 06.94156400 ± 0.00396300
perihelion distance [au] 4.18078079 ± 0.00002336
eccentricity 1.00243417 ± 0.00003527
argument of perihelion [°] 205.759883 ± 0.000570
ascending node [°] 358.539358 ± 0.000095
inclination [°] 146.713185 ± 0.000143
recip semi-major axis [10-6 au-1] -582.23 ± 8.43
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