Comet C/1986 P1-A Wilson

Nongravitational nominal solution

   Observational arc:        1986 08 05 - 1989 04 11  
   Number of observations:   688  
   RMS:                      1.11 arcsec (1361 residuals used, 1.1% rejected residuals )

Heliocentric osculating orbit

  Epoch        Perihelion time   q             e            ω              Ω            i      
  1987 05 05   19870420.780693   1.19965105    1.00031319   238.307145     111.666056   147.119122      
                    ± 0.000054   0.00000056    0.00000315     0.000104       0.000060     0.000029       

  NG parameters:   
   A₁ = (1.7501  ± 0.0600) ×10^-8 AU/day²  
   A₂ = (0.00335 ± 0.02714)×10^-8 AU/day²  
   A₃ = 0 (assumed)

Barycentric nominal original orbit (at 250 AU from the Sun)

  Epoch        Perihelion time   q             e             ω             Ω            i      
  1688 05 11 1987 04 20.100152   1.19367382    0.99994987     238.197884   112.121119   147.179338       
                    ± 0.000097   0.00000087    0.00000236       0.000054     0.000041     0.000032     
   1/a_ori =  (+42.00 ± 1.97)×10^-6 AU^-1

Barycentric nominal future orbit (at 250 AU from the Sun)

  Epoch        Perihelion time   q             e             ω             Ω            i      
  2294 11 11   19870419.783953   1.20210995    0.99907772     238.317965   112.428992   147.190207     
                    ± 0.000120   0.00000173    0.00000282       0.000141     0.000040     0.000026       
   1/a_fut = (767.22 ± 2.35)×10^-6 AU^-1

In the 17th edition of the Catalogue of Cometary orbits (2008):

Nongravitational orbit (642 obs.) with A₁=1.8 10^-8 AU/day², A₂=0.1 10^-8 AU/day².

The same comet in some other internet sources:

JPL Small-Body Database

More details

Starting swarms of VCs...(heliocentric, osculating orbits)

Gravitational osculating swarm.

Nongravitational osculating swarm.

Original and future orbit at the 250 AU from the Sun.

Comet number 10 in the Table: Nongravitational Oort spike comets (26 objects)

	Name	GR (1/a)_ori [10^-8 AU/day²]	GR (1/a)_osc [10^-8 AU/day²] epoch [TT]	GR 1/a_fut [10^-8 AU/day²]	RMS_GR [arcsec]	NG (1/a)_ori [10^-8 AU/day²]	NG (1/a)_osc [10^-8 AU/day²] epoch [TT]	NG 1/a_fut [10^-8 AU/day²]	RMS_NG [arcsec]	NG parameters A₁ A₂ A₃ [10^-8 AU/day²] tau shift [day]
10	C/1986 P1 Wilson weighting	+9.53 ± 0.82	-325.55 ± 0.83 1987 05 05	735.14 ± 0.82	1.35	+42.00 ± 1.97	-261.07 ± 2.63 1987 05 05	767.22 ± 2.35	1.11	1.7501 ± 0.0600 0.00335 ± 0.02714

Note: in the following plots black denotes returning clones while red denotes escaping ones.The nominal solution is located at the center of the green circle. Each plot have a header where date of calculation and some other parameters are coded. Also numbers of returning (B=shown+omitted), escaping (C=shown+omitted) and all (T=shown+omitted) Vcs are shown.

Due to the complicated physical and dynamical behaviour of this comet we derived several different models of its motion. More information can be found in Section 5.3.4 of our Paper 1. Model BEFORE means past motion starting from NG osculating orbit based on observations before splitting event, model AFTER denotes orbits starting from GR osculating orbit based on observations after the splitting (the NG effects were indeterminable for data after splitting).