Nongravitational nominal solution

   Observational arc:        1989 12 06 - 1990 06 27  
   Number of observations:   281  
   RMS:                      1.28 arcsec (537 residuals used, 4.4% rejected residuals ) 

Heliocentric osculating orbit

  Epoch        Perihelion time   q             e            ω              Ω            i      
   1990 04 19  19900409.967504   0.349772053   1.00021591   61.575931      75.925341    58.956430      
                    ± 0.000033   0.000000525   0.00000309    0.000097       0.000017     0.000065        

  NG parameters:   
   A1 = (0.26749 ± 0.07290)×10-8 AU/day2  
   A2 = (0.03266 ± 0.02210)×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      
  1692 11 06   19900409.258092   0.34831385    0.99998577     61.664471    76.603855    58.984571  
                    ± 0.000128   0.00000156    0.00000344      0.000303     0.000017     0.000065       
   1/aori =  ( +40.84 ± 9.89)×10-6 AU-1  

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

  Epoch        Perihelion time   q             e             ω             Ω            i      
  2283 04 03   19900410.752338   0.34950188    1.00012895     61.613551    76.567680    58.881734   
                    ± 0.000035   0.00000087    0.00000190      0.000126     0.000016     0.000065        
   1/afut = (-368.96 ± 5.42)×10-6 AU-1  

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

Gravitational orbit (144 obs.) with 0 < 1/aori < 10-4 AU-1.


The same comet in some other internet sources:


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 12 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/afut
[10-8 AU/day2]
RMSGR

[arcsec]
NG
(1/a)ori
[10-8 AU/day2]
NG
(1/a)osc
[10-8 AU/day2]

epoch [TT]
NG
1/afut
[10-8 AU/day2]
RMSNG

[arcsec]
NG parameters
A1
A2
A3
[10-8 AU/day2]
tau shift [day]
12 C/1989 X1 Austin
weighting
+22.39 ± 2.07 -652.36 ± 2.07
1990 04 19
-365.62 ± 2.07 1.31 +40.84 ± 9.89 -617.28 ± 8.82
1990 04 19
-368.96 ± 5.42 1.28 2.6749 ± 0.0729
0.03266 ± 0.02210


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.

Past orbits, at previous perihelion for the returning VCs :

1989x1amz.png
Past, gravitational, asynchronous.
1989x1amsz.png
Past, gravitational, synchronous.


1989x1nmz.png
Past, nongravitational, asynchronous.
1989x1nmsz.png
Past, nongravitational, synchronous.


Future orbits, at escape border (no returning VCs) :

1989x1apsz.png
Future, gravitational.
1989x1npsz.png
Future, nongravitational.