Important note: this is a comet with the shortest observational arc (only 4 months) among 26 comets studied in Paper 1.

NG solution is very sensitive to data selection, especially the last four observations are crucial.

Nongravitational nominal solution


   Observational arc:        1989 08 24 - 1989 12 24  
   Number of observations:   231  
   RMS:                      1.30 arcsec (452 residuals used, 2.2% rejected residuals ) 

Heliocentric osculating orbit

  Epoch        Perihelion time   q             e            ω              Ω            i      
  1989 11 10   19891111.914664   0.64236124    1.00002499   150.564098    275.510766    90.146682        
                    ± 0.000138   0.00000070    0.00001665     0.000214      0.000275     0.000248         

  NG parameters:   
   A1 = (3.3963  ± 0.3166 )×10-8 AU/day2  
   A2 = (0.50594 ± 0.14935)×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      
  1691 10 03   19891110.997525   0.64067522    0.99996503    150.615125   275.483548    89.972889              
                    ± 0.000392   0.00000348    0.00001425      0.000450     0.000276     0.000251         
   1/aori =  (+42.90 ± 22.24)×10-6 AU-1  

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

  Epoch        Perihelion time   q             e             ω             Ω            i      
  2288 05 26   19891112.554362   0.64134280    0.99993982    150.503112   275.566667    90.139492              
                    ± 0.000172   0.00000894    0.00001752      0.001486     0.000276     0.000246         
   1/afut = ( +80.49 ± 27.32)×10-6 AU-1  

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

Nongravitational orbit (180 obs.) with A1 = +3.4 ×10-8 AU/day2 and A2 = +0.6 ×10-8 AU/day2


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 11 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]
11 C/1989 Q1 Okazaki-Levy-Rudenko
weighting
-12.14 ± 14.02 -256.94 ± 13.88
1989 11 10
182.62 ± 14.02 1.84 +42.90 ± 22.24 -38.90 ± 25.92
1989 11 10
+80.49 ± 27.32 1.30 3.396 ± 0.316
0.5059 ± 0.1493


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

1989q1amsz.png
Past, gravitational, synchronous.
1989q1amz.png
Past, gravitational, asynchronous.


1989q1nmz.png
Past, nongravitational, asynchronous.
1989q1nmsz.png
Past, nongravitational, synchronous.


Future orbits, at next perihelion for the returning VCs

1989q1apsz.png
Future, gravitational, synchronous.
1989q1apz.png
Future, gravitational, asynchronous.


1989q1npz.png
Future, nongravitational, asynchronous.
1989q1npsz.png
Future, gravitational, synchronous.