Nongravitational nominal solution


   Observational arc:        2001 08 24 - 2006 08 18  
   Number of observations:   2661  
   RMS:                      0.63 arcsec (5263 residuals used, 1.9% rejected residuals ) 

Heliocentric osculating orbit at the standard epoch close to perihelion time (the same as in MWC08)

  Epoch        Perihelion time   q             e            ω              Ω            i      
  2004 06 04   20040516.964929   0.96195750    1.00069251     1.203247    210.278476    99.642698        
                    ± 0.000005   0.00000006    0.00000069     0.000007      0.000008     0.000006         

  NG parameters:   
   A1 = ( 1.6229  ± 0.0143 )×10-8 AU/day2  
   A2 = ( 0.07695 ± 0.00637)×10-8 AU/day2  
   A3 = (-0.00909 ± 0.00533)×10-8 AU/day2  

Heliocentric osculating orbit at the epoch close to the discovery date (used as starting orbit in this investigation)

  Epoch        Perihelion time   q             e            ω              Ω            i      
  2001 07 30   20040516.066611   0.96136132    1.00056045     1.213390    210.200163    99.564097        
                    ± 0.000024   0.00000035    0.00000084     0.000051      0.000008     0.000011         

  NG parameters:   
   A1 = ( 1.6229  ± 0.0143 )×10-8 AU/day2  
   A2 = ( 0.07695 ± 0.00637)×10-8 AU/day2  
   A3 = (-0.00909 ± 0.00533)×10-8 AU/day2  

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

  Epoch        Perihelion time   q             e             ω             Ω            i      
  1705 08 31   20040516.039344   0.96047302    0.99994154      1.319083   211.013404    99.743934              
                    ± 0.000029   0.00000035    0.00000084      0.000051     0.000015     0.000004         
   1/aori =  (+60.87 ± 0.48)×10-6 AU-1  

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

  Epoch        Perihelion time   q             e             ω             Ω            i      
  2294 12 21   20040515.816512   0.96128400    1.00066965      1.201146   211.053754    99.551509              
                    ± 0.000021   0.00000018    0.00000046      0.000017     0.000015     0.000004         
   1/afut = (-696.62 ± 0.48)×10-6 AU-1  

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

Nongravitational orbit (1106 obs.) with A1 = 1.49×10-8 AU/day2 and A2 = -0.2965×10-8 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 22 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]
22 C/2001 Q4 NEAT
weighting
+12.51 ± 0.43 -631.42 ± 0.42
2001 07 30
-731.74 ± 0.43 1.29 +60.87 ± 0.48 -582.97 ± 0.48
2001 07 30
-696.62 ± 0.48 0.63 1.6229 ± 0.0143
0.07695 ± 0.00637
-0.00909 ± 0.00533


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 orbit, at previous perihelion for the returning VCs :

2001q4amz.png
Past, gravitational.


2001q4amgz.png
Past, gravitational, asynchronous,
escape border extended up to 170 000 AU.
2001q4amsgz.png
Past, gravitational, synchronous,
escape border extended up to 170 000 AU.


2001q4nmz.png
Past, nongravitational, asynchronous.
2001q4nmsz.png
Past, nongravitational, synchronous.


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

2001q4apz.png
Future, gravitational.
2001q4npsz.png
Future, nongravitational.