Comet C/1993 A1

Nongravitational nominal solution


   Observational arc:        1992 11 26 - 1994 08 17  
   Number of observations:   746  
   RMS:                      0.98 arcsec (1489 residuals used, 0.2% 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      
  1994 01 08   19940112.883853   1.93752930    1.00178211   130.657139     144.722421     124.877854  
                    ± 0.000112   0.00000129    0.00000327     0.000047       0.000021       0.000018        

  NG parameters:   
   A1 = (16.197  ± 0.164 )×10-8 AU/day2  
   A2 = (-2.0631 ± 0.1633)×10-8 AU/day2  
   A3 = 0 (assumed)  

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      
  1992 10 25   19940112.948975   1.93770644    1.00162206   130.665894     144.719773     124.878580  
                    ± 0.000216   0.00000215    0.00000436     0.000111       0.000021       0.000018        

  NG parameters:   
   A1 = (16.197  ± 0.164 )×10-8 AU/day2  
   A2 = (-2.0631 ± 0.1633)×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      
  1693 07 04   19940113.881309   1.94262382    0.99987828    130.675702   145.424546   124.964776    
                    ± 0.000219   0.00000212    0.00000437      0.000109     0.000020     0.000014        
   1/aori =  (62.66 ± 2.25)×10-6 AU-1  

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

  Epoch        Perihelion time   q             e             ω             Ω            i      
  2289 05 21   19940113.938832   1.93440315    1.00078924    130.707526   145.576569   124.885135       
                    ± 0.000229   0.00000203    0.00000510      0.000116     0.000023     0.000020       
  1/afut = (-408.00 ± 2.42)×10-6 AU-1  

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

Nongravitational orbit (539 obs.) with A1= 16.6 10-8 AU/day2, A2= -2.2 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 15 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]
15 C/1993 A1 Mueller
weighting
+11.26 ± 3.99 -888.56 ± 4.04
1992 10 25
-508.85 ± 3.99 2.42 +62.66 ± 2.25 -837.10 ± 2.25
1992 10 25
-408.00 ± 2.42 0.98 16.197 ± 0.164
-2.063 ± 0.163


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

1993a1amz.png
Past, gravitational, asynchronous.
1993a1amsz.png
Past, gravitational, synchronous.


1993a1nmz.png
Past, nongravitational,asynchronous.
1993a1nmsz.png
Past, nongravitational, synchronous.


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

1993a1apz.png
Future, gravitational, asynchronous.
1993a1apsz.png
Future, gravitational, synchronous.


1993a1npz.png
Future, nongravitational, asynchronous.
1993a1npsz.png
Future,nongravitational, synchronous.