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C/2021 O1 (Nishimura)
Classification: Hyperbolic Comet          SPK-ID: 1003795
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459422.5 (2021-Jul-27.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.003088700983971 0.0029555  
a -254.9349103814878 243.78 au
q .7874177085438783 0.00051189 au
i 27.56772659686253 0.0074691 deg
node 41.63147301222162 0.016701 deg
peri 74.43626730026932 0.038715 deg
M -.004340743188180425 0.0062225 deg
tp 2459440.426850024398
(2021-Aug-13.92685002)
0.01715 TDB
period n/a
n/a
n/a
n/a
d
yr
n .0002421364144996349 0.00034731 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      59  
   data-arc span      13 days  
   first obs. used      2021-07-23  
   last obs. used      2021-08-05  
   two-body model      T  
   norm. resid. RMS      .67718  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Sep-04 23:43:11  

Additional Information
 Earth MOID = .132247 au 
 Jupiter MOID = 1.2278 au 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 11.0   1. 4 from 36 observations, assumed slope, autocmod 2.9e
comet total magnitude slope K1 10.   n/a 4 autocmod 2.9e
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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