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C/1898 R1 (Perrine-Chofardet)
Classification: Hyperbolic Comet          SPK-ID: 1000940
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2414553.5 (1898-Sep-21.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000034068376416 0.0015046  
a -12342.27305370854 5.4506e+05 au
q .4204812042222061 0.0004771 au
i 28.85833308632357 0.0049528 deg
node 36.29147474380338 0.013281 deg
peri 162.3636923834316 0.073708 deg
M -2.15922167233754E-5 0.0014303 deg
tp 2414583.539028446173
(1898-Oct-21.03902845)
0.0078164 TDB
period n/a
n/a
n/a
n/a
d
yr
n 7.188054288129372E-7 4.7616e-05 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      71  
   data-arc span      18 days  
   first obs. used      1898-09-15  
   last obs. used      1898-10-03  
   two-body model      T  
   norm. resid. RMS      .97685  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:28:56  

Additional Information
 Earth MOID = .437379 au 
 Jupiter MOID = .755383 au 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 7.5   0.6 2 2 parameter fit from 9 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a 2 autocmod 2.9c

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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