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C/1999 S4 (LINEAR)
Classification: Hyperbolic Comet          SPK-ID: 1000273
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2451588.5 (2000-Feb-14.0) TDB
Reference: JPL 99 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000105851065039 1.4918e-06  
a -7227.979658692035 101.86 AU
q .7650893449521207 1.2423e-06 AU
i 149.385076962833 2.4024e-05 deg
node 83.18078498265361 3.1066e-05 deg
peri 151.0502638191078 9.0776e-05 deg
M -.0002616983380269682 5.5317e-06 deg
tp 2451751.663222151165
(2000-Jul-26.16322215)
0.00020568 JED
period n/a
n/a
n/a
n/a
d
yr
n 1.603905185106689E-6 3.3905e-08 deg/d
Q n/a n/a AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 8.98363570060199E-8 1.911E-9
A2 [EST] -1.546503977200124E-8 8.916E-10
  Orbit Determination Parameters
   # obs. used (total)      1246  
   data-arc span      301 days  
   first obs. used      1999-09-27  
   last obs. used      2000-07-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   fit RMS      .79148  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-13 19:42:48  

Additional Information
 Earth MOID = .173378 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 9.4 mag 0.8 99 2 parameter fit from 429 observations, autocmod 2.5c
comet total magnitude slope K1 7.   n/a 99 autocmod 2.5c

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