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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 2451587.5 (2000-Feb-13.0) TDB
Reference: JPL 100 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000108293667131 1.5584e-06  
a -7064.946187139971 101.67 au
q .7650889306889462 1.2973e-06 au
i 149.3849284408427 2.4886e-05 deg
node 83.18058544347436 3.2132e-05 deg
peri 151.0499937079533 9.4443e-05 deg
M -.0002724680726568999 5.881e-06 deg
tp 2451751.662831081759
(2000-Jul-26.16283108)
0.00021979 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.659742774058282E-6 3.5826e-08 deg/d
Q n/a n/a au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 9.141289699030303E-8 2.049E-9
A2 [EST] -1.679661485752839E-8 9.527E-10
  Orbit Determination Parameters
   # obs. used (total)      1230  
   data-arc span      300 days  
   first obs. used      1999-09-27  
   last obs. used      2000-07-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .72106  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:30:02  

Additional Information
 Earth MOID = .173605 au 
 Jupiter MOID = .801981 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 9.6   0.8 100 2 parameter fit from 429 observations, autocmod 2.9c
comet total magnitude slope K1 6.5   n/a 100 autocmod 2.9c

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