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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 2451590.5 (2000-Feb-16.0) TDB
Reference: JPL 98 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000105142607075 2.1289e-06  
a -7276.713447107039 147.33 AU
q .7650926227669765 1.7699e-06 AU
i 149.3853693009504 3.4529e-05 deg
node 83.18119985783667 4.4645e-05 deg
peri 151.0505203043675 0.00012986 deg
M -.0002558987205682198 7.7716e-06 deg
tp 2451751.663596365512
(2000-Jul-26.16359637)
0.00029111 JED
period n/a
n/a
n/a
n/a
d
yr
n 1.587819621422773E-6 4.8224e-08 deg/d
Q n/a n/a AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 8.949983410367247E-8 2.706E-9
A2 [EST] -1.567687761142191E-8 1.266E-9
  Orbit Determination Parameters
   # obs. used (total)      1268  
   data-arc span      301 days  
   first obs. used      1999-09-27  
   last obs. used      2000-07-24  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   fit RMS      .60944  
   data source      ORB  
   producer      Otto Matic  
   solution date      2011-Sep-14 21:15:43  

Additional Information
 Earth MOID = .17303 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 98 2 parameter fit from 429 observations, autocmod 2.5a
comet total magnitude slope K1 7.   n/a 98 autocmod 2.5a

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (AU) Minimum Distance (AU) Maximum Distance (AU) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2000-Jul-22 18:38 < 00:01 Earth 0.372441569507177 0.372439532032349 0.372443606983327 75.5793354685342 75.5792408118235 2451748.276729960 0.0135282823928542 106.851396270101 40.7911184213203 -17.2687972986674 635165.348054372 T 98 CATAB v2.0c-linF95 2011-Sep-15 11:38:18 2011-Sep-15 13:08
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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