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C/2013 A1 (Siding Spring)
Classification: Hyperbolic Comet          SPK-ID: 1003228
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456553.5 (2013-Sep-18.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000617980335404 2.8407e-06  
a -2263.629262385714 10.408 AU
q 1.398878370799559 5.0081e-06 AU
i 129.0273129343852 1.9334e-05 deg
node 300.9761475701361 5.3517e-05 deg
peri 2.439792393256829 0.00012468 deg
M -.003682333669040383 2.539e-05 deg
tp 2456955.871316758419
(2014-Oct-25.37131676)
0.00080717 JED
period n/a
n/a
n/a
n/a
d
yr
n 9.151580929540339E-6 6.3115e-08 deg/d
Q n/a n/a AU
  Orbit Determination Parameters
   # obs. used (total)      713  
   data-arc span      662 days (1.81 yr)  
   first obs. used      2012-10-04  
   last obs. used      2014-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   fit RMS      .40919  
   data source      ORB  
   producer      Davide Farnocchia  
   solution date      2014-Jul-29 01:26:50  

Additional Information
 Earth MOID = .383753 AU 
 T_jup = -0.919 
[ 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 8.6 mag 0.6 53 2 parameter fit from 183 observations, autocmod 2.5c
comet total magnitude slope K1 7.   n/a 53 autocmod 2.5c

[ 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
2014-Oct-19 18:33 < 00:01 Mars 0.000878182134364555 0.00085788462253926 0.000898592505433032 55.9637577958296 55.9579322405814 2456950.273121587 0.691041322518592 1130.97685763402 223.668115560892 -27.2110840502879 272.388867656161 T 53 CATAB v2.0c-linF95 2014-Jul-29 02:22:01 2014-Jul-29 02:22
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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