Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
C/2010 A4 (Siding Spring)
Classification: Comet          SPK-ID: 1003057
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2455320.5 (2010-May-04.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9906259743486699 7.6238e-06  
a 292.0832142436253 0.23775 au
q 2.737995542642675 2.5159e-06 au
i 96.73013689608537 4.9229e-05 deg
node 346.6855022422359 3.9873e-05 deg
peri 271.6852761384367 0.00010631 deg
M 359.9688550559462 3.8032e-05 deg
tp 2455478.240560602957
(2010-Oct-08.74056060)
0.00047524 TDB
period 1823300.813094585
4991.93
2226.2
6.095
d
yr
n .0001974441065426787 2.4107e-07 deg/d
Q 581.4284329446078 0.47327 au
  Orbit Determination Parameters
   # obs. used (total)      140  
   data-arc span      655 days (1.79 yr)  
   first obs. used      2010-01-12  
   last obs. used      2011-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .73362  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Mar-09 07:18:04  

Additional Information
 Earth MOID = 2.53071 au 
 Jupiter MOID = .156264 au 
 T_jup = -0.222 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 7.1   0.5 21 2 parameter fit from 37 observations, autocmod 2.8
comet total magnitude slope K1 15.5   n/a 21 autocmod 2.8
comet nuclear magnitude M2 13.5   0.7 21 from 72 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 21 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 21 autocmod 2.8

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2010.8   C/2010 A4       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-31 12:17 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin