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204874 (2007 SR4)
Classification: Main-belt Asteroid          SPK-ID: 2204874
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04728304584124948 5.2432e-08  
a 2.727777923872685 2.3899e-08 au
q 2.598800275253465 1.5161e-07 au
i 4.807774614254024 5.0091e-06 deg
node 250.0411225217059 6.2739e-05 deg
peri 52.59091482675242 9.0113e-05 deg
M 28.41979185875499 6.1825e-05 deg
tp 2459070.593663779377
(2020-Aug-09.09366378)
0.00028298 TDB
period 1645.553256401399
4.51
2.1626e-05
5.921e-08
d
yr
n .2187714062729705 2.8751e-09 deg/d
Q 2.856755572491906 2.5029e-08 au
  Orbit Determination Parameters
   # obs. used (total)      279  
   data-arc span      8920 days (24.42 yr)  
   first obs. used      1996-02-17  
   last obs. used      2020-07-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55949  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:07:24  

Additional Information
 Earth MOID = 1.58466 au 
 Jupiter MOID = 2.24514 au 
 T_jup = 3.349 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.40   n/a E2021B55  

204874 (2007 SR4)          Discovered 2007-Sep-20 by Ries, W. at Altschwendt
Reference: 20090111/Numbers.arcLast Updated: 2009-02-03
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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