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197871 (2004 RD8)
Classification: Main-belt Asteroid          SPK-ID: 2197871
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1074255504373308 1.1396e-07  
a 2.516297762886332 1.5524e-08 au
q 2.245983090644044 2.8647e-07 au
i 2.754375073652945 9.883e-06 deg
node 10.91597262569938 0.00012008 deg
peri 298.2806451527719 0.00013472 deg
M 48.56029277935823 5.477e-05 deg
tp 2459003.838082251305
(2020-Jun-03.33808225)
0.00022197 TDB
period 1457.946118883881
3.99
1.3492e-05
3.694e-08
d
yr
n .246922705398465 2.2851e-09 deg/d
Q 2.78661243512862 1.7192e-08 au
  Orbit Determination Parameters
   # obs. used (total)      235  
   data-arc span      9338 days (25.57 yr)  
   first obs. used      1995-03-28  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54972  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 05:45:11  

Additional Information
 Earth MOID = 1.23106 au 
 Jupiter MOID = 2.42747 au 
 T_jup = 3.449 
[ 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 17.11   n/a E2021B55  

197871 (2004 RD8)          Discovered 2004-Sep-06 by Tichy, M. at Klet
Reference: 20081113/Numbers.arcLast Updated: 2008-11-17

Alternate Designations
 2004 RD8 = 2000 QM235 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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