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18613 (1998 DR)
Classification: Main-belt Asteroid          SPK-ID: 2018613
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1674227014216127 3.8461e-08  
a 2.750364215445023 1.4088e-08 au
q 2.289890808601883 1.0579e-07 au
i 6.277081387473008 3.7532e-06 deg
node 101.2345437773267 3.9897e-05 deg
peri 219.7931031136357 4.1736e-05 deg
M 154.0420549990172 1.2368e-05 deg
tp 2458287.613249592323
(2018-Jun-18.11324959)
5.76e-05 TDB
period 1666.033539661629
4.56
1.2801e-05
3.505e-08
d
yr
n .2160820844417789 1.6603e-09 deg/d
Q 3.210837622288164 1.6447e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1648  
   data-arc span      9959 days (27.27 yr)  
   first obs. used      1993-01-25  
   last obs. used      2020-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4824  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:13:54  

Additional Information
 Earth MOID = 1.28108 au 
 Jupiter MOID = 2.10125 au 
 T_jup = 3.317 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7   n/a MPO452434  

18613 (1998 DR)          Discovered 1998-Feb-19 by Klet at Klet
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 DR = 1999 JF50 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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