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102181 (1999 RT240)
Classification: Main-belt Asteroid          SPK-ID: 2102181
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .209001629180614 5.3447e-08  
a 2.58416859879517 1.2859e-08 au
q 2.044073151569595 1.3536e-07 au
i 14.61141296083701 6.1974e-06 deg
node 47.27374643565383 1.4107e-05 deg
peri 309.7602733708498 1.9906e-05 deg
M 44.6805734920906 1.3775e-05 deg
tp 2459012.180222547746
(2020-Jun-11.68022255)
5.7951e-05 TDB
period 1517.328775889874
4.15
1.1326e-05
3.101e-08
d
yr
n .2372590606072631 1.7709e-09 deg/d
Q 3.124264046020745 1.5547e-08 au
  Orbit Determination Parameters
   # obs. used (total)      656  
   data-arc span      7822 days (21.42 yr)  
   first obs. used      1999-09-11  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48479  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:40:45  

Additional Information
 Earth MOID = 1.07287 au 
 Jupiter MOID = 2.42104 au 
 T_jup = 3.347 
[ 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 15.34   n/a E2021B55  

102181 (1999 RT240)          Discovered 1999-Sep-11 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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