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487700 (2015 RR21)
Classification: Main-belt Asteroid          SPK-ID: 2487700
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2690449600683544 5.7233e-08  
a 2.654790438230013 6.3028e-08 au
q 1.94053245078657 1.3509e-07 au
i 6.23012307477378 1.1706e-05 deg
node 194.1094983451168 6.5268e-05 deg
peri 256.0852541556549 7.114e-05 deg
M 317.7182277564685 3.2867e-05 deg
tp 2459186.064320545340
(2020-Dec-02.56432055)
0.0001487 TDB
period 1579.951639953844
4.33
5.6265e-05
1.54e-07
d
yr
n .2278550753683302 8.1144e-09 deg/d
Q 3.369048425673456 7.9985e-08 au
  Orbit Determination Parameters
   # obs. used (total)      99  
   data-arc span      2892 days (7.92 yr)  
   first obs. used      2011-09-21  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59432  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 08:19:37  

Additional Information
 Earth MOID = .968024 au 
 Jupiter MOID = 1.9091 au 
 T_jup = 3.328 
[ 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 17.0   n/a MPO495391  

487700 (2015 RR21)          Discovered 2011-Sep-21 by Spacewatch at Kitt Peak
Reference: Last Updated: 2017-03-14

[ show close-approach data ]
Alternate Designations
 2015 RR21 = 2011 UM220 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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