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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2690449734307146 5.2482e-08  
a 2.654790457808455 5.3412e-08 au
q 1.940532429623265 1.3014e-07 au
i 6.230121884689476 1.0985e-05 deg
node 194.1094933786574 6.3878e-05 deg
peri 256.0852629752336 6.8526e-05 deg
M 317.7182256666976 2.7636e-05 deg
tp 2459186.064331769570
(2020-Dec-02.56433177)
0.00012457 TDB
period 1579.95165743149
4.33
4.7681e-05
1.305e-07
d
yr
n .2278550728477655 6.8764e-09 deg/d
Q 3.369048485993645 6.7782e-08 au
  Orbit Determination Parameters
   # obs. used (total)      106  
   data-arc span      3327 days (9.11 yr)  
   first obs. used      2011-09-21  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57629  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 02:25:18  

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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