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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2686523880916127 5.7089e-08  
a 2.655457767046501 6.3599e-08 au
q 1.942062696453037 1.3469e-07 au
i 6.229266497610134 1.1703e-05 deg
node 194.1229273091085 6.5269e-05 deg
peri 256.0252921430247 7.1167e-05 deg
M 226.6034948978747 3.0857e-05 deg
tp 2459186.165276162577
(2020-Dec-02.66527616)
0.00014895 TDB
period 1580.547400826684
4.33
5.6782e-05
1.555e-07
d
yr
n .2277691892136273 8.1827e-09 deg/d
Q 3.368852837639965 8.0685e-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 = .969536 au 
 Jupiter MOID = 1.90984 au 
 T_jup = 3.328 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457583.5 (2016-Jul-14.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2658889508641756 5.6984e-08  
q 1.950818809054489 1.3419e-07 au
tp 2457602.947525661660
(2016-Aug-02.44752566)
0.00012067 TDB
node 194.2071349916053 6.5046e-05 deg
peri 255.7816106781455 7.1196e-05 deg
i 6.233053828083793 1.1724e-05 deg
  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
 Jupiter MOID = 1.90984 au 
 T_jup = 3.328 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.247138260424832E-15 -7.286634712015727E-15 4.091239672676578E-12 -4.979356249726698E-14 9.511037779755866E-13 2.927862557081464E-15
q -7.286634712015727E-15 1.800723810326268E-14 -8.702436581718261E-12 1.05167869964266E-13 -2.024446320015838E-12 -3.984538092902195E-15
tp 4.091239672676578E-12 -8.702436581718261E-12 1.456012839999833E-8 -1.214792871771192E-10 3.553316214161987E-9 -4.010037425470148E-12
node -4.979356249726698E-14 1.05167869964266E-13 -1.214792871771192E-10 4.230918054766112E-9 -4.233256480748723E-9 -4.88079038220517E-10
peri 9.511037779755866E-13 -2.024446320015838E-12 3.553316214161987E-9 -4.233256480748723E-9 5.068858341432082E-9 4.841396996912512E-10
i 2.927862557081464E-15 -3.984538092902195E-15 -4.010037425470148E-12 -4.88079038220517E-10 4.841396996912512E-10 1.374571576825208E-10

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 16.9   n/a MPO456351  

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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