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21079 (1991 RR17)
Classification: Main-belt Asteroid          SPK-ID: 2021079
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1592038663086723 6.9549e-08  
a 2.759519552151002 2.024e-08 au
q 2.320193370294187 1.9286e-07 au
i 9.35218068912573 7.3436e-06 deg
node 8.061451663092857 2.9661e-05 deg
peri 324.3219634161431 3.5453e-05 deg
M 125.6457785060824 1.8244e-05 deg
tp 2456816.121753419737
(2014-Jun-07.62175342)
8.5701e-05 JED
period 1674.359228541136
4.58
1.8421e-05
5.043e-08
d
yr
n .2150076243278254 2.3655e-09 deg/d
Q 3.198845734007818 2.3462e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1066  
   data-arc span      8864 days (24.27 yr)  
   first obs. used      1991-09-11  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48537  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:47:01  

Additional Information
 Earth MOID = 1.31601 au 
 Jupiter MOID = 2.2008 au 
 T_jup = 3.304 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4 mag n/a MPO358831  

21079 (1991 RR17)          Discovered 1991-Sep-11 by Holt, H. E. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RR17 = 1999 GZ52 = 2000 PU19 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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