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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1594717655932627 7.7e-08  
a 2.759608392003231 2.6108e-08 AU
q 2.319528769384491 2.1884e-07 AU
i 9.351996276941751 8.5791e-06 deg
node 8.062723839999004 3.6962e-05 deg
peri 324.3298358461017 4.3721e-05 deg
M 39.6052357373866 2.295e-05 deg
tp 2456816.287238008635
(2014-Jun-07.78723801)
0.00010692 JED
period 1674.44008556398
4.58
2.3762e-05
6.506e-08
d
yr
n .2149972418265093 3.051e-09 deg/d
Q 3.199688014621971 3.0271e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      803  
   data-arc span      8391 days (22.97 yr)  
   first obs. used      1991-09-11  
   last obs. used      2014-09-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51133  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 14:14:16  

Additional Information
 Earth MOID = 1.31786 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 13.2 mag n/a MPO263535  

21079 (1991 RR17)          Discovered 1991-Sep-11 by Holt, H. E. at Palomar (675)
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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