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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1596110173684182 8.1235e-08  
a 2.760117961062161 3.9781e-08 AU
q 2.319572725240186 2.3922e-07 AU
i 9.351372924689576 8.6803e-06 deg
node 8.06372242040792 4.1723e-05 deg
peri 324.3553012467931 4.8623e-05 deg
M 356.5868582767342 3.143e-05 deg
tp 2456816.379678764722
(2014-Jun-07.87967876)
0.00014639 JED
period 1674.903891723011
4.59
3.621e-05
9.914e-08
d
yr
n .2149377058463097 4.6467e-09 deg/d
Q 3.200663196884137 4.613e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      776  
   data-arc span      7933 days (21.72 yr)  
   first obs. used      1991-09-11  
   last obs. used      2013-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51489  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:53:59  

Additional Information
 Earth MOID = 1.31615 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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