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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 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1596110466877365 8.2154e-08  
a 2.760117946888396 3.8554e-08 AU
q 2.319572632403933 2.378e-07 AU
i 9.351382242311843 9.0193e-06 deg
node 8.063747014821814 4.2376e-05 deg
peri 324.3552871185453 4.9502e-05 deg
M 356.586855948971 3.2819e-05 deg
tp 2456816.379689472348
(2014-Jun-07.87968947)
0.00015287 JED
period 1674.903878821555
4.59
3.5093e-05
9.608e-08
d
yr
n .2149377075019328 4.5034e-09 deg/d
Q 3.200663261372859 4.4707e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      775  
   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      .53847  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 19:40:38  

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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