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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1594717794408449 7.875e-08  
a 2.759608379195846 3.1425e-08 AU
q 2.319528720405619 2.2697e-07 AU
i 9.351997063850767 8.6075e-06 deg
node 8.06274182495336 3.9984e-05 deg
peri 324.3298145373378 4.6486e-05 deg
M 39.60524423045429 2.6063e-05 deg
tp 2456816.287199787890
(2014-Jun-07.78719979)
0.00012056 JED
period 1674.440073907327
4.58
2.8602e-05
7.831e-08
d
yr
n .2149972433232176 3.6725e-09 deg/d
Q 3.199688037986074 3.6437e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      787  
   data-arc span      8364 days (22.90 yr)  
   first obs. used      1991-09-11  
   last obs. used      2014-08-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51307  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:35:30  

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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