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

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1569446312812975 2.8448e-08  
a 2.761966314406788 1.2635e-08 au
q 2.32849052958085 7.6991e-08 au
i 9.338591025063549 7.2923e-07 deg
node 7.999699783797267 1.9214e-06 deg
peri 324.9862170518563 5.4411e-06 deg
M 151.4727068209306 6.2311e-06 deg
tp 2458495.063578023732
(2019-Jan-11.56357802)		 2.5528e-05 TDB
period 1676.586609174958
4.59		 1.1505e-05
3.15e-08		 d
yr
n .2147219821689705 1.4734e-09 deg/d
Q 3.195442099232726 1.4618e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2044  
   data-arc span      10774 days (29.50 yr)  
   first obs. used      1991-09-11  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4567  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:38:34  

Additional Information
 Earth MOID = 1.32428 au 
 Jupiter MOID = 2.21674 au 
 T_jup = 3.304 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.44   n/a E2021B10  

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

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