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21704 Mikkilineni (1999 RD85)
Classification: Main-belt Asteroid          SPK-ID: 2021704
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03013734338721615 3.6457e-08  
a 2.980131428695348 1.5014e-08 au
q 2.890318184489721 1.163e-07 au
i .3218494870608475 3.3568e-06 deg
node 307.1403927900386 0.00070116 deg
peri 157.7656191789594 0.00070445 deg
M 338.4618632288237 6.7952e-05 deg
tp 2459508.923521030451
(2021-Oct-21.42352103)
0.00035477 TDB
period 1879.10718559114
5.14
1.4201e-05
3.888e-08
d
yr
n .1915803434527068 1.4478e-09 deg/d
Q 3.069944672900975 1.5467e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1362  
   data-arc span      10956 days (30.00 yr)  
   first obs. used      1991-01-12  
   last obs. used      2021-01-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52504  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:36:21  

Additional Information
 Earth MOID = 1.90744 au 
 Jupiter MOID = 1.95744 au 
 T_jup = 3.259 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457048.5 (2015-Jan-26.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02711602520303494 3.5981e-08  
q 2.900516462321669 1.1451e-07 au
tp 2457605.285264446676
(2016-Aug-04.78526445)
0.00039834 TDB
node 308.129511057043 0.00070264 deg
peri 152.2827881341801 0.0007068 deg
i .3210224765975956 3.36e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1362  
   data-arc span      10956 days (30.00 yr)  
   first obs. used      1991-01-12  
   last obs. used      2021-01-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52504  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:36:21  

Additional Information
 Jupiter MOID = 1.95744 au 
 T_jup = 3.259 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.294656285813252E-15 -4.093566565632414E-15 -4.492931071549989E-14 6.703602467620683E-16 5.475015449005123E-14 -3.638035541264746E-17
q -4.093566565632414E-15 1.311188383458771E-14 2.996934293136088E-13 -1.482787266038357E-14 -1.401991440687779E-13 1.893495745305793E-16
tp -4.492931071549989E-14 2.996934293136088E-13 1.586777635608945E-7 8.403032646960751E-11 3.051366914505629E-8 1.069641588307334E-12
node 6.703602467620683E-16 -1.482787266038357E-14 8.403032646960751E-11 4.937073229042849E-7 -4.936836123120208E-7 2.521011392610002E-10
peri 5.475015449005123E-14 -1.401991440687779E-13 3.051366914505629E-8 -4.936836123120208E-7 4.995704859553862E-7 -2.519005128456695E-10
i -3.638035541264746E-17 1.893495745305793E-16 1.069641588307334E-12 2.521011392610002E-10 -2.519005128456695E-10 1.128950582170185E-11

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 14.66   n/a E2021B10  

21704 Mikkilineni           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Sohan Venkat Mikkilineni (b. 1989) was awarded second place in the 2005 Intel International Science and Engineering Fair for his biochemistry team project. He attends the Detroit Country Day School, Beverly Hills, Michigan, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

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Alternate Designations
 1999 RD85 = 1992 JU = 1997 EX56 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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