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12924 (1999 RK21)
Classification: Main-belt Asteroid          SPK-ID: 2012924
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1699377399649921 4.2486e-08  
a 2.155759085686657 5.3236e-09 au
q 1.789414258756068 9.0848e-08 au
i 2.751943222722856 4.3563e-06 deg
node 24.0180234031348 6.7017e-05 deg
peri 299.5352554684502 6.7968e-05 deg
M 217.2013785948604 1.2837e-05 deg
tp 2459459.085457660297
(2021-Sep-01.58545766)
4.179e-05 TDB
period 1156.10895352639
3.17
4.2825e-06
1.172e-08
d
yr
n .3113893365343465 1.1535e-09 deg/d
Q 2.522103912617245 6.2283e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1512  
   data-arc span      10272 days (28.12 yr)  
   first obs. used      1992-03-07  
   last obs. used      2020-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50121  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:48:22  

Additional Information
 Earth MOID = .779233 au 
 Jupiter MOID = 2.78686 au 
 T_jup = 3.681 
[ 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 15.5   n/a MPO350905  

12924 (1999 RK21)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 19991222/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RK21 = 1998 FD21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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