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21739 Annekeschwob (1999 RN157)
Classification: Main-belt Asteroid          SPK-ID: 2021739
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07901880095499231 3.6188e-08  
a 2.280168585192641 9.0931e-09 au
q 2.099992397615477 8.4051e-08 au
i 3.269992957101647 4.1249e-06 deg
node 36.20385201794485 6.7647e-05 deg
peri 340.4305792839493 7.3099e-05 deg
M 337.0246965630004 2.9598e-05 deg
tp 2459080.761564108896
(2020-Aug-19.26156411)
0.00010365 TDB
period 1257.618344777594
3.44
7.5229e-06
2.06e-08
d
yr
n .2862553663398294 1.7123e-09 deg/d
Q 2.460344772769805 9.8116e-09 au
  Orbit Determination Parameters
   # obs. used (total)      977  
   data-arc span      9296 days (25.45 yr)  
   first obs. used      1994-01-17  
   last obs. used      2019-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52601  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:30:21  

Additional Information
 Earth MOID = 1.10159 au 
 Jupiter MOID = 2.85363 au 
 T_jup = 3.600 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO337442  

21739 Annekeschwob           Discovered 1999 Sept. 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Anneke Ellen Schwob (b. 1988) was awarded second place in the 2005 Intel International Science and Engineering Fair for her biochemistry project. She attends the Boston Latin School, Boston, Massachusetts, 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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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