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21555 Levary (1998 QF70)
Classification: Outer Main-belt Asteroid          SPK-ID: 2021555
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08305525556119749 3.3145e-08  
a 3.200695575746928 2.1018e-08 au
q 2.934860986729673 1.0279e-07 au
i 15.67892475807024 4.5436e-06 deg
node 211.8785490646509 1.408e-05 deg
peri 246.8985241425162 3.2117e-05 deg
M 249.325398929337 3.035e-05 deg
tp 2460039.499219309354
(2023-Apr-04.99921931)
0.00017743 TDB
period 2091.53425187025
5.73
2.0602e-05
5.641e-08
d
yr
n .1721224501478223 1.6954e-09 deg/d
Q 3.466530164764183 2.2764e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1894  
   data-arc span      12374 days (33.88 yr)  
   first obs. used      1987-09-23  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45737  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:43:36  

Additional Information
 Earth MOID = 1.99205 au 
 Jupiter MOID = 1.84556 au 
 T_jup = 3.131 
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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 12.68   n/a MPCxxxxx  
diameter diameter 18.887 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.042   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21555 Levary           Discovered 1998 Aug. 24 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
David Andrew Levary (b. 1990) was awarded second place in the 2006 Intel International Science and Engineering Fair for his botany project. He attends the Parkway Central High School, Chesterfield, Missouri, 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: 20060711/MPCPages.arcLast Updated: 2006-07-17

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Alternate Designations
 1998 QF70 = 1987 SK24 = 1996 FJ16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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