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18021 Waldman (1999 JH127)
Classification: Main-belt Asteroid          SPK-ID: 2018021
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1051124644289657 4.1797e-08  
a 2.745954899731398 1.2315e-08 au
q 2.457320813009837 1.162e-07 au
i 4.105263279672238 3.7899e-06 deg
node 117.5662986152336 5.8305e-05 deg
peri 232.4360471872442 6.0635e-05 deg
M 215.8157182468973 1.7665e-05 deg
tp 2460062.162274272261
(2023-Apr-27.66227427)
8.2565e-05 TDB
period 1662.028730346381
4.55
1.118e-05
3.061e-08
d
yr
n .2166027538675418 1.4571e-09 deg/d
Q 3.034588986452959 1.3609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1671  
   data-arc span      18336 days (50.20 yr)  
   first obs. used      1971-03-26  
   last obs. used      2021-06-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51802  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:57:07  

Additional Information
 Earth MOID = 1.45268 au 
 Jupiter MOID = 2.35461 au 
 T_jup = 3.336 
[ 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 14.46   n/a MPCxxxxx  

18021 Waldman           Discovered 1999 May 13 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Sarah Elyse Waldman (b. 1985) was awarded second place in the 2003 Intel International Science and Engineering Fair for her behavioral and social sciences project. She attends the Roslyn High School, Roslyn Heights, New York, 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: 20040614/MPCPages.arcLast Updated: 2009-12-11

Alternate Designations
 1999 JH127 = 1998 FH128 = 4197 T-1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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