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JPL Small-Body Database Browser
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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1044922275111351 4.4276e-08  
a 2.746574002565778 1.3909e-08 au
q 2.459578367013506 1.2309e-07 au
i 4.104897904995696 4.1717e-06 deg
node 117.5698461535696 6.245e-05 deg
peri 232.3188651648721 6.5296e-05 deg
M 43.62024483441591 1.8745e-05 deg
tp 2458399.048278756359
(2018-Oct-07.54827876)
8.6652e-05 TDB
period 1662.59084338039
4.55
1.263e-05
3.458e-08
d
yr
n .2165295216398798 1.6448e-09 deg/d
Q 3.03356963811805 1.5363e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1378  
   data-arc span      17425 days (47.71 yr)  
   first obs. used      1971-03-26  
   last obs. used      2018-12-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53111  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:27:58  

Additional Information
 Earth MOID = 1.4548 au 
 Jupiter MOID = 2.35244 au 
 T_jup = 3.336 
[ 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 14.4   n/a MPO332986  

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

[ show close-approach data ]
Alternate Designations
 1999 JH127 = 1998 FH128 = 4197 T-1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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