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21628 Lucashof (1999 ND4)
Classification: Main-belt Asteroid          SPK-ID: 2021628
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1982117653867866 2.9469e-08  
a 2.416121175016081 6.752e-09 au
q 1.937217531527746 7.2519e-08 au
i .2226527426516392 2.8443e-06 deg
node 54.43578842691917 0.00095291 deg
peri 321.6454608137942 0.00095295 deg
M 253.9914730343417 1.0128e-05 deg
tp 2459800.438076650030
(2022-Aug-08.93807665)
3.9587e-05 TDB
period 1371.754817809318
3.76
5.7502e-06
1.574e-08
d
yr
n .2624375692552094 1.1001e-09 deg/d
Q 2.895024818504416 8.0904e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1274  
   data-arc span      15920 days (43.59 yr)  
   first obs. used      1977-12-07  
   last obs. used      2021-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52017  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:01:53  

Additional Information
 Earth MOID = .937773 au 
 Jupiter MOID = 2.5705 au 
 T_jup = 3.489 
[ 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 15.62   n/a MPO614063  

21628 Lucashof           Discovered 1999 July 13 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Lucas Hudson Hofmeister (b. 1988) was awarded second place in the 2005 Intel International Science and Engineering Fair for his engineering project. He attends the Martin Luther King, Jr. Magnet High School, Nashville, Tennessee, 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

Alternate Designations
 1999 ND4 = 1977 XO3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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