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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1980969514251949 3.2424e-08  
a 2.416205079291771 6.9004e-09 au
q 1.937562219066 7.9102e-08 au
i .222689633021941 2.8614e-06 deg
node 54.43301683357515 0.0011514 deg
peri 321.6617333600417 0.0011515 deg
M 202.5275830992879 1.0553e-05 deg
tp 2459800.568885716948
(2022-Aug-09.06888572)
4.1453e-05 TDB
period 1371.82627351371
3.76
5.8766e-06
1.609e-08
d
yr
n .2624238994037624 1.1242e-09 deg/d
Q 2.894847939517542 8.2673e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1196  
   data-arc span      15506 days (42.45 yr)  
   first obs. used      1977-12-07  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52896  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:55:51  

Additional Information
 Earth MOID = .937495 au 
 Jupiter MOID = 2.56978 au 
 T_jup = 3.489 
[ 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 15.61   n/a E2021B10  

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

[ show close-approach data ]
Alternate Designations
 1999 ND4 = 1977 XO3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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