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JPL Small-Body Database Browser
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20321 Lightdonovan (1998 HJ19)
Classification: Main-belt Asteroid          SPK-ID: 2020321
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1177208655578158 3.8887e-08  
a 2.312383751904739 8.608e-09 au
q 2.040167935128684 9.0186e-08 au
i 4.846792960158901 4.2356e-06 deg
node 349.4573719847449 4.5091e-05 deg
peri 54.9451925137471 4.9275e-05 deg
M 142.9213786655069 1.8357e-05 deg
tp 2458090.602377865374
(2017-Dec-03.10237787)
6.5046e-05 TDB
period 1284.364492439416
3.52
7.1717e-06
1.964e-08
d
yr
n .2802942639096521 1.5651e-09 deg/d
Q 2.584599568680795 9.6213e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1100  
   data-arc span      9157 days (25.07 yr)  
   first obs. used      1994-04-08  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54006  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:51:44  

Additional Information
 Earth MOID = 1.0526 au 
 Jupiter MOID = 2.77176 au 
 T_jup = 3.569 
[ 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 15.5   n/a MPO337429  

20321 Lightdonovan           Discovered 1998 Apr. 18 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Donna Light-Donovan mentored a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. She teaches at the Croton-Harmon High School, Croton-on-Hudson, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040415/MPCPages.arcLast Updated: 2004-04-20

Alternate Designations
 1998 HJ19 = 1996 XN10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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