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20355 Saraclark (1998 HD146)
Classification: Main-belt Asteroid          SPK-ID: 2020355
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1468826057497502 2.5458e-08  
a 2.296408876305323 6.0339e-09 au
q 1.959106356686742 5.7498e-08 au
i 4.595569302170706 2.6744e-06 deg
node 139.2241335764075 3.9344e-05 deg
peri 53.47464568433588 4.0736e-05 deg
M 200.5203683460334 1.0726e-05 deg
tp 2459763.586318580086
(2022-Jul-03.08631858)
3.8651e-05 TDB
period 1271.078147011692
3.48
5.0097e-06
1.372e-08
d
yr
n .283224128151649 1.1163e-09 deg/d
Q 2.633711395923905 6.9202e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1958  
   data-arc span      9860 days (27.00 yr)  
   first obs. used      1994-01-14  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51509  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:17:41  

Additional Information
 Earth MOID = .962547 au 
 Jupiter MOID = 2.32473 au 
 T_jup = 3.576 
[ 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 14.99   n/a E2021B10  

20355 Saraclark           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Sara Catherine Clark (b. 1990) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her physical science project. She attends the Keystone Junior High School, San Antonio, Texas.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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