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20491 Ericstrege (1999 OA5)
Classification: Main-belt Asteroid          SPK-ID: 2020491
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07320487065485523 3.2717e-08  
a 2.318622231478236 8.2157e-09 au
q 2.1488877909254 7.7364e-08 au
i 6.323074457857696 3.5635e-06 deg
node 295.7633939717471 3.1219e-05 deg
peri 264.26470170 3.9675e-05 deg
M 68.6556162117263 2.4054e-05 deg
tp 2458754.566897203594
(2019-Sep-28.06689720)
8.6144e-05 TDB
period 1289.565543096592
3.53
6.8541e-06
1.877e-08
d
yr
n .2791637865381728 1.4838e-09 deg/d
Q 2.488356672031072 8.8172e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1431  
   data-arc span      10174 days (27.85 yr)  
   first obs. used      1992-07-26  
   last obs. used      2020-06-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49056  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:42:26  

Additional Information
 Earth MOID = 1.15729 au 
 Jupiter MOID = 2.50975 au 
 T_jup = 3.568 
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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 15.0   n/a MPO435889  
rotation period rot_per 5.156 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

20491 Ericstrege           Discovered 1999 July 16 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Eric William Strege (b. 1990) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his earth and space science project. He attends the John Glenn Middle School of International Studies, Indio, California.
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

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Alternate Designations
 1999 OA5 = 1992 OK4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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