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19656 Simpkins (1999 RA122)
Classification: Main-belt Asteroid          SPK-ID: 2019656
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 .08946802025771076 4.6544e-08  
a 2.374258738824218 9.1373e-09 au
q 2.161838509882047 1.1409e-07 au
i 5.98860852496839 4.6448e-06 deg
node 318.3903939026923 3.4897e-05 deg
peri 272.8740167155852 4.5212e-05 deg
M 21.91832674472913 3.0871e-05 deg
tp 2459119.142912914090
(2020-Sep-26.64291291)
0.00011449 TDB
period 1336.258542544573
3.66
7.7138e-06
2.112e-08
d
yr
n .2694089418612579 1.5552e-09 deg/d
Q 2.58667896776639 9.9548e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1343  
   data-arc span      9639 days (26.39 yr)  
   first obs. used      1994-01-21  
   last obs. used      2020-06-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51964  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:00:45  

Additional Information
 Earth MOID = 1.1599 au 
 Jupiter MOID = 2.43228 au 
 T_jup = 3.530 
[ 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 15.01   n/a E2021B10  

19656 Simpkins           Discovered 1999 Sept. 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Taylor Simpkins (b. 1990) is a finalist in the 2003 Discovery Channel Young Scientist Challenge, a middle school science competition, for her environmental sciences project. She attends the Pegasus School, Huntington Beach, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20031010/MPCPages.arcLast Updated: 2003-10-10

[ show close-approach data ]
Alternate Designations
 1999 RA122 = 1998 FW18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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