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18087 Yamanaka (2000 JA22)
Classification: Main-belt Asteroid          SPK-ID: 2018087
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1511955170456241 4.4684e-08  
a 2.44102890915648 1.0092e-08 au
q 2.07195628111325 1.0614e-07 au
i 2.272986179937164 4.4491e-06 deg
node 350.8042247363722 7.1859e-05 deg
peri 182.6879767198335 7.2457e-05 deg
M 183.0005174145451 9.7051e-06 deg
tp 2459885.400222224734
(2022-Nov-01.90022222)
3.9166e-05 TDB
period 1393.021473279527
3.81
8.639e-06
2.365e-08
d
yr
n .258431048555532 1.6027e-09 deg/d
Q 2.810101537199709 1.1618e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1079  
   data-arc span      15921 days (43.59 yr)  
   first obs. used      1977-04-25  
   last obs. used      2020-11-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48809  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:22:34  

Additional Information
 Earth MOID = 1.07665 au 
 Jupiter MOID = 2.15491 au 
 T_jup = 3.485 
[ 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 15.69   n/a MPCxxxxx  

18087 Yamanaka           Discovered 2000 May 6 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Yvonne Joy Yamanaka (b. 1986) was awarded second place in the 2003 Intel International Science and Engineering Fair for her chemistry project. She attends the Oregon Episcopal School, Portland, Oregon, 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: 20040614/MPCPages.arcLast Updated: 2009-12-11

Alternate Designations
 2000 JA22 = 1977 HL1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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