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18784 (1999 JS47)
Classification: Main-belt Asteroid          SPK-ID: 2018784
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2155116250885609 3.604e-08  
a 2.365343550824648 8.9146e-09 au
q 1.855584518293681 8.4197e-08 au
i 1.33741100880707 3.7945e-06 deg
node 299.0782004735085 0.00013572 deg
peri 34.54194745252011 0.0001359 deg
M 261.1359149311325 7.7529e-06 deg
tp 2459565.401643859898
(2021-Dec-16.90164386)
2.9787e-05 TDB
period 1328.739265609511
3.64
7.5117e-06
2.057e-08
d
yr
n .2709335151880705 1.5317e-09 deg/d
Q 2.875102583355615 1.0836e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1388  
   data-arc span      15148 days (41.47 yr)  
   first obs. used      1978-11-30  
   last obs. used      2020-05-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55028  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:37:52  

Additional Information
 Earth MOID = .8437 au 
 Jupiter MOID = 2.4977 au 
 T_jup = 3.516 
[ 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 15.33   n/a E2021B10  

18784 (1999 JS47)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JS47 = 1978 WH17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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