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15687 (1981 ES38)
Classification: Main-belt Asteroid          SPK-ID: 2015687
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 .1315170219826238 3.6121e-08  
a 2.382487832088439 7.5814e-09 au
q 2.06915012750233 8.518e-08 au
i 6.572442196515208 3.7413e-06 deg
node 197.7848130209927 2.7732e-05 deg
peri 146.2073038751132 3.0352e-05 deg
M 134.9001852011594 1.1432e-05 deg
tp 2458697.168038482295
(2019-Aug-01.66803848)
4.255e-05 TDB
period 1343.211692972653
3.68
6.4115e-06
1.755e-08
d
yr
n .2680143434452141 1.2793e-09 deg/d
Q 2.695825536674548 8.5785e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1442  
   data-arc span      14641 days (40.08 yr)  
   first obs. used      1981-02-12  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51238  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:05:48  

Additional Information
 Earth MOID = 1.06405 au 
 Jupiter MOID = 2.71598 au 
 T_jup = 3.517 
[ 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 14.9   n/a MPO347648  

15687 (1981 ES38)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 ES38 = 1996 GS17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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