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43740 (1981 EM9)
Classification: Main-belt Asteroid          SPK-ID: 2043740
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1684350013502096 3.5815e-08  
a 2.267585268302699 8.724e-09 au
q 1.885644540574418 8.1419e-08 au
i 4.720995440303521 4.0085e-06 deg
node 272.5247327281576 4.9389e-05 deg
peri 11.66626422590899 5.1218e-05 deg
M 144.3822054753818 1.5538e-05 deg
tp 2458700.286926853126
(2019-Aug-04.78692685)
5.2965e-05 TDB
period 1247.222299589951
3.41
7.1976e-06
1.971e-08
d
yr
n .288641407484742 1.6657e-09 deg/d
Q 2.649525996030979 1.0193e-08 au
  Orbit Determination Parameters
   # obs. used (total)      893  
   data-arc span      14609 days (40.00 yr)  
   first obs. used      1981-02-02  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52767  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:22:03  

Additional Information
 Earth MOID = .867562 au 
 Jupiter MOID = 2.49332 au 
 T_jup = 3.592 
[ 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 15.63   n/a MPCxxxxx  

43740 (1981 EM9)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1981 EM9 = 1999 TE125 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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