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118170 (1981 EV40)
Classification: Main-belt Asteroid          SPK-ID: 2118170
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1304377587004832 4.9289e-08  
a 2.659256469147953 1.8023e-08 au
q 2.312389015502534 1.2954e-07 au
i 14.50912221336622 6.2076e-06 deg
node 357.1034807377657 1.6539e-05 deg
peri 39.6360241149489 2.6214e-05 deg
M 144.0417668378094 2.2e-05 deg
tp 2458366.740178728749
(2018-Sep-05.24017873)
9.4222e-05 TDB
period 1583.940135325821
4.34
1.6103e-05
4.409e-08
d
yr
n .2272813169962052 2.3106e-09 deg/d
Q 3.006123922793373 2.0374e-08 au
  Orbit Determination Parameters
   # obs. used (total)      781  
   data-arc span      14323 days (39.21 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53118  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:17:54  

Additional Information
 Earth MOID = 1.334 au 
 Jupiter MOID = 2.52051 au 
 T_jup = 3.329 
[ 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 MPO469222  

118170 (1981 EV40)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

Alternate Designations
 1981 EV40 = 2000 SM12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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