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118165 (1981 EH2)
Classification: Main-belt Asteroid          SPK-ID: 2118165
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .12679949407424 4.1567e-08  
a 3.041737945044147 2.3587e-08 au
q 2.656047112506131 1.266e-07 au
i 10.07365841566736 4.3023e-06 deg
node 221.1072638646937 2.6916e-05 deg
peri 268.3899925123836 3.3189e-05 deg
M 215.9096486190589 2.2909e-05 deg
tp 2459976.056638932128
(2023-Jan-31.55663893)
0.0001282 TDB
period 1937.675821730947
5.31
2.2538e-05
6.171e-08
d
yr
n .1857895918205802 2.161e-09 deg/d
Q 3.427428777582164 2.6578e-08 au
  Orbit Determination Parameters
   # obs. used (total)      514  
   data-arc span      14554 days (39.85 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-12-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5857  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:56:01  

Additional Information
 Earth MOID = 1.6948 au 
 Jupiter MOID = 1.77622 au 
 T_jup = 3.204 
[ 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 15.20   n/a E2021B55  
diameter diameter 5.516 km 0.368 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.058   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118165 (1981 EH2)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1981 EH2 = 2000 VU60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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