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85141 (1981 EM28)
Classification: Main-belt Asteroid          SPK-ID: 2085141
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2503250490338078 6.2983e-08  
a 3.108313526091182 4.2296e-08 au
q 2.330224790259959 2.0444e-07 au
i 24.94436302730808 1.1934e-05 deg
node 357.062160904544 1.4802e-05 deg
peri 271.5950612048306 3.182e-05 deg
M 344.523570014297 3.247e-05 deg
tp 2459086.550607534618
(2020-Aug-25.05060753)
0.00018158 TDB
period 2001.638539448682
5.48
4.0856e-05
1.119e-07
d
yr
n .179852652167237 3.671e-09 deg/d
Q 3.886402261922405 5.2884e-08 au
  Orbit Determination Parameters
   # obs. used (total)      367  
   data-arc span      13927 days (38.13 yr)  
   first obs. used      1981-02-12  
   last obs. used      2019-04-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62172  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:51:07  

Additional Information
 Earth MOID = 1.4721 au 
 Jupiter MOID = 1.90042 au 
 T_jup = 3.031 
[ 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 14.7   n/a MPO395761  
diameter diameter 6.633 km 0.209 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85141 (1981 EM28)          Discovered 1981-Mar-06 by Bus, S. J. at Siding Spring
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1981 EM28 = 2003 FR13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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