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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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2503250607922438 6.274e-08  
a 3.108313522241178 4.0353e-08 au
q 2.330224750824801 2.0271e-07 au
i 24.94436550591952 1.1786e-05 deg
node 357.0621747527479 1.4778e-05 deg
peri 271.59504932888 3.0646e-05 deg
M 344.5235737260718 3.025e-05 deg
tp 2459086.550586736877
(2020-Aug-25.05058674)
0.00016911 TDB
period 2001.638535729792
5.48
3.8979e-05
1.067e-07
d
yr
n .1798526525013893 3.5024e-09 deg/d
Q 3.886402293657554 5.0455e-08 au
  Orbit Determination Parameters
   # obs. used (total)      376  
   data-arc span      14404 days (39.44 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-07-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61944  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:01:57  

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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