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118357 (1999 EM11)
Classification: Main-belt Asteroid          SPK-ID: 2118357
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1552501883420445 3.8445e-08  
a 2.409764430539024 9.1678e-09 au
q 2.035648048837881 9.3938e-08 au
i 5.577848606923636 6.0384e-06 deg
node 346.8512503292595 4.2184e-05 deg
peri 112.2444344306301 4.7405e-05 deg
M 284.3898386154549 1.9886e-05 deg
tp 2459287.470976561737
(2021-Mar-13.97097656)
7.579e-05 TDB
period 1366.344809618963
3.74
7.7972e-06
2.135e-08
d
yr
n .263476684264197 1.5036e-09 deg/d
Q 2.783880812240167 1.0591e-08 au
  Orbit Determination Parameters
   # obs. used (total)      559  
   data-arc span      7930 days (21.71 yr)  
   first obs. used      1999-02-12  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54595  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:12:07  

Additional Information
 Earth MOID = 1.06015 au 
 Jupiter MOID = 2.37172 au 
 T_jup = 3.497 
[ 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 16.2   n/a MPO436568  
diameter diameter 1.651 km 0.354 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.196   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118357 (1999 EM11)          Discovered 1999-Mar-15 by Spacewatch at Kitt Peak
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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