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117645 (2005 ER139)
Classification: Outer Main-belt Asteroid          SPK-ID: 2117645
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2372329029082407 4.402e-08  
a 3.277615267557345 2.6183e-08 au
q 2.500057083018346 1.4064e-07 au
i 2.610593271319333 4.7565e-06 deg
node 82.84365355265716 0.00012947 deg
peri 163.6112523341754 0.00012995 deg
M 174.2080196143794 1.2784e-05 deg
tp 2457951.679829904916
(2017-Jul-17.17982990)
7.1013e-05 TDB
period 2167.381628411924
5.93
2.5971e-05
7.11e-08
d
yr
n .1660990364044831 1.9903e-09 deg/d
Q 4.055173452096344 3.2395e-08 au
  Orbit Determination Parameters
   # obs. used (total)      490  
   data-arc span      9723 days (26.62 yr)  
   first obs. used      1993-03-18  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56629  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 13:53:26  

Additional Information
 Earth MOID = 1.48669 au 
 Jupiter MOID = .98161 au 
 T_jup = 3.128 
[ 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 15.0   n/a MPO366550  
diameter diameter 4.367 km 0.822 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.102   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

117645 (2005 ER139)          Discovered 2005-Mar-09 by Mt. Lemmon Survey at Mt. Lemmon
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 2005 ER139 = 1999 GU50 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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