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101889 (1999 NE55)
Classification: Main-belt Asteroid          SPK-ID: 2101889
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 .09679460967704175 5.5943e-08  
a 3.153622803217948 2.9241e-08 au
q 2.848369114911848 1.8433e-07 au
i 20.59732834090815 5.5651e-06 deg
node 267.7459936835398 1.7594e-05 deg
peri 101.2285540817444 3.5616e-05 deg
M 220.5655055920306 3.2665e-05 deg
tp 2459792.783795114808
(2022-Aug-01.28379511)
0.00019145 TDB
period 2045.563886127082
5.60
2.845e-05
7.789e-08
d
yr
n .1759905923454667 2.4477e-09 deg/d
Q 3.458876491524048 3.2071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      876  
   data-arc span      7680 days (21.03 yr)  
   first obs. used      1999-07-12  
   last obs. used      2020-07-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52247  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:58  

Additional Information
 Earth MOID = 1.93787 au 
 Jupiter MOID = 2.05847 au 
 T_jup = 3.101 
[ 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 13.5   n/a MPO385429  
diameter diameter 10.029 km 0.221 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.092   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101889 (1999 NE55)          Discovered 1999-Jul-12 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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