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173171 (1997 EE44)
Classification: Main-belt Asteroid          SPK-ID: 2173171
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05894619786413637 6.588e-08  
a 3.095499413778451 3.077e-08 au
q 2.913031492845548 2.0553e-07 au
i 9.69301237030114 8.1355e-06 deg
node 319.7249137598521 3.9432e-05 deg
peri 80.47236231627612 7.7815e-05 deg
M 204.8056706763369 6.7694e-05 deg
tp 2459858.066611186286
(2022-Oct-05.56661119)
0.00037801 TDB
period 1989.273586041978
5.45
2.9661e-05
8.121e-08
d
yr
n .1809705826920898 2.6984e-09 deg/d
Q 3.277967334711354 3.2584e-08 au
  Orbit Determination Parameters
   # obs. used (total)      371  
   data-arc span      8062 days (22.07 yr)  
   first obs. used      1997-03-11  
   last obs. used      2019-04-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63625  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:19:01  

Additional Information
 Earth MOID = 1.94019 au 
 Jupiter MOID = 1.99186 au 
 T_jup = 3.199 
[ 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 15.1   n/a MPO264383  
diameter diameter 4.548 km 1.417 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.085   0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173171 (1997 EE44)          Discovered 1997-Mar-11 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

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