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JPL Small-Body Database Browser
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173609 (2001 EC21)
Classification: Main-belt Asteroid          SPK-ID: 2173609
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04762755707638473 5.7589e-08  
a 2.275831481278126 1.4154e-08 au
q 2.167439187507318 1.3027e-07 au
i 6.449573133962858 6.5721e-06 deg
node 323.4110334647201 4.8556e-05 deg
peri 171.068740853536 8.6783e-05 deg
M 130.24311328211 6.906e-05 deg
tp 2458146.808287689450
(2018-Jan-28.30828769)
0.00024089 TDB
period 1254.031881731997
3.43
1.1699e-05
3.203e-08
d
yr
n .2870740411342562 2.6781e-09 deg/d
Q 2.384223775048933 1.4828e-08 au
  Orbit Determination Parameters
   # obs. used (total)      469  
   data-arc span      9353 days (25.61 yr)  
   first obs. used      1992-09-30  
   last obs. used      2018-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55987  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 12:32:18  

Additional Information
 Earth MOID = 1.18169 au 
 Jupiter MOID = 2.62258 au 
 T_jup = 3.599 
[ 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 16.4   n/a MPO385762  

173609 (2001 EC21)          Discovered 2001-Mar-15 by LONEOS at Anderson Mesa
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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