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72550 (2001 EJ1)
Classification: Main-belt Asteroid          SPK-ID: 2072550
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1456193039202821 4.5881e-08  
a 2.773050588380886 1.7224e-08 au
q 2.369240891965133 1.2005e-07 au
i 8.570981779516758 4.3472e-06 deg
node 84.93315332903623 3.0033e-05 deg
peri 88.8176774221043 3.4327e-05 deg
M 90.13592439898326 1.5973e-05 deg
tp 2458778.190810541290
(2019-Oct-21.69081054)
7.3732e-05 TDB
period 1686.68939958029
4.62
1.5714e-05
4.302e-08
d
yr
n .2134358584867974 1.9885e-09 deg/d
Q 3.17686028479664 1.9732e-08 au
  Orbit Determination Parameters
   # obs. used (total)      946  
   data-arc span      8441 days (23.11 yr)  
   first obs. used      1997-06-08  
   last obs. used      2020-07-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52097  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:02:42  

Additional Information
 Earth MOID = 1.39289 au 
 Jupiter MOID = 1.85468 au 
 T_jup = 3.305 
[ 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 14.75   n/a E2021B10  
diameter diameter 5.507 km 0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.133   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

72550 (2001 EJ1)          Discovered 2001-Mar-01 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2001 EJ1 = 1997 LE16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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