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72557 (2001 EN5)
Classification: Main-belt Asteroid          SPK-ID: 2072557
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0584140004028527 4.8668e-08  
a 2.743950356635647 1.7654e-08 au
q 2.583665239397725 1.3507e-07 au
i 7.209887886149848 5.3288e-06 deg
node 27.78695722293835 3.3059e-05 deg
peri 11.2760673481336 4.795e-05 deg
M 296.2259018814041 3.5586e-05 deg
tp 2459690.606502472069
(2022-Apr-21.10650247)
0.00016473 TDB
period 1660.209144675804
4.55
1.6022e-05
4.387e-08
d
yr
n .2168401500223628 2.0926e-09 deg/d
Q 2.904235473873569 1.8685e-08 au
  Orbit Determination Parameters
   # obs. used (total)      724  
   data-arc span      9384 days (25.69 yr)  
   first obs. used      1994-10-12  
   last obs. used      2020-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55696  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:02:44  

Additional Information
 Earth MOID = 1.59038 au 
 Jupiter MOID = 2.34479 au 
 T_jup = 3.335 
[ 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 15.07   n/a E2021B10  
diameter diameter 5.624 km 0.232 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

72557 (2001 EN5)          Discovered 2001-Mar-02 by LONEOS at Anderson Mesa
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2001 EN5 = 1999 XO256 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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