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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05841400292855202 4.643e-08  
a 2.743950355276188 1.6614e-08 au
q 2.583665231187283 1.3058e-07 au
i 7.209887222031161 5.0715e-06 deg
node 27.78695446987892 3.2358e-05 deg
peri 11.2760709550079 4.7133e-05 deg
M 296.2259016031072 3.4687e-05 deg
tp 2459690.606503536921
(2022-Apr-21.10650354)
0.00016038 TDB
period 1660.209143442006
4.55
1.5078e-05
4.128e-08
d
yr
n .2168401501835093 1.9694e-09 deg/d
Q 2.904235479365092 1.7584e-08 au
  Orbit Determination Parameters
   # obs. used (total)      751  
   data-arc span      9797 days (26.82 yr)  
   first obs. used      1994-10-12  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55577  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 01:43:20  

Additional Information
 Earth MOID = 1.59038 au 
 Jupiter MOID = 2.34479 au 
 T_jup = 3.335 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457004.5 (2014-Dec-13.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06012200945532407 4.632e-08  
q 2.576179514060633 1.306e-07 au
tp 2456384.079914637469
(2013-Apr-01.57991464)
0.00015459 TDB
node 27.92537876178496 3.2362e-05 deg
peri 13.25540218570172 4.65e-05 deg
i 7.212040229839253 5.0732e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      751  
   data-arc span      9797 days (26.82 yr)  
   first obs. used      1994-10-12  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55577  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 01:43:20  

Additional Information
 Jupiter MOID = 2.34479 au 
 T_jup = 3.335 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.145576291363589E-15 -6.008663697347689E-15 -1.595527677983688E-13 3.031653130019931E-16 -5.958690382907008E-14 -1.736385257117285E-15
q -6.008663697347689E-15 1.70560305760254E-14 3.139892584729166E-13 -1.843818079780751E-15 1.559477610826972E-13 5.477054487827404E-15
tp -1.595527677983688E-13 3.139892584729166E-13 2.38988305131944E-8 1.061557976576619E-11 5.174631259305555E-9 6.243015042388407E-13
node 3.031653130019931E-16 -1.843818079780751E-15 1.061557976576619E-11 1.047329353113764E-9 -1.036304867656006E-9 1.295559746738666E-11
peri -5.958690382907008E-14 1.559477610826972E-13 5.174631259305555E-9 -1.036304867656006E-9 2.162209199939322E-9 -1.262554551996641E-11
i -1.736385257117285E-15 5.477054487827404E-15 6.243015042388407E-13 1.295559746738666E-11 -1.262554551996641E-11 2.573776619121629E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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

Alternate Designations
 2001 EN5 = 1999 XO256 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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