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46526 (1981 EN5)
Classification: Main-belt Asteroid          SPK-ID: 2046526
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09368421060723049 5.5818e-08  
a 2.481454414644616 1.2548e-08 au
q 2.248981316650808 1.3574e-07 au
i 5.167100888831896 3.5117e-06 deg
node 244.647713313754 7.99e-05 deg
peri 230.7709457228787 9.3463e-05 deg
M 166.26918715337 4.8092e-05 deg
tp 2458737.072352115611
(2019-Sep-10.57235212)
0.00018988 TDB
period 1427.768772450924
3.91
1.0829e-05
2.965e-08
d
yr
n .2521416681372152 1.9124e-09 deg/d
Q 2.713927512638424 1.3723e-08 au
  Orbit Determination Parameters
   # obs. used (total)      791  
   data-arc span      15218 days (41.66 yr)  
   first obs. used      1979-10-18  
   last obs. used      2021-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57921  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:21:07  

Additional Information
 Earth MOID = 1.26999 au 
 Jupiter MOID = 2.38108 au 
 T_jup = 3.466 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09412563367202732 5.6922e-08  
q 2.248090947951598 1.3931e-07 au
tp 2457312.447030522726
(2015-Oct-16.94703052)
0.00018646 TDB
node 244.7147631088671 7.9949e-05 deg
peri 231.4044034616633 9.3124e-05 deg
i 5.16521166998724 3.5095e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      791  
   data-arc span      15218 days (41.66 yr)  
   first obs. used      1979-10-18  
   last obs. used      2021-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57921  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:21:07  

Additional Information
 Jupiter MOID = 2.38108 au 
 T_jup = 3.466 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.240079277827559E-15 -7.904229625130947E-15 7.927580126619684E-12 1.177044803929597E-13 1.999994103806022E-12 -9.11793800991421E-15
q -7.904229625130947E-15 1.940782208876787E-14 -1.964804224799942E-11 -2.864514678140276E-13 -4.964388638983327E-12 2.232208801524771E-14
tp 7.927580126619684E-12 -1.964804224799942E-11 3.476791501346715E-8 4.300904611006699E-10 8.993620889134527E-9 -2.981293372575085E-11
node 1.177044803929597E-13 -2.864514678140276E-13 4.300904611006699E-10 6.391780807814396E-9 -6.249609624897199E-9 -8.439066771265635E-11
peri 1.999994103806022E-12 -4.964388638983327E-12 8.993620889134527E-9 -6.249609624897199E-9 8.672169621753329E-9 7.604145269942342E-11
i -9.11793800991421E-15 2.232208801524771E-14 -2.981293372575085E-11 -8.439066771265635E-11 7.604145269942342E-11 1.231686395022912E-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 15.73   n/a E2021B10  

46526 (1981 EN5)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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