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46531 (1981 EV11)
Classification: Main-belt Asteroid          SPK-ID: 2046531
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05082367481007661 3.0645e-08  
a 2.228389818111911 6.7924e-09 au
q 2.115134858646105 6.8489e-08 au
i 7.388249994051992 4.6641e-06 deg
node 213.3106479382851 2.3267e-05 deg
peri 110.2300673194261 5.3809e-05 deg
M 257.7599681056855 5.0128e-05 deg
tp 2459741.567176712319
(2022-Jun-11.06717671)
0.00016974 TDB
period 1215.024891080289
3.33
5.5553e-06
1.521e-08
d
yr
n .2962902263507712 1.3547e-09 deg/d
Q 2.341644777577716 7.1376e-09 au
  Orbit Determination Parameters
   # obs. used (total)      788  
   data-arc span      14737 days (40.35 yr)  
   first obs. used      1981-02-02  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5396  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 21:24:10  

Additional Information
 Earth MOID = 1.11647 au 
 Jupiter MOID = 2.77991 au 
 T_jup = 3.631 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457813.5 (2017-Mar-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05134668185357348 3.0551e-08  
q 2.113909844921089 6.833e-08 au
tp 2457309.254815201090
(2015-Oct-13.75481520)
0.00016476 TDB
node 213.3335591469712 2.3263e-05 deg
peri 109.6654672492651 5.3476e-05 deg
i 7.388458389485422 4.6651e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      788  
   data-arc span      14737 days (40.35 yr)  
   first obs. used      1981-02-02  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5396  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 21:24:10  

Additional Information
 Jupiter MOID = 2.77991 au 
 T_jup = 3.631 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.333799942651719E-16 -2.078290722914046E-15 1.72871517779364E-12 4.804652591266784E-15 5.131914252239651E-13 6.472223028347331E-16
q -2.078290722914046E-15 4.669032856222201E-15 -3.532524685693772E-12 -1.095066722021081E-14 -1.047000131408959E-12 -1.090309349792017E-15
tp 1.72871517779364E-12 -3.532524685693772E-12 2.714703291372256E-8 8.084840730350748E-12 7.938190397455668E-9 7.044899903175463E-12
node 4.804652591266784E-15 -1.095066722021081E-14 8.084840730350748E-12 5.411833363167553E-10 -5.339303101414444E-10 -1.325869139669978E-11
peri 5.131914252239651E-13 -1.047000131408959E-12 7.938190397455668E-9 -5.339303101414444E-10 2.859660274845077E-9 1.527270255680454E-11
i 6.472223028347331E-16 -1.090309349792017E-15 7.044899903175463E-12 -1.325869139669978E-11 1.527270255680454E-11 2.176327327218228E-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 16.16   n/a MPO636723  

46531 (1981 EV11)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EV11 = 1999 VW80 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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