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3891 Werner (1981 EY31)
Classification: Main-belt Asteroid          SPK-ID: 2003891
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1774596485836999 3.3158e-08  
a 2.40590239925429 7.6064e-09 au
q 1.978951804955943 7.7479e-08 au
i 1.599075378487445 3.5252e-06 deg
node 269.4356746864499 0.00011847 deg
peri 346.6728583005286 0.00011891 deg
M 175.9376611306241 1.1791e-05 deg
tp 2458534.350435590483
(2019-Feb-19.85043559)
4.3648e-05 TDB
period 1363.061448278419
3.73
6.4641e-06
1.77e-08
d
yr
n .2641113505592056 1.2525e-09 deg/d
Q 2.832852993552637 8.9562e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1908  
   data-arc span      17078 days (46.76 yr)  
   first obs. used      1974-06-20  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48853  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:17:01  

Additional Information
 Earth MOID = .962427 au 
 Jupiter MOID = 2.21997 au 
 T_jup = 3.501 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.46   n/a E2021B10  
diameter diameter 3.203 km 0.217 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.328   0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3891 Werner (1981 EY31)          Discovered 1981-Mar-03 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 EY31 = 1974 MF = 1993 PE6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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