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3806 Tremaine (1981 EW32)
Classification: Main-belt Asteroid          SPK-ID: 2003806
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3083223584163324 5.0508e-08  
a 2.544507774650039 1.2429e-08 au
q 1.759979136561245 1.2268e-07 au
i 9.997488185512022 3.8911e-06 deg
node 199.3443201177645 3.0131e-05 deg
peri 189.0126887064883 3.2216e-05 deg
M 53.36305007107259 1.4998e-05 deg
tp 2458980.743239721607
(2020-May-11.24323972)
6.1046e-05 TDB
period 1482.532081559318
4.06
1.0862e-05
2.974e-08
d
yr
n .2428277974405479 1.7791e-09 deg/d
Q 3.329036412738832 1.6261e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1333  
   data-arc span      15153 days (41.49 yr)  
   first obs. used      1979-09-24  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50439  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:12:56  

Additional Information
 Earth MOID = .764101 au 
 Jupiter MOID = 2.1234 au 
 T_jup = 3.355 
[ 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 14.39   n/a MPCxxxxx  
diameter diameter 4.758 km 0.680 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.113   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3806 Tremaine (1981 EW32)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 EW32 = 1975 TY5 = 1979 SC11 = 1979 TL2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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