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3667 Anne-Marie (1981 EF)
Classification: Main-belt Asteroid          SPK-ID: 2003667
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2312688307025979 1.3697e-08  
a 3.080742162379919 1.5174e-08 au
q 2.368262524790122 4.6588e-08 au
i 16.24150635940676 5.7387e-07 deg
node .1020710504690405 3.2258e-06 deg
peri 73.8094799953352 5.6199e-06 deg
M 178.3489080778693 6.893e-06 deg
tp 2458222.025731432128
(2018-Apr-13.52573143)
3.3706e-05 TDB
period 1975.065283442256
5.41
1.4592e-05
3.995e-08
d
yr
n .1822724560134901 1.3466e-09 deg/d
Q 3.793221799969715 1.8683e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2012  
   data-arc span      14936 days (40.89 yr)  
   first obs. used      1979-09-23  
   last obs. used      2020-08-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44406  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:23:59  

Additional Information
 Earth MOID = 1.44056 au 
 Jupiter MOID = 1.91858 au 
 T_jup = 3.126 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.24   n/a E2021B10  
diameter diameter 22.307 km 0.439 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3667 Anne-Marie (1981 EF)          Discovered 1981-Mar-09 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 EF = 1979 SC7 = 1985 YO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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