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JPL Small-Body Database Browser
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11640 (1997 AT4)
Classification: Main-belt Asteroid          SPK-ID: 2011640
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1226860442224825 4.5191e-08  
a 2.389427931051275 1.013e-08 au
q 2.096278470235883 1.0511e-07 au
i 5.142654129257261 4.5229e-06 deg
node 299.4496017416611 4.4865e-05 deg
peri 88.36074261372261 4.8582e-05 deg
M 93.66531541847448 1.8312e-05 deg
tp 2458249.493119139744
(2018-May-10.99311914)
6.8166e-05 TDB
period 1349.085054004616
3.69
8.5792e-06
2.349e-08
d
yr
n .2668475193104972 1.697e-09 deg/d
Q 2.682577391866666 1.1373e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1361  
   data-arc span      10653 days (29.17 yr)  
   first obs. used      1990-03-02  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52454  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:56:45  

Additional Information
 Earth MOID = 1.10763 au 
 Jupiter MOID = 2.75446 au 
 T_jup = 3.517 
[ 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 14.5   n/a MPO319231  
diameter diameter 3.389 km 0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.222   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11640 (1997 AT4)          Discovered 1997-Jan-06 by Kobayashi, T. at Oizumi
Reference: 19990928/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 AT4 = 1990 EJ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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