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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1227478097663225 4.0812e-08  
a 2.389094842533101 8.9356e-09 au
q 2.095838683288145 9.6245e-08 au
i 5.142842554140091 3.4968e-06 deg
node 299.4520310834469 4.4744e-05 deg
peri 88.23686943957871 4.727e-05 deg
M 200.5611950848098 1.7267e-05 deg
tp 2459597.865370336587
(2022-Jan-18.36537034)
6.6468e-05 TDB
period 1348.802968233254
3.69
7.5671e-06
2.072e-08
d
yr
n .2669033272306262 1.4974e-09 deg/d
Q 2.682351001778056 1.0032e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1537  
   data-arc span      11064 days (30.29 yr)  
   first obs. used      1990-03-02  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51646  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 17:17:52  

Additional Information
 Earth MOID = 1.10787 au 
 Jupiter MOID = 2.7555 au 
 T_jup = 3.518 
[ 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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