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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1225736138961139 4.0821e-08  
a 2.389774770524385 8.8554e-09 au
q 2.096851440503455 9.6402e-08 au
i 5.142791388250912 3.4934e-06 deg
node 299.4519701549943 4.4729e-05 deg
peri 88.11143057635272 4.7263e-05 deg
M 254.0654837667194 1.7451e-05 deg
tp 2459597.571641768432
(2022-Jan-18.07164177)		 6.66e-05 TDB
period 1349.37880607159
3.69		 7.5003e-06
2.053e-08		 d
yr
n .2667894281280868 1.4829e-09 deg/d
Q 2.682698100545315 9.9409e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1548  
   data-arc span      11091 days (30.37 yr)  
   first obs. used      1990-03-02  
   last obs. used      2020-07-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51663  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:58:15  

Additional Information
 Earth MOID = 1.1076 au 
 Jupiter MOID = 2.75606 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 14.56   n/a E2021B10  
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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