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123743 (2001 AT21)
Classification: Main-belt Asteroid          SPK-ID: 2123743
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09196247553895553 6.3473e-08  
a 2.68210377916167 2.0714e-08 au
q 2.435450875977575 1.7283e-07 au
i 4.085556851460718 7.0185e-06 deg
node 40.06473605936779 8.0947e-05 deg
peri 8.777888145540636 9.0235e-05 deg
M 197.4945587327603 3.682e-05 deg
tp 2459724.731150244657
(2022-May-25.23115024)
0.00016511 TDB
period 1604.396825453482
4.39
1.8586e-05
5.089e-08
d
yr
n .2243833908722963 2.5993e-09 deg/d
Q 2.928756682345765 2.2618e-08 au
  Orbit Determination Parameters
   # obs. used (total)      330  
   data-arc span      6961 days (19.06 yr)  
   first obs. used      2001-01-03  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5222  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 06:39:06  

Additional Information
 Earth MOID = 1.4455 au 
 Jupiter MOID = 2.38811 au 
 T_jup = 3.366 
[ 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 15.9   n/a MPO325335  
diameter diameter 4.308 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.050   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

123743 (2001 AT21)          Discovered 2001-Jan-03 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 2001 AT21 = 2004 TY204 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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