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11642 (1997 AN21)
Classification: Main-belt Asteroid          SPK-ID: 2011642
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1313666020367421 5.9229e-08  
a 2.570280086838153 1.3916e-08 au
q 2.232631125547523 1.5396e-07 au
i 13.18224506844269 5.5955e-06 deg
node 311.4155753325559 3.0114e-05 deg
peri 118.6712640772347 3.9139e-05 deg
M 190.3984496456794 2.4261e-05 deg
tp 2459309.581935268168
(2021-Apr-05.08193527)
0.00010284 TDB
period 1505.112990790756
4.12
1.2224e-05
3.347e-08
d
yr
n .2391847005525235 1.9426e-09 deg/d
Q 2.907929048128784 1.5745e-08 au
  Orbit Determination Parameters
   # obs. used (total)      903  
   data-arc span      9576 days (26.22 yr)  
   first obs. used      1993-02-15  
   last obs. used      2019-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52588  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:56:45  

Additional Information
 Earth MOID = 1.28004 au 
 Jupiter MOID = 2.36209 au 
 T_jup = 3.381 
[ 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 13.9   n/a MPO439169  
diameter diameter 4.573 km 0.307 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.169   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11642 (1997 AN21)          Discovered 1997-Jan-13 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 19990928/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 AN21 = 1993 CY 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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