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101559 (1999 AJ9)
Classification: Main-belt Asteroid          SPK-ID: 2101559
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1842224232405328 4.0341e-08  
a 3.119560728288822 1.5815e-08 au
q 2.544867691477454 1.2601e-07 au
i 2.185242071194948 4.463e-06 deg
node 206.2129090218937 0.00010737 deg
peri 252.6631629808239 0.00010837 deg
M 1.314064189632078 1.2443e-05 deg
tp 2459193.153970416419
(2020-Dec-09.65397042)
6.9549e-05 TDB
period 2012.512532458298
5.51
1.5304e-05
4.19e-08
d
yr
n .17888087363126 1.3603e-09 deg/d
Q 3.694253765100189 1.8728e-08 au
  Orbit Determination Parameters
   # obs. used (total)      870  
   data-arc span      8090 days (22.15 yr)  
   first obs. used      1999-01-09  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4832  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:37:23  

Additional Information
 Earth MOID = 1.5626 au 
 Jupiter MOID = 1.49178 au 
 T_jup = 3.189 
[ 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 14.9   n/a MPO412743  
diameter diameter 5.374 km 0.188 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101559 (1999 AJ9)          Discovered 1999-Jan-09 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 AJ9 = 2002 QN22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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