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74415 (1999 AR9)
Classification: Outer Main-belt Asteroid          SPK-ID: 2074415
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1439350674057032 7.2655e-08  
a 3.2075091090303 2.6142e-08 au
q 2.745836069217617 2.3775e-07 au
i 25.3700329756567 9.9104e-06 deg
node 337.3787704369435 9.2938e-06 deg
peri 40.03259165117191 2.7782e-05 deg
M 16.7668485090866 2.4575e-05 deg
tp 2458902.776454734087
(2020-Feb-23.27645473)
0.00014333 TDB
period 2098.21638673857
5.74
2.5652e-05
7.023e-08
d
yr
n .1715742962810321 2.0976e-09 deg/d
Q 3.669182148842983 2.9905e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1091  
   data-arc span      8535 days (23.37 yr)  
   first obs. used      1996-09-13  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47075  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:15:33  

Additional Information
 Earth MOID = 1.77953 au 
 Jupiter MOID = 1.87795 au 
 T_jup = 3.026 
[ 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 13.0   n/a MPO400701  
diameter diameter 8.796 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.173   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74415 (1999 AR9)          Discovered 1999-Jan-10 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 AR9 = 1999 FC63 = 2002 PW45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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