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JPL Small-Body Database Browser
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74420 (1999 AR22)
Classification: Main-belt Asteroid          SPK-ID: 2074420
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1521677826799893 5.6939e-08  
a 3.131999465841786 2.5383e-08 au
q 2.655410051769731 1.7659e-07 au
i 18.41268408497353 5.7405e-06 deg
node 61.85518851359095 1.6249e-05 deg
peri 165.478622439013 2.2324e-05 deg
M 179.5423126276845 1.6032e-05 deg
tp 2457590.793249077794
(2016-Jul-21.29324908)
8.729e-05 TDB
period 2024.561369473779
5.54
2.4612e-05
6.738e-08
d
yr
n .1778162941504562 2.1617e-09 deg/d
Q 3.608588879913841 2.9246e-08 au
  Orbit Determination Parameters
   # obs. used (total)      818  
   data-arc span      7600 days (20.81 yr)  
   first obs. used      1999-01-14  
   last obs. used      2019-11-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63245  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 06:46:43  

Additional Information
 Earth MOID = 1.6482 au 
 Jupiter MOID = 1.40932 au 
 T_jup = 3.116 
[ 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 13.8   n/a MPO417339  
diameter diameter 5.021 km 0.273 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.335   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74420 (1999 AR22)          Discovered 1999-Jan-14 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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