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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .151886320196071 5.6346e-08  
a 3.132410650469867 2.5186e-08 au
q 2.656640323427018 1.7519e-07 au
i 18.40933697365863 5.6857e-06 deg
node 61.85253330498782 1.578e-05 deg
peri 165.5357686832692 2.1774e-05 deg
M 250.5732595820475 1.6199e-05 deg
tp 2459616.013278952498
(2022-Feb-05.51327895)
9.4129e-05 TDB
period 2024.96007444398
5.54
2.4422e-05
6.686e-08
d
yr
n .177781282971147 2.1441e-09 deg/d
Q 3.608180977512716 2.9011e-08 au
  Orbit Determination Parameters
   # obs. used (total)      860  
   data-arc span      7660 days (20.97 yr)  
   first obs. used      1999-01-14  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61404  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 11:48:40  

Additional Information
 Earth MOID = 1.64939 au 
 Jupiter MOID = 1.40956 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 13.9   n/a MPO502606  
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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