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74422 (1999 AP28)
Classification: Main-belt Asteroid          SPK-ID: 2074422
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09538918572276446 4.6335e-08  
a 3.183854255693884 3.3084e-08 au
q 2.880148990783286 1.4709e-07 au
i 18.28712856676886 5.6042e-06 deg
node 295.1425382431365 1.941e-05 deg
peri 309.2501429014991 3.9091e-05 deg
M 91.42681167680276 3.4952e-05 deg
tp 2458073.513766993849
(2017-Nov-16.01376699)
0.00020114 TDB
period 2075.048231506358
5.68
3.2343e-05
8.855e-08
d
yr
n .1734899432861192 2.7041e-09 deg/d
Q 3.487559520604481 3.624e-08 au
  Orbit Determination Parameters
   # obs. used (total)      742  
   data-arc span      7637 days (20.91 yr)  
   first obs. used      1998-12-14  
   last obs. used      2019-11-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52562  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 06:46:43  

Additional Information
 Earth MOID = 1.89905 au 
 Jupiter MOID = 1.78514 au 
 T_jup = 3.113 
[ 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 14.1   n/a MPO410544  
diameter diameter 8.251 km 0.238 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.059   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74422 (1999 AP28)          Discovered 1999-Jan-13 by Spacewatch at Kitt Peak
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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