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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09504358309983393 4.5791e-08  
a 3.185090218857846 3.2933e-08 au
q 2.882367831961362 1.4552e-07 au
i 18.28696765940789 5.4881e-06 deg
node 295.1372037143918 1.9376e-05 deg
peri 309.415179813788 3.881e-05 deg
M 160.6528481494089 3.4601e-05 deg
tp 2458073.954047821532
(2017-Nov-16.45404782)
0.00019889 TDB
period 2076.256640492532
5.68
3.2202e-05
8.816e-08
d
yr
n .1733889698311093 2.6892e-09 deg/d
Q 3.48781260575433 3.6063e-08 au
  Orbit Determination Parameters
   # obs. used (total)      757  
   data-arc span      7692 days (21.06 yr)  
   first obs. used      1998-12-14  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52242  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:15:54  

Additional Information
 Earth MOID = 1.90136 au 
 Jupiter MOID = 1.78588 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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