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226721 (2004 PA40)
Classification: Main-belt Asteroid          SPK-ID: 2226721
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1142238427853183 6.9185e-08  
a 2.717391950975817 2.2133e-08 au
q 2.407000999981466 1.8141e-07 au
i 4.263261086819428 6.2564e-06 deg
node 169.2605568385562 6.8808e-05 deg
peri 190.0820434749224 7.2536e-05 deg
M 169.0933984248624 2.6248e-05 deg
tp 2458231.987376178550
(2018-Apr-23.48737618)
0.00011568 TDB
period 1636.164079454938
4.48
1.9989e-05
5.473e-08
d
yr
n .2200268325899981 2.6881e-09 deg/d
Q 3.027782901970169 2.4661e-08 au
  Orbit Determination Parameters
   # obs. used (total)      356  
   data-arc span      10318 days (28.25 yr)  
   first obs. used      1991-11-02  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66729  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 05:56:51  

Additional Information
 Earth MOID = 1.40342 au 
 Jupiter MOID = 2.41381 au 
 T_jup = 3.347 
[ 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 16.0   n/a MPO454628  
diameter diameter 3.257 km 0.163 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.080   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

226721 (2004 PA40)          Discovered 2004-Aug-09 by LONEOS at Anderson Mesa
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

[ show close-approach data ]
Alternate Designations
 2004 PA40 = 2002 CE277 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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