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JPL Small-Body Database Browser
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523589 (2001 HA4)
Classification: Apollo [NEO, PHA]          SPK-ID: 2523589
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7953709444970962 1.3001e-07  
a 2.68318077752195 2.5999e-08 au
q .5490567482478635 3.5236e-07 au
i 17.20206910425893 3.2106e-05 deg
node 354.6213994561727 5.5385e-05 deg
peri 95.07235121142068 5.2101e-05 deg
M 47.49178866720163 1.8085e-05 deg
tp 2458388.717849660958
(2018-Sep-27.21784966)
7.822e-05 TDB
period 1605.36329040621
4.40
2.3333e-05
6.388e-08
d
yr
n .2242483070040228 3.2593e-09 deg/d
Q 4.817304806796035 4.6677e-08 au
  Orbit Determination Parameters
   # obs. used (total)      124  
   data-arc span      6306 days (17.26 yr)  
   first obs. used      2001-04-16  
   last obs. used      2018-07-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .31912  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 12:51:45  

Additional Information
 Earth MOID = .0182441 au 
 Jupiter MOID = 1.54622 au 
 T_jup = 2.771 
[ 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 17.7   n/a MPO254717  
diameter diameter 1.851 km 0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
geometric albedo albedo 0.047   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  

523589 (2001 HA4)          Discovered 2001-Apr-16 by LINEAR at Socorro
Reference: Last Updated: 2018-10-01

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