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JPL Small-Body Database Browser
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305965 (2009 HJ57)
Classification: Main-belt Asteroid          SPK-ID: 2305965
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1267782686914664 1.2322e-07  
a 3.018904505528575 5.8904e-08 au
q 2.636173018972795 4.035e-07 au
i 11.32879005372877 8.5424e-06 deg
node 189.1418889505697 2.8772e-05 deg
peri 24.78973846050053 4.07e-05 deg
M 37.37093779074068 3.9687e-05 deg
tp 2458801.614104243141
(2019-Nov-14.11410424)
0.00020677 TDB
period 1915.898468306816
5.25
5.6074e-05
1.535e-07
d
yr
n .1879013976759173 5.4994e-09 deg/d
Q 3.401635992084355 6.6372e-08 au
  Orbit Determination Parameters
   # obs. used (total)      159  
   data-arc span      5451 days (14.92 yr)  
   first obs. used      2004-05-19  
   last obs. used      2019-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61557  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:11:49  

Additional Information
 Earth MOID = 1.63569 au 
 Jupiter MOID = 1.56871 au 
 T_jup = 3.205 
[ 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 16.1   n/a MPO433971  
diameter diameter 3.825 km 0.766 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

305965 (2009 HJ57)          Discovered 2009-Apr-22 by La Sagra at La Sagra
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Alternate Designations
 2009 HJ57 = 2004 KF11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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