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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1262781864261926 1.229e-07  
a 3.017112659979176 6.0792e-08 au
q 2.636117145033499 4.0385e-07 au
i 11.33115331311899 8.5441e-06 deg
node 189.1593527694925 2.8768e-05 deg
peri 24.61396881568556 4.075e-05 deg
M 322.3023061327433 3.8031e-05 deg
tp 2458800.946279734575
(2019-Nov-13.44627973)
0.00020681 TDB
period 1914.192973144284
5.24
5.7854e-05
1.584e-07
d
yr
n .1880688128369097 5.6841e-09 deg/d
Q 3.398108174924852 6.8469e-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 = 1.63584 au 
 Jupiter MOID = 1.5729 au 
 T_jup = 3.206 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457171.5 (2015-May-29.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1259691779945848 1.2314e-07  
q 2.638102732169864 4.0451e-07 au
tp 2456882.815127678486
(2014-Aug-13.31512768)
0.00016556 TDB
node 189.1781837717609 2.8766e-05 deg
peri 24.12542406546212 4.0615e-05 deg
i 11.32972926778499 8.5434e-06 deg
  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
 Jupiter MOID = 1.5729 au 
 T_jup = 3.206 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.516459452842107E-14 -4.952700215733415E-14 -1.256903720520472E-11 -4.536315581330188E-14 -1.758360765112747E-12 1.119202230166795E-14
q -4.952700215733415E-14 1.636299553656284E-13 4.317311090693143E-11 1.383199691065554E-13 6.176477783901334E-12 -2.337182155184075E-14
tp -1.256903720520472E-11 4.317311090693143E-11 2.741115294367007E-8 2.775218034002315E-11 4.725583995189197E-9 1.224211870633164E-11
node -4.536315581330188E-14 1.383199691065554E-13 2.775218034002315E-11 8.274949181805002E-10 -8.074961305293732E-10 2.230265142358983E-11
peri -1.758360765112747E-12 6.176477783901334E-12 4.725583995189197E-9 -8.074961305293732E-10 1.649574018623138E-9 -1.870409902468445E-11
i 1.119202230166795E-14 -2.337182155184075E-14 1.224211870633164E-11 2.230265142358983E-11 -1.870409902468445E-11 7.299026311418154E-11

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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