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JPL Small-Body Database Browser
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56216 (1999 HJ2)
Classification: Main-belt Asteroid          SPK-ID: 2056216
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1598232490333058 3.8148e-08  
a 2.599539263994769 1.2344e-08 au
q 2.184072452833477 1.0192e-07 au
i 9.791601982417964 5.0355e-06 deg
node 54.99424435962641 2.2832e-05 deg
peri 216.134274212596 2.788e-05 deg
M 318.3950696622937 1.6976e-05 deg
tp 2459177.423408453474
(2020-Nov-23.92340845)
7.2389e-05 TDB
period 1530.886520570052
4.19
1.0904e-05
2.985e-08
d
yr
n .2351578612541103 1.675e-09 deg/d
Q 3.015006075156061 1.4317e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1129  
   data-arc span      9102 days (24.92 yr)  
   first obs. used      1995-05-27  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53066  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 11:05:29  

Additional Information
 Earth MOID = 1.17666 au 
 Jupiter MOID = 2.09171 au 
 T_jup = 3.377 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO385178  

56216 (1999 HJ2)          Discovered 1999-Apr-19 by Lopez, A., Pacheco, R. at Mallorca
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 HJ2 = 2000 QF68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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