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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1596561103437278 4.401e-08  
a 2.600142109742979 1.4799e-08 au
q 2.18501353416048 1.1379e-07 au
i 9.791487536760796 5.5872e-06 deg
node 54.99993037752192 2.5101e-05 deg
peri 216.0327531535024 3.0016e-05 deg
M 224.4304427210285 1.7903e-05 deg
tp 2459177.205019110610
(2020-Nov-23.70501911)
7.7612e-05 TDB
period 1531.41908144317
4.19
1.3074e-05
3.579e-08
d
yr
n .2350760835895719 2.0069e-09 deg/d
Q 3.015270685325476 1.7161e-08 au
  Orbit Determination Parameters
   # obs. used (total)      954  
   data-arc span      8710 days (23.85 yr)  
   first obs. used      1995-05-27  
   last obs. used      2019-04-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55952  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 03:23:54  

Additional Information
 Earth MOID = 1.17716 au 
 Jupiter MOID = 2.09055 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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