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JPL Small-Body Database Browser
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172129 (2002 HR16)
Classification: Main-belt Asteroid          SPK-ID: 2172129
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1124753611616487 6.5147e-08  
a 2.271822905413855 1.2565e-08 au
q 2.016298803632126 1.4461e-07 au
i 5.001479079211596 4.5345e-06 deg
node 261.4432882330912 8.1761e-05 deg
peri 255.1527333064548 8.6213e-05 deg
M 149.5470657677979 2.5042e-05 deg
tp 2458480.940209166612
(2018-Dec-28.44020917)
8.6786e-05 TDB
period 1250.720124395082
3.42
1.0376e-05
2.841e-08
d
yr
n .2878341788688464 2.3879e-09 deg/d
Q 2.527347007195585 1.3978e-08 au
  Orbit Determination Parameters
   # obs. used (total)      268  
   data-arc span      6243 days (17.09 yr)  
   first obs. used      2002-04-18  
   last obs. used      2019-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58412  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 19:12:16  

Additional Information
 Earth MOID = 1.03282 au 
 Jupiter MOID = 2.48323 au 
 T_jup = 3.599 
[ 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 17.0   n/a MPO427051  

172129 (2002 HR16)          Discovered 2002-Apr-18 by NEAT at Palomar
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

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