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JPL Small-Body Database Browser
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379881 (2012 HH55)
Classification: Main-belt Asteroid          SPK-ID: 2379881
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .224474766683812 6.8304e-08  
a 2.580942306808238 3.9545e-08 au
q 2.00158588466308 1.8443e-07 au
i 5.731844211504804 4.218e-06 deg
node 129.3632806900821 6.999e-05 deg
peri 211.6511896326982 7.1863e-05 deg
M 258.0724036298815 1.5027e-05 deg
tp 2459429.300372510182
(2021-Aug-02.80037251)
6.3451e-05 TDB
period 1514.488122952742
4.15
3.4807e-05
9.53e-08
d
yr
n .2377040760795939 5.4631e-09 deg/d
Q 3.160298728953397 4.8422e-08 au
  Orbit Determination Parameters
   # obs. used (total)      305  
   data-arc span      4375 days (11.98 yr)  
   first obs. used      2007-02-17  
   last obs. used      2019-02-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50375  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 15:06:03  

Additional Information
 Earth MOID = .995542 au 
 Jupiter MOID = 2.24401 au 
 T_jup = 3.382 
[ 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 MPO434349  

379881 (2012 HH55)          Discovered 2007-Feb-17 by Spacewatch at Kitt Peak
Reference: Last Updated: 2013-11-20

[ show close-approach data ]
Alternate Designations
 2012 HH55 = 2009 WX251 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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