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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2241778761210554 6.8295e-08  
a 2.581357031172262 3.9756e-08 au
q 2.002673894413911 1.8445e-07 au
i 5.731462202562545 4.2174e-06 deg
node 129.3597488347761 6.9989e-05 deg
peri 211.6743659983229 7.1868e-05 deg
M 162.9569265345891 1.5323e-05 deg
tp 2457914.789395300569
(2017-Jun-10.28939530)
6.9372e-05 TDB
period 1514.853175875268
4.15
3.4996e-05
9.581e-08
d
yr
n .2376467935857846 5.4901e-09 deg/d
Q 3.160040167930612 4.8669e-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 = .995726 au 
 Jupiter MOID = 2.24085 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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