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120154 (2003 HP4)
Classification: Main-belt Asteroid          SPK-ID: 2120154
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06507342411481877 4.018e-08  
a 3.148259079797226 2.8024e-08 au
q 2.943391081474252 1.3636e-07 au
i 11.11104147868612 4.9908e-06 deg
node 87.15196122815878 2.3452e-05 deg
peri 211.6095044891539 4.8946e-05 deg
M 316.6619831630475 4.1357e-05 deg
tp 2459246.123919309536
(2021-Jan-31.62391931)
0.0002343 TDB
period 2040.347422543732
5.59
2.7243e-05
7.459e-08
d
yr
n .1764405394994851 2.3558e-09 deg/d
Q 3.3531270781202 2.9847e-08 au
  Orbit Determination Parameters
   # obs. used (total)      524  
   data-arc span      7548 days (20.67 yr)  
   first obs. used      1999-10-16  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60529  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 01:56:01  

Additional Information
 Earth MOID = 1.9335 au 
 Jupiter MOID = 1.79396 au 
 T_jup = 3.176 
[ 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 14.7   n/a MPO432703  
diameter diameter 4.786 km 0.394 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.102   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120154 (2003 HP4)          Discovered 2003-Apr-24 by LONEOS at Anderson Mesa
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

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