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118375 (1999 HB4)
Classification: Main-belt Asteroid          SPK-ID: 2118375
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09363948883015295 5.7528e-08  
a 2.753547246549712 1.7626e-08 au
q 2.495706489913121 1.5664e-07 au
i 1.33457569114525 5.3969e-06 deg
node 46.14189673088622 0.00021521 deg
peri 317.1874773926928 0.00021672 deg
M 125.0957509352479 2.631e-05 deg
tp 2458620.567719138615
(2019-May-17.06771914)
0.00012071 TDB
period 1668.926558649982
4.57
1.6025e-05
4.387e-08
d
yr
n .215707514590222 2.0712e-09 deg/d
Q 3.011388003186302 1.9277e-08 au
  Orbit Determination Parameters
   # obs. used (total)      381  
   data-arc span      8839 days (24.20 yr)  
   first obs. used      1996-11-06  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57449  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:36:58  

Additional Information
 Earth MOID = 1.49175 au 
 Jupiter MOID = 2.41882 au 
 T_jup = 3.338 
[ 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 16.3   n/a MPO502794  

118375 (1999 HB4)          Discovered 1999-Apr-16 by Spacewatch at Kitt Peak
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

Alternate Designations
 1999 HB4 = 2003 FM123 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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