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238752 (2005 HF4)
Classification: Main-belt Asteroid          SPK-ID: 2238752
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04415414495573695 5.4086e-08  
a 3.075270251405322 3.6796e-08 au
q 2.939484322946706 1.6694e-07 au
i 22.97137698865703 5.9597e-06 deg
node 50.72514666113226 1.4384e-05 deg
peri 48.26017427888939 8.4025e-05 deg
M 37.81079137716428 7.8347e-05 deg
tp 2458793.611369889848
(2019-Nov-06.11136989)
0.00042928 TDB
period 1969.805553571055
5.39
3.5353e-05
9.679e-08
d
yr
n .1827591557691352 3.2801e-09 deg/d
Q 3.211056179863939 3.842e-08 au
  Orbit Determination Parameters
   # obs. used (total)      327  
   data-arc span      6326 days (17.32 yr)  
   first obs. used      2002-10-09  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54724  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 08:24:37  

Additional Information
 Earth MOID = 1.98114 au 
 Jupiter MOID = 1.9891 au 
 T_jup = 3.106 
[ 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 15.1   n/a MPO413129  
diameter diameter 5.400 km 0.356 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

238752 (2005 HF4)          Discovered 2005-Apr-30 by Lowe, A. at Mayhill
Reference: 20100428/Numbers.arcLast Updated: 2010-05-03

Alternate Designations
 2005 HF4 = 2002 VZ57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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