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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 
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Orbital Elements at Epoch 2457815.5 (2017-Mar-03.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04454713788766314 5.393e-08  
q 2.936756394837747 1.6656e-07 au
tp 2458798.977069157930
(2019-Nov-11.47706916)
0.00042577 TDB
node 50.73621698767967 1.4383e-05 deg
peri 49.36813571398831 8.3477e-05 deg
i 22.97550048470078 5.9604e-06 deg
  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
 Jupiter MOID = 1.9891 au 
 T_jup = 3.106 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.908393093020588E-15 -8.783454583543952E-15 -2.314430718742444E-12 8.794668198229739E-15 -4.775360493229176E-13 -1.760976897656523E-14
q -8.783454583543952E-15 2.774306651223161E-14 4.633684666116384E-12 -2.211285368886325E-14 8.671110581346988E-13 5.955914672066328E-14
tp -2.314430718742444E-12 4.633684666116384E-12 1.812802427917217E-7 -4.970691189143166E-11 3.501985638999723E-8 -6.439611481359934E-11
node 8.794668198229739E-15 -2.211285368886325E-14 -4.970691189143166E-11 2.068703711611552E-10 -1.998408120454851E-10 1.367664578494671E-11
peri -4.775360493229176E-13 8.671110581346988E-13 3.501985638999723E-8 -1.998408120454851E-10 6.96843646129337E-9 -2.526215972690497E-11
i -1.760976897656523E-14 5.955914672066328E-14 -6.439611481359934E-11 1.367664578494671E-11 -2.526215972690497E-11 3.55268101946866E-11

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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