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2005 Hencke (1973 RA)
Classification: Main-belt Asteroid          SPK-ID: 2002005
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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1657942599228483 1.7323e-08  
a 2.621697578329617 7.7354e-09 au
q 2.187035168588935 4.4938e-08 au
i 12.2395384674858 8.2465e-07 deg
node 290.9556450848054 2.9858e-06 deg
peri 111.8168498173968 7.3903e-06 deg
M 54.21252992222192 4.9905e-06 deg
tp 2459163.009352068857
(2020-Nov-09.50935207)
2.1683e-05 TDB
period 1550.501948088503
4.25
6.8622e-06
1.879e-08
d
yr
n .2321828749998134 1.0276e-09 deg/d
Q 3.0563599880703 9.0179e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2592  
   data-arc span      17296 days (47.35 yr)  
   first obs. used      1973-12-23  
   last obs. used      2021-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38137  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 13:02:15  

Additional Information
 Earth MOID = 1.2302 au 
 Jupiter MOID = 2.39336 au 
 T_jup = 3.353 
[ 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 12.32   n/a MPCxxxxx  
diameter diameter 9.369 km 0.174 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.186 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Brinsfield, J.W. (2008) Minor Planet Bull. 35, 86-87.]
geometric albedo albedo 0.265   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2005 Hencke (1973 RA)          Discovered 1973-Sep-02 by Wild, P. at Zimmerwald
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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