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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1655510805591164 3.5816e-08  
a 2.620980514257512 1.1978e-08 au
q 2.187074357997792 9.3783e-08 au
i 12.24003808352698 5.561e-06 deg
node 290.9542012577555 2.0378e-05 deg
peri 111.7614853521476 2.7343e-05 deg
M 322.2940326866274 1.8023e-05 deg
tp 2459162.831088610998
(2020-Nov-09.33108861)
7.7941e-05 TDB
period 1549.865871740503
4.24
1.0625e-05
2.909e-08
d
yr
n .2322781645586655 1.5923e-09 deg/d
Q 3.054886670517231 1.3961e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1711  
   data-arc span      17027 days (46.62 yr)  
   first obs. used      1973-12-23  
   last obs. used      2020-08-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43263  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:44:09  

Additional Information
 Earth MOID = 1.23074 au 
 Jupiter MOID = 2.39357 au 
 T_jup = 3.353 
[ 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 12.2   n/a MPO344313  
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. 2019-August); 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

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