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8807 Schenk (1981 UD23)
Classification: Main-belt Asteroid          SPK-ID: 2008807
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08349284028356523 3.4445e-08  
a 2.358441036974465 7.7853e-09 au
q 2.16152809615615 8.1174e-08 au
i 3.321805909328763 3.1408e-06 deg
node 77.21834670675888 6.7075e-05 deg
peri 299.6878368037969 6.982e-05 deg
M 147.7131067185448 1.9257e-05 deg
tp 2458057.684184300816
7.0781e-05 TDB
period 1322.92724723508
n .2721238078302495 1.3474e-09 deg/d
Q 2.55535397779278 8.4353e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2258  
   data-arc span      13712 days (37.54 yr)  
   first obs. used      1981-10-24  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43849  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:37:30  

Additional Information
 Earth MOID = 1.16449 au 
 Jupiter MOID = 2.79495 au 
 T_jup = 3.546 
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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 14.0   n/a MPO384835  
diameter diameter 4.733 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 307.588 h n/a LCDB (Rev. 2019-January); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.238   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

8807 Schenk           Discovered 1981 Oct. 24 by S. J. Bus at Palomar.
Paul M. Schenk (b. 1958) is a planetary geologist at the Lunar and Planetary Institute, Houston, specializing in topography of asteroid and satellite surfaces as a tool toward geophysical understanding. Contributions include an analysis of the age and formation of Vesta's Rheasilvia basin.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-07-12Last Updated: 2014-08-13

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Alternate Designations
 1981 UD23 = 1981 WU2 = 1995 QV 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2019-Oct-17 14:27 UT
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