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JPL Small-Body Database Browser
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11148 Einhardress (1997 XO8)
Classification: Main-belt Asteroid          SPK-ID: 2011148
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1167453160617196 3.5999e-08  
a 2.446969035432788 1.0394e-08 au
q 2.161296861997946 8.782e-08 au
i 3.879359801420354 3.4178e-06 deg
node 97.42922879358149 6.3414e-05 deg
peri 81.11500659100105 6.606e-05 deg
M 159.6960787722081 2.0508e-05 deg
tp 2457980.298390230400
7.7329e-05 TDB
period 1398.109341404268
n .2574905905702727 1.6406e-09 deg/d
Q 2.73264120886763 1.1607e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1396  
   data-arc span      13911 days (38.09 yr)  
   first obs. used      1981-10-24  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54465  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:32:13  

Additional Information
 Earth MOID = 1.16948 au 
 Jupiter MOID = 2.23383 au 
 T_jup = 3.485 
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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 14.3   n/a MPO416835  
diameter diameter 4.161 km 0.142 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 7.77240 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.134   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

11148 Einhardress           Discovered 1997 Dec. 7 by ODAS at Caussols.
Einhard Ress (b. 1936) was an engineer and scientist at the German Aerospace Center (DLR). He used innovative technology to develop the focal-plane electronics of the ESA Mars Express mission and of an airborne digital camera. The naming is on the occasion of his retirement.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010804/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1997 XO8 = 1981 UZ21 = 1991 JX2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2019-Dec-12 22:14 UT
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