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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1164791405540784 3.5864e-08  
a 2.447635121030255 1.0322e-08 au
q 2.162536685742673 8.7587e-08 au
i 3.879352843745994 3.3508e-06 deg
node 97.42888894985262 6.3247e-05 deg
peri 81.02714404588862 6.5885e-05 deg
M 262.7641778149027 2.0934e-05 deg
tp 2459378.282843586682
(2021-Jun-12.78284359)
8.287e-05 TDB
period 1398.680245972658
3.83
8.8478e-06
2.422e-08
d
yr
n .2573854896689786 1.6282e-09 deg/d
Q 2.732733556317836 1.1525e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1441  
   data-arc span      13974 days (38.26 yr)  
   first obs. used      1981-10-24  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5451  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:57:16  

Additional Information
 Earth MOID = 1.1703 au 
 Jupiter MOID = 2.23243 au 
 T_jup = 3.485 
[ 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 14.3   n/a MPO416835  
diameter diameter 4.161 km 0.142 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.77240 h n/a LCDB (Rev. 2019-August); 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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

[ show close-approach data ]
Alternate Designations
 1997 XO8 = 1981 UZ21 = 1991 JX2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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