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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1162890199805067 3.1672e-08  
a 2.447670173024392 7.5222e-09 au
q 2.163033007367869 8.0241e-08 au
i 3.879118948908905 2.9749e-06 deg
node 97.42677362023778 4.976e-05 deg
peri 80.94210280795575 5.1519e-05 deg
M 4.746493743981236 1.3358e-05 deg
tp 2459378.058417646059
(2021-Jun-12.55841765)
5.1877e-05 TDB
period 1398.710291325548
3.83
6.4478e-06
1.765e-08
d
yr
n .2573799608343701 1.1865e-09 deg/d
Q 2.732307338680916 8.3969e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1895  
   data-arc span      14494 days (39.68 yr)  
   first obs. used      1981-10-24  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50463  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 02:36:41  

Additional Information
 Earth MOID = 1.17161 au 
 Jupiter MOID = 2.23103 au 
 T_jup = 3.485 
[ 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 14.36   n/a MPO614063  
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. 2020-October); 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

Alternate Designations
 1997 XO8 = 1981 UZ21 = 1991 JX2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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