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21888 Durech (1999 UL44)
Classification: Main-belt Asteroid          SPK-ID: 2021888
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03021941341894819 1.3448e-08  
a 3.058779292439555 1.702e-08 au
q 2.966344776444006 4.1095e-08 au
i 9.160044014719849 1.2793e-06 deg
node 351.7093486360737 5.1256e-06 deg
peri 10.26193901317966 5.6531e-05 deg
M 15.18514032859257 5.2146e-05 deg
tp 2459118.079176793247
(2020-Sep-25.57917679)
0.00028329 TDB
period 1953.982361200949
5.35
1.6308e-05
4.465e-08
d
yr
n .1842391247476452 1.5377e-09 deg/d
Q 3.151213808435104 1.7534e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2106  
   data-arc span      9145 days (25.04 yr)  
   first obs. used      1996-01-28  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45509  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:54:42  

Additional Information
 Earth MOID = 1.96077 au 
 Jupiter MOID = 2.00047 au 
 T_jup = 3.214 
[ 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 13.11   n/a E2021B10  

21888 Durech           Discovered 1999 Oct. 29 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Josef Durech (b. 1974), of the Astronomical Institute, Charles University, in Prague, has provided lightcurve inversion models for dozens of minor planets (including detection of the YORP effect), written public-domain software for lightcurve inversion and contributed to amateur-professional collaboration.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080718/MPCPages.arcLast Updated: 2008-07-18
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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