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20461 Dioretsa (1999 LD31)
Classification: Centaur          SPK-ID: 2020461
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .899069861788965 4.2423e-06  
a 23.8079445812055 0.0010144 au
q 2.402939137101734 1.6274e-06 au
i 160.4083141637491 2.3004e-05 deg
node 297.3049785591672 7.8393e-05 deg
peri 102.6088829020095 0.00013944 deg
M 50.15544580817788 0.0032054 deg
tp 2451489.011139876896
(1999-Nov-06.51113988)
0.00037477 JED
period 42430.80597435989
116.17
2.7118
0.007425
d
yr
n .00848440164482242 5.4225e-07 deg/d
Q 45.21295002530928 0.0019264 au
  Orbit Determination Parameters
   # obs. used (total)      277  
   data-arc span      927 days (2.54 yr)  
   first obs. used      1998-06-16  
   last obs. used      2000-12-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      2  
   fit RMS      .5327  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:43:05  

Additional Information
 Earth MOID = 1.49351 au 
 Jupiter MOID = .174163 au 
 T_jup = -1.546 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a PDS3 (MPO 7841)  

20461 Dioretsa           Discovered 1999 June 8 by the Lincoln Laboratory Near Earth Asteroid Research Team at Socorro.
As befits the first numbered asteroid in a retrograde orbit, Dioretsa is the word asteroid spelled backwards. The name was suggested independently by K. Kitterman and S. Cooksey of Flagstaff, Arizona.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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