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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8995065202422711 3.2895e-06  
a 23.90327241576069 0.00079623 au
q 2.402123022656728 1.6154e-06 au
i 160.4282722118854 2.2524e-05 deg
node 297.7736484872718 7.8259e-05 deg
peri 103.1272190598914 0.00012502 deg
M 59.87338327311625 0.0029896 deg
tp 2451501.196104435709
(1999-Nov-18.69610444)
0.00038515 TDB
period 42685.9025277548
116.87
2.1328
0.005839
d
yr
n .00843369774753912 4.2139e-07 deg/d
Q 45.40442180886466 0.0015124 au
  Orbit Determination Parameters
   # obs. used (total)      278  
   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-N16  
   condition code      2  
   norm. resid. RMS      .48539  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-05 23:54:44  

Additional Information
 Earth MOID = 1.4926 au 
 Jupiter MOID = .190708 au 
 T_jup = -1.547 
[ 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   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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