Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8989613980722991 4.2485e-06  
a 23.82831472425719 0.0010164 au
q 2.407579606032195 1.6966e-06 au
i 160.4119334106721 2.2889e-05 deg
node 297.3755228781304 7.8298e-05 deg
peri 102.7109897471212 0.00013923 deg
M 51.78173823357643 0.0033129 deg
tp 2451489.496358929462
(1999-Nov-06.99635893)
0.00038038 JED
period 42485.27349278688
116.32
2.7184
0.007443
d
yr
n .008473524362768207 5.4216e-07 deg/d
Q 45.24904984248217 0.0019301 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 = 1.49754 au 
 Jupiter MOID = .180131 au 
 T_jup = -1.548 
[ 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Apr-29 17:49 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin