Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
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 ]  
439858 (1999 ON4)
Classification: TransNeptunian Object          SPK-ID: 2439858
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04868427263695277 0.00027184  
a 43.00114216909999 0.015918 au
q 40.90766284003916 0.0034592 au
i 3.181289038677999 0.00023851 deg
node 132.9946849003236 0.0010969 deg
peri 190.0020393917014 0.064348 deg
M 20.84781937184217 0.066953 deg
tp 2453431.965589026133
(2005-Mar-02.46558903)
16.673 TDB
period 102995.5387492815
281.99
57.19
0.1566
d
yr
n .003495297023265596 1.9408e-06 deg/d
Q 45.09462149816081 0.016693 au
  Orbit Determination Parameters
   # obs. used (total)      43  
   data-arc span      5792 days (15.86 yr)  
   first obs. used      1999-07-19  
   last obs. used      2015-05-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .27522  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 14:35:13  

Additional Information
 Earth MOID = 39.8948 au 
 Jupiter MOID = 35.8574 au 
 T_jup = 5.855 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.6   n/a MPO224580  

439858 (1999 ON4)          Discovered 1999-Jul-19 by Mauna Kea at Mauna Kea
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Aug-05 08:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin