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 ]  
189458 (1999 RO31)
Classification: Main-belt Asteroid          SPK-ID: 2189458
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .175910792074788 6.599e-08  
a 2.769556420527471 2.388e-08 au
q 2.282361556896669 1.764e-07 au
i 6.057310457749053 5.3037e-06 deg
node 121.9203093108744 5.0669e-05 deg
peri 240.1517270188671 5.2484e-05 deg
M 166.4708920836738 1.6398e-05 deg
tp 2458222.016238011890
(2018-Apr-13.51623801)
7.1716e-05 TDB
period 1683.502447832468
4.61
2.1774e-05
5.961e-08
d
yr
n .2138399029140141 2.7657e-09 deg/d
Q 3.256751284158273 2.8081e-08 au
  Orbit Determination Parameters
   # obs. used (total)      332  
   data-arc span      9836 days (26.93 yr)  
   first obs. used      1993-04-19  
   last obs. used      2020-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53339  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 07:28:27  

Additional Information
 Earth MOID = 1.28656 au 
 Jupiter MOID = 2.2119 au 
 T_jup = 3.307 
[ 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 16.0   n/a MPO454307  

189458 (1999 RO31)          Discovered 1999-Sep-04 by Sarounova, L. at Ondrejov
Reference: 20080819/Numbers.arcLast Updated: 2008-08-25
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-30 00:29 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin