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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
305231 (2007 XR18)
Classification: Main-belt Asteroid          SPK-ID: 2305231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ 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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1163121111120457 9.1776e-08  
a 2.710549012244585 3.8471e-08 au
q 2.395279334357747 2.6577e-07 au
i 12.19877072659378 1.042e-05 deg
node 270.1389207494767 4.2978e-05 deg
peri 88.81106244061247 6.5448e-05 deg
M 264.9554275787805 5.0211e-05 deg
tp 2459030.837452175843
(2020-Jun-30.33745218)
0.00023224 TDB
period 1629.987687216067
4.46
3.4702e-05
9.501e-08
d
yr
n .2208605640542359 4.7021e-09 deg/d
Q 3.025818690131423 4.2946e-08 au
  Orbit Determination Parameters
   # obs. used (total)      178  
   data-arc span      5671 days (15.53 yr)  
   first obs. used      2002-10-06  
   last obs. used      2018-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55598  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 10:02:38  

Additional Information
 Earth MOID = 1.42879 au 
 Jupiter MOID = 2.4434 au 
 T_jup = 3.321 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0   n/a MPO433966  

305231 (2007 XR18)          Discovered 2007-Dec-13 by OAM at Costitx
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-10 06:20 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin