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 ]  
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1153964855180814 5.7129e-08  
a 2.70807862054982 2.265e-08 au
q 2.395575865231717 1.4511e-07 au
i 12.20075982770327 3.9617e-06 deg
node 270.1349721461154 2.7644e-05 deg
peri 89.08635662674824 4.6635e-05 deg
M 353.0304542329641 3.0235e-05 deg
tp 2459032.013185309628
(2020-Jul-01.51318531)
0.00013656 TDB
period 1627.759841268789
4.46
2.0421e-05
5.591e-08
d
yr
n .2211628465532059 2.7746e-09 deg/d
Q 3.020581375867923 2.5264e-08 au
  Orbit Determination Parameters
   # obs. used (total)      359  
   data-arc span      6613 days (18.11 yr)  
   first obs. used      2002-10-06  
   last obs. used      2020-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47476  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 06:08:49  

Additional Information
 Earth MOID = 1.43005 au 
 Jupiter MOID = 2.44949 au 
 T_jup = 3.322 
[ 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1939-May-19 07:18 00:27 Iris 0.046421501099224 0.0463742606886673 0.0464687436814333 2.84215521513964 2.84215517156778 2429402.803953018 27.304218855681 2405.3054309083 103.134353356025 -11.9875829043654 14251.6531259384 T 10 CATAB v2.0f-lin.ifort 2020-Dec-18 06:08:50 2020-Dec-18 06:08
2146-Jun-21 23:43 00:04 Europ 0.039182966907033 0.0391500922284436 0.0392161108837149 6.52929858879244 6.52929854724848 2505042.488136603 3.49700647998871 5388.21428904968 100.845146913865 72.2477194566462 55343.7598888929 T 10 CATAB v2.0f-lin.ifort 2020-Dec-18 06:08:50 2020-Dec-18 06:08
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-27 02:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin