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 ]  
118315 (1998 WR12)
Classification: Main-belt Asteroid          SPK-ID: 2118315
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .137218953828137 5.0808e-08  
a 2.288845663170535 1.084e-08 au
q 1.974772655796206 1.1884e-07 au
i 6.030967581836148 4.205e-06 deg
node 254.9999104048298 5.4166e-05 deg
peri 122.93758543334 5.7194e-05 deg
M 107.5950396773997 1.8898e-05 deg
tp 2458622.481599694878
(2019-May-18.98159970)
6.5381e-05 TDB
period 1264.803884248477
3.46
8.9853e-06
2.46e-08
d
yr
n .2846291069179515 2.022e-09 deg/d
Q 2.602918670544864 1.2328e-08 au
  Orbit Determination Parameters
   # obs. used (total)      551  
   data-arc span      7743 days (21.20 yr)  
   first obs. used      1998-11-21  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6108  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:56:56  

Additional Information
 Earth MOID = .984857 au 
 Jupiter MOID = 2.871 au 
 T_jup = 3.580 
[ 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 16.3   n/a MPO453654  

118315 (1998 WR12)          Discovered 1998-Nov-21 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 WR12 = 2001 QP221 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-21 11:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin