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 ]  
379376 (2009 WR261)
Classification: Main-belt Asteroid          SPK-ID: 2379376
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05841780698940073 6.9469e-08  
a 2.773182586673212 5.3007e-08 au
q 2.61117934157857 2.0833e-07 au
i 7.666204129577033 6.8561e-06 deg
node 290.6948549217461 6.2505e-05 deg
peri 143.9010402714553 9.131e-05 deg
M 11.70587592909768 6.6758e-05 deg
tp 2458545.651148319460
(2019-Mar-03.15114832)
0.00031239 TDB
period 1686.809831625839
4.62
4.8363e-05
1.324e-07
d
yr
n .2134206199480189 6.119e-09 deg/d
Q 2.935185831767856 5.6103e-08 au
  Orbit Determination Parameters
   # obs. used (total)      144  
   data-arc span      4702 days (12.87 yr)  
   first obs. used      2006-01-30  
   last obs. used      2018-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56255  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 13:17:39  

Additional Information
 Earth MOID = 1.63097 au 
 Jupiter MOID = 2.23271 au 
 T_jup = 3.321 
[ 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 MPO418929  
rotation period rot_per 4.12 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

379376 (2009 WR261)          Discovered 2009-Nov-16 by LINEAR at Socorro
Reference: Last Updated: 2013-11-20
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-12 06:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin