+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   13166 (1995 WU1) Classification: Main-belt Asteroid          SPK-ID: 2013166 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06081442204015842 5.0018e-08   a 2.424882987617606 2.054e-08 AU q 2.277415130210629 1.1901e-07 AU i 11.70296266282348 8.748e-06 deg node 43.9138044383665 2.8664e-05 deg peri 70.07798584021339 9.3025e-05 deg M 171.7975587922577 8.6015e-05 deg tp 2455742.313311970893 (2011-Jun-29.81331197) 0.00032926 JED period 1379.223368226096 3.78 1.7524e-05 4.798e-08 d yr n .2610164591853009 3.3164e-09 deg/d Q 2.572350845024584 2.1789e-08 AU   Orbit Determination Parameters    # obs. used (total)      1107      data-arc span      13308 days (36.44 yr)      first obs. used      1976-10-30      last obs. used      2013-04-07      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .51847      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:51:28   Additional Information  Earth MOID = 1.32197 AU   T_jup = 3.480  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.3 mag n/a PDS3 (MPC 37531)   rotation period rot_per 3.8123 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2008) http://www.asu.cas.cz/~ppravec/neo.htm] [Pravec, P.; Wolf, M.; Sarounova, L. (2010) http://www.asu.cas.cz/~ppravec/neo.htm] 13166 (1995 WU1)          Discovered 1995-Nov-16 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 20000124/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1995 WU1 = 1976 UT4 = 1997 HD17  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 06:39 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin