+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   266520 (2008 ET152) Classification: Main-belt Asteroid          SPK-ID: 2266520 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1427335122926295 1.1145e-07   a 2.259319204558032 2.0531e-08 au q 1.936838639101274 2.5157e-07 au i 3.135017480615645 8.3304e-06 deg node 79.35073207407734 0.00017396 deg peri 343.7267917470753 0.00017686 deg M 19.58751901286768 3.2256e-05 deg tp 2459133.009639490865 (2020-Oct-10.50963949) 0.00011084 TDB period 1240.408740245628 3.40 1.6908e-05 4.629e-08 d yr n .2902269133710814 3.9561e-09 deg/d Q 2.581799770014789 2.3462e-08 au   Orbit Determination Parameters    # obs. used (total)      123      data-arc span      9862 days (27.00 yr)      first obs. used      1994-01-08      last obs. used      2021-01-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .59171      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 03:16:12   Additional Information  Earth MOID = .949645 au   Jupiter MOID = 2.70478 au   T_jup = 3.606  [ hide covariance matrix ] Orbital Elements at Epoch 2456596.5 (2013-Oct-31.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1428102077193587 1.1217e-07   q 1.936509346372842 2.5323e-07 au tp 2456650.913576507690 (2013-Dec-24.41357651) 0.00010414 TDB node 79.38012868920535 0.00017386 deg peri 343.4221608395718 0.00017674 deg i 3.136461407514822 8.3365e-06 deg   Orbit Determination Parameters    # obs. used (total)      123      data-arc span      9862 days (27.00 yr)      first obs. used      1994-01-08      last obs. used      2021-01-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .59171      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 03:16:12   Additional Information  Jupiter MOID = 2.70478 au   T_jup = 3.606  Orbit Covariance (6×6)   e q tp node peri i e 1.258113661638833E-14 -2.833479821755462E-14 -3.839148202348536E-12 9.627347753832439E-14 -1.916951479767396E-12 2.110501176644567E-15 q -2.833479821755462E-14 6.412562786612093E-14 8.714321715478107E-12 -2.209283862493082E-13 4.329039825573391E-12 -4.365110040755078E-15 tp -3.839148202348536E-12 8.714321715478107E-12 1.084539092881724E-8 6.530123980028333E-11 3.323084580667008E-9 -8.7043607258045E-12 node 9.627347753832439E-14 -2.209283862493082E-13 6.530123980028333E-11 3.022595663217436E-8 -3.016551018182142E-8 -4.096763778592471E-10 peri -1.916951479767396E-12 4.329039825573391E-12 3.323084580667008E-9 -3.016551018182142E-8 3.123628241699921E-8 4.064819069812855E-10 i 2.110501176644567E-15 -4.365110040755078E-15 -8.7043607258045E-12 -4.096763778592471E-10 4.064819069812855E-10 6.949751065590704E-11 [ 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 17.9   n/a MPO437227   266520 (2008 ET152)          Discovered 2008-Mar-11 by Spacewatch at Kitt Peak Reference: 20110218/Numbers.arc Last Updated: 2011-02-22 [ show close-approach data ] Alternate Designations  2008 ET152 = 2005 JW184  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-22 15:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin