+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   266841 (2009 UA27) Classification: Main-belt Asteroid          SPK-ID: 2266841 [ 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 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1019393727404455 7.3436e-08   a 2.76788640582553 2.8431e-08 au q 2.485729801798869 2.0337e-07 au i 2.664283931298073 7.235e-06 deg node 295.4369590911331 0.00015568 deg peri 47.55343935254726 0.0001587 deg M 149.639069465161 3.1634e-05 deg tp 2458301.361338088286 (2018-Jul-01.86133809) 0.00014737 TDB period 1681.979974800736 4.61 2.5915e-05 7.095e-08 d yr n .2140334637709638 3.2977e-09 deg/d Q 3.05004300985219 3.1329e-08 au   Orbit Determination Parameters    # obs. used (total)      161      data-arc span      8925 days (24.44 yr)      first obs. used      1995-08-27      last obs. used      2020-02-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58901      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 12:50:10   Additional Information  Earth MOID = 1.47855 au   Jupiter MOID = 2.30539 au   T_jup = 3.329  [ hide covariance matrix ] Orbital Elements at Epoch 2457174.5 (2015-Jun-01.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1018043329235645 7.3735e-08   q 2.48587991871276 2.0386e-07 au tp 2456610.886407285671 (2013-Nov-14.38640729) 0.00014896 TDB node 295.722300372445 0.00015501 deg peri 45.68898022623895 0.00015806 deg i 2.670830335618504 7.2509e-06 deg   Orbit Determination Parameters    # obs. used (total)      161      data-arc span      8925 days (24.44 yr)      first obs. used      1995-08-27      last obs. used      2020-02-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58901      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 12:50:10   Additional Information  Jupiter MOID = 2.30539 au   T_jup = 3.329  Orbit Covariance (6×6)   e q tp node peri i e 5.436876902331512E-15 -1.491545965429207E-14 6.567912547897287E-13 -8.387905895701302E-15 5.503595740734233E-14 -1.305599370126107E-15 q -1.491545965429207E-14 4.155940380204138E-14 -2.349927932725608E-12 2.347529577336194E-14 -2.164387567113523E-13 4.230274323146252E-15 tp 6.567912547897287E-13 -2.349927932725608E-12 2.21876911864895E-8 9.9381110284236E-12 4.654526127686494E-9 6.770930836387603E-14 node -8.387905895701302E-15 2.347529577336194E-14 9.9381110284236E-12 2.402885900989995E-8 -2.399951879759514E-8 2.609042442657934E-10 peri 5.503595740734233E-14 -2.164387567113523E-13 4.654526127686494E-9 -2.399951879759514E-8 2.498155690410647E-8 -2.605693977270159E-10 i -1.305599370126107E-15 4.230274323146252E-15 6.770930836387603E-14 2.609042442657934E-10 -2.605693977270159E-10 5.257586402429422E-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 16.6   n/a MPO454983   266841 (2009 UA27)          Discovered 2009-Oct-21 by Mt. Lemmon Survey at Mount Lemmon Reference: 20110218/Numbers.arc Last Updated: 2011-02-22 [ show close-approach data ] Alternate Designations  2009 UA27 = 2005 XG36  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 00:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin