+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   266754 (2009 SA77) Classification: Outer Main-belt Asteroid          SPK-ID: 2266754 [ 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 .09463432452358361 5.1036e-08   a 3.251464330951406 3.7192e-08 au q 2.943764200279294 1.7786e-07 au i 5.93516736157443 5.294e-06 deg node 89.07131641165986 7.0484e-05 deg peri 347.9470355247041 8.3039e-05 deg M 251.176787030119 4.366e-05 deg tp 2459647.845243684929 (2022-Mar-09.34524368) 0.00026306 TDB period 2141.494276511337 5.86 3.6744e-05 1.006e-07 d yr n .1681069167210049 2.8844e-09 deg/d Q 3.559164461623519 4.0712e-08 au   Orbit Determination Parameters    # obs. used (total)      172      data-arc span      6204 days (16.99 yr)      first obs. used      2003-10-22      last obs. used      2020-10-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54855      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 22:23:40   Additional Information  Earth MOID = 1.95952 au   Jupiter MOID = 1.66728 au   T_jup = 3.166  [ 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 16.16   n/a E2021B55   diameter diameter 3.236 km 0.376 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.061   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   266754 (2009 SA77)          Discovered 2009-Sep-17 by Spacewatch at Kitt Peak Reference: 20110218/Numbers.arc Last Updated: 2011-02-22 [ show close-approach data ] Alternate Designations  2009 SA77 = 2003 UC387  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-27 22:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin