+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120621 (1996 AS13) Classification: Main-belt Asteroid          SPK-ID: 2120621 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2087652630700382 3.8625e-08   a 3.108999897242307 2.0091e-08 au q 2.459948715809795 1.2e-07 au i 10.45863922867573 4.5355e-06 deg node 116.4122447837309 2.3845e-05 deg peri 289.0561251247517 2.6355e-05 deg M 239.7028788445996 1.3558e-05 deg tp 2459669.586430112536 (2022-Mar-31.08643011) 8.0463e-05 TDB period 2002.301572365595 5.48 1.9409e-05 5.314e-08 d yr n .1797930965886833 1.7428e-09 deg/d Q 3.758051078674819 2.4286e-08 au   Orbit Determination Parameters    # obs. used (total)      538      data-arc span      8516 days (23.32 yr)      first obs. used      1996-01-15      last obs. used      2019-05-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52744      source      ORB      producer      Otto Matic      solution date      2019-May-30 06:58:06   Additional Information  Earth MOID = 1.49404 au   Jupiter MOID = 1.74658 au   T_jup = 3.160  [ 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 15.2   n/a MPO436582   diameter diameter 3.508 km 0.831 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.143   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   120621 (1996 AS13)          Discovered 1996-Jan-15 by Spacewatch at Kitt Peak Reference: 20060314/Numbers.arc Last Updated: 2006-03-23 [ show close-approach data ] Alternate Designations  1996 AS13 = 2000 YE88  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-29 10:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin