+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15533 (2000 AP138) Classification: Main-belt Asteroid          SPK-ID: 2015533 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1304735343963487 2.8347e-08   a 2.332838852811414 8.1308e-09 au q 2.028465122507985 6.5226e-08 au i 9.679171140547307 3.4028e-06 deg node 99.0385422544186 2.0896e-05 deg peri 52.32485599971623 2.5687e-05 deg M 170.6671572357145 1.4917e-05 deg tp 2458383.517294861000 (2018-Sep-22.01729486) 5.3255e-05 TDB period 1301.444152745047 3.56 6.804e-06 1.863e-08 d yr n .276615788115592 1.4462e-09 deg/d Q 2.637212583114843 9.1916e-09 au   Orbit Determination Parameters    # obs. used (total)      2040      data-arc span      15200 days (41.62 yr)      first obs. used      1978-12-22      last obs. used      2020-08-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43581      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 01:00:20   Additional Information  Earth MOID = 1.05617 au   Jupiter MOID = 2.40303 au   T_jup = 3.539  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.9   n/a MPO384889   diameter diameter 3.929 km 0.647 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   rotation period rot_per 114. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2008) http://www.asu.cas.cz/~ppravec/neo.htm] geometric albedo albedo 0.344   0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   15533 (2000 AP138)          Discovered 2000-Jan-05 by LINEAR at Socorro Reference: 20000621/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  2000 AP138 = 1978 YE1 = 1994 JC1 = 1997 AE21  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-28 00:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin