+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15270 (1991 AE2) Classification: Main-belt Asteroid          SPK-ID: 2015270 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1468151438939836 9.4113e-09   a 2.564682928360005 1.0593e-08 au q 2.188148635190387 2.2265e-08 au i 14.10813837814801 1.2609e-06 deg node 150.0460018666143 2.7655e-06 deg peri 267.4154383428834 1.2712e-05 deg M 120.8203264893836 1.177e-05 deg tp 2458697.015097282022 (2019-Aug-01.51509728) 4.8371e-05 TDB period 1500.199264851341 4.11 9.2942e-06 2.545e-08 d yr n .2399681218585809 1.4867e-09 deg/d Q 2.941217221529622 1.2148e-08 au   Orbit Determination Parameters    # obs. used (total)      2070      data-arc span      24546 days (67.20 yr)      first obs. used      1953-12-31      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48632      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:53:40   Additional Information  Earth MOID = 1.25198 au   Jupiter MOID = 2.47109 au   T_jup = 3.376  [ 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 13.63   n/a E2021B10   diameter diameter 4.559 km 0.206 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.371   0.096 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15270 (1991 AE2)          Discovered 1991-Jan-07 by McNaught, R. H. at Siding Spring Reference: 20000621/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1991 AE2 = 2000 CM93  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 09:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin