+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   150110 (1981 EA30) Classification: Main-belt Asteroid          SPK-ID: 2150110 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2453903897917364 4.9629e-08   a 3.133011824355742 2.1807e-08 au q 2.364200831554967 1.492e-07 au i 16.0211867280061 4.6958e-06 deg node 171.9133245064888 2.262e-05 deg peri 8.436502996861075 2.612e-05 deg M 86.14146171921118 1.3545e-05 deg tp 2458715.824335946057 (2019-Aug-20.32433595) 7.3498e-05 TDB period 2025.543049503494 5.55 2.1148e-05 5.79e-08 d yr n .177730115431634 1.8556e-09 deg/d Q 3.901822817156517 2.7159e-08 au   Orbit Determination Parameters    # obs. used (total)      360      data-arc span      14425 days (39.49 yr)      first obs. used      1981-02-09      last obs. used      2020-08-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .61964      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:17:09   Additional Information  Earth MOID = 1.36887 au   Jupiter MOID = 1.06025 au   T_jup = 3.107  [ 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 15.53   n/a E2021B55   diameter diameter 6.356 km 1.773 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.021   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   150110 (1981 EA30)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring Reference: 20070303/Numbers.arc Last Updated: 2007-03-07 [ show close-approach data ] Alternate Designations  1981 EA30 = 2003 EV56  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-15 00:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin