+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17765 (1998 EZ2) Classification: Main-belt Asteroid          SPK-ID: 2017765 [ 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 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1676262618968652 2.3902e-08   a 2.517454700774206 1.1249e-08 au q 2.095463179788735 5.9204e-08 au i 6.329972948720982 4.2938e-07 deg node 43.69198919808854 8.706e-06 deg peri 243.1558674120642 1.2115e-05 deg M 137.1088671316833 6.9834e-06 deg tp 2458644.846613643367 (2019-Jun-10.34661364) 2.7094e-05 TDB period 1458.951731373203 3.99 9.7786e-06 2.677e-08 d yr n .2467525088449353 1.6538e-09 deg/d Q 2.939446221759678 1.3134e-08 au   Orbit Determination Parameters    # obs. used (total)      1825      data-arc span      25914 days (70.95 yr)      first obs. used      1950-03-21      last obs. used      2021-03-02      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47491      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:12:18   Additional Information  Earth MOID = 1.08651 au   Jupiter MOID = 2.2358 au   T_jup = 3.430  [ 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 13.8   n/a MPO502304   diameter diameter 4.938 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.166   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17765 (1998 EZ2)          Discovered 1998-Mar-01 by Beijing Schmidt CCD Asteroid Program at Xinglong Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 EZ2 = 1987 MX  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 00:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin