+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18458 Caesar (1995 EY8) Classification: Main-belt Asteroid          SPK-ID: 2018458 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1387123291983285 3.3925e-08   a 2.299511107358949 7.2353e-09 au q 1.980540565639762 7.6701e-08 au i 5.874075114093478 3.9277e-06 deg node 353.6977835411478 2.9864e-05 deg peri 220.5859508664153 3.2521e-05 deg M 108.2025969296513 1.2277e-05 deg tp 2458817.686823483942 (2019-Nov-30.18682348) 4.3275e-05 TDB period 1273.654676101544 3.49 6.0113e-06 1.646e-08 d yr n .2826511822670044 1.334e-09 deg/d Q 2.618481649078137 8.239e-09 au   Orbit Determination Parameters    # obs. used (total)      1622      data-arc span      11926 days (32.65 yr)      first obs. used      1988-03-22      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51142      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 03:08:06   Additional Information  Earth MOID = .978011 au   Jupiter MOID = 2.36097 au   T_jup = 3.573  [ 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 15.02   n/a E2021B10   diameter diameter 2.425 km 0.608 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.300   0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18458 Caesar           Discovered 1995 Mar. 5 by F. Börngen at Tautenburg. Emperor Gaius Julius Caesar (100-44 B.C.) promulgated in 46 B.C. on the advice of the Alexandrine astronomer Sosigenes what is now called the Julian calendar. In 44 B.C., after the assassination of Julius, the fifth month "Quintilis" was renamed Julius (July). NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020526/MPCPages.arc Last Updated: 2003-10-02 Alternate Designations  1995 EY8 = 1993 TF7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-07 00:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin