+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21349 Bevoke (1997 ER31) Classification: Main-belt Asteroid          SPK-ID: 2021349 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1734508179855583 3.5228e-08   a 3.19744699212163 2.0504e-08 au q 2.64284719587267 1.1802e-07 au i .9329548004773599 4.6191e-06 deg node 23.47921483566164 0.0002398 deg peri 273.0109445523498 0.00024019 deg M 309.9296562749511 1.5423e-05 deg tp 2459490.956787021626 (2021-Oct-03.45678702) 9.0899e-05 TDB period 2088.350819039304 5.72 2.0088e-05 5.5e-08 d yr n .1723848295592449 1.6582e-09 deg/d Q 3.752046788370589 2.4061e-08 au   Orbit Determination Parameters    # obs. used (total)      1353      data-arc span      9779 days (26.77 yr)      first obs. used      1993-09-15      last obs. used      2020-06-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53958      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 01:57:31   Additional Information  Earth MOID = 1.62518 au   Jupiter MOID = 1.46248 au   T_jup = 3.171  [ 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 13.97   n/a E2021B10   diameter diameter 6.664 km 0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.083   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21349 Bevoke           Discovered 1997 Mar. 10 by Spacewatch at Kitt Peak. John Beverly "Bev" Oke (1928-2004) did his PhD at Princeton University and had an outstanding career in spectroscopy and instrument design for large telescopes. Name suggested by R. and P. Jedicke. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2016-06-20 Last Updated: 2016-08-22 [ show close-approach data ] Alternate Designations  1997 ER31 = 1993 RV18 = 1999 RB38  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-13 06:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin