+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1983 Bok (1975 LB) Classification: Main-belt Asteroid          SPK-ID: 2001983 [ 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 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09929447690162466 3.1958e-08   a 2.621227640963789 7.8714e-09 au q 2.36095421351421 8.2261e-08 au i 9.413112480133424 6.678e-07 deg node 23.53690631992213 3.9573e-06 deg peri 346.7543956479005 7.2303e-06 deg M 178.990499318397 5.7599e-06 deg tp 2458429.804161205346 (2018-Nov-07.30416121) 2.3069e-05 TDB period 1550.085077267331 4.24 6.9822e-06 1.912e-08 d yr n .2322453169052176 1.0461e-09 deg/d Q 2.881501068413368 8.653e-09 au   Orbit Determination Parameters    # obs. used (total)      2713      data-arc span      25752 days (70.51 yr)      first obs. used      1950-09-13      last obs. used      2021-03-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4529      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 13:12:00   Additional Information  Earth MOID = 1.36075 au   Jupiter MOID = 2.58304 au   T_jup = 3.379  [ 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 13.21   n/a E2021B10   diameter diameter 15.701 km 0.240 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 10.70 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Casalnuovo, G.B. (2015) Minor Planet Bull. 42, 139-141.] geometric albedo albedo 0.034   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   1983 Bok (1975 LB)          Discovered 1975-Jun-09 by Roemer, E. at Tucson Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1975 LB = 1950 RV = 1963 UJ  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 08:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin