+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2675 Tolkien (1982 GB) Classification: Main-belt Asteroid          SPK-ID: 2002675 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 44 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1012642016659553 3.7433e-08   a 2.21278423454764 5.7741e-09 au q 1.988708405577161 8.343e-08 au i 2.751406058870492 4.1639e-06 deg node 5.841700501900116 6.8465e-05 deg peri 2.068235594825269 7.0489e-05 deg M 35.87418328725762 1.7558e-05 deg tp 2458880.691797722552 (2020-Feb-01.19179772) 5.8502e-05 TDB period 1202.283895204421 3.29 4.7059e-06 1.288e-08 d yr n .2994301108381646 1.172e-09 deg/d Q 2.436860063518118 6.3588e-09 au   Orbit Determination Parameters    # obs. used (total)      2914      data-arc span      30379 days (83.17 yr)      first obs. used      1937-09-14      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42709      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:07:41   Additional Information  Earth MOID = .987349 au   Jupiter MOID = 2.96499 au   T_jup = 3.648  [ 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 12.2   n/a MPO347541   diameter diameter 10.960 km 0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 1060. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Durkee, R.I.; Brinsfield, J.W.; Hornoch, K.; Kusnirak, P. (2011) Minor Planet Bull. 38, 182-183.] geometric albedo albedo 0.213   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 2675 Tolkien (1982 GB)          Discovered 1982-Apr-14 by Watt, M. at Flagstaff (AM) Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory. Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1980-Apr-07 21:10 < 00:01 Hebe 0.0274307210019988 0.0274303531985848 0.0274310888263939 6.62385420746174 6.62385417324729 2444337.381771765 0.219154338099212 103.790053515954 17.0341315055474 -86.1976672549172 240326.813357533 T 44 CATAB v2.0f-lin.ifort 2020-Dec-18 02:07:48 2020-Dec-18 02:07 Alternate Designations  1982 GB = 1934 VO = 1937 RH = 1939 FR = 1949 FO = 1950 QA1 = 1952 DX = 1969 JE = 1969 KB = 1970 RB = 1973 QX = 1975 BV  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 15:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin