+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   13473 Hokema (1953 GJ) Classification: Main-belt Asteroid          SPK-ID: 2013473 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .170770344443317 3.1201e-08   a 2.253963963346892 7.7671e-09 au q 1.869053760963319 7.1091e-08 au i 4.803357264318248 3.8142e-06 deg node 172.9681669599659 3.7362e-05 deg peri 63.38274633146339 3.8714e-05 deg M 335.2063799121536 1.0905e-05 deg tp 2459285.624842357785 (2021-Mar-12.12484236) 3.7626e-05 TDB period 1236.00116240486 3.38 6.3888e-06 1.749e-08 d yr n .2912618620030713 1.5055e-09 deg/d Q 2.638874165730464 9.0935e-09 au   Orbit Determination Parameters    # obs. used (total)      1753      data-arc span      24773 days (67.82 yr)      first obs. used      1953-04-07      last obs. used      2021-02-02      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52436      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 23:57:49   Additional Information  Earth MOID = .862375 au   Jupiter MOID = 2.36492 au   T_jup = 3.601  [ 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 14.82   n/a E2021B10   diameter diameter 2.529 km 0.541 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.399   0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   13473 Hokema           Discovered 1953 Apr. 7 by K. Reinmuth at Heidelberg. Peter Hokema (b. 1955) is a German violinist and maker of musical instruments. He developed several instruments that can be played without knowledge of scales and notation. His instruments are used successfully in music therapy for handicapped people. The name was suggested by A. Doppler. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20000726/MPCPages.arc Last Updated: 2013-03-29 [ show close-approach data ] Alternate Designations  1953 GJ = 1998 SP141  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 12:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin