+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21541 Friskop (1998 QP16) Classification: Main-belt Asteroid          SPK-ID: 2021541 [ 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 .04270738233995015 3.0191e-08   a 2.964229746241932 1.7369e-08 au q 2.837635253125725 8.6057e-08 au i 9.520778812727228 5.35e-06 deg node 169.7225938951168 2.5762e-05 deg peri 123.0567024687604 7.9022e-05 deg M 168.4167630855487 7.607e-05 deg tp 2458328.434643954474 (2018-Jul-28.93464395) 0.00039189 TDB period 1864.087175318285 5.10 1.6384e-05 4.486e-08 d yr n .1931240152105716 1.6974e-09 deg/d Q 3.09082423935814 1.8111e-08 au   Orbit Determination Parameters    # obs. used (total)      1245      data-arc span      18201 days (49.83 yr)      first obs. used      1971-03-24      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54964      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:53:08   Additional Information  Earth MOID = 1.83364 au   Jupiter MOID = 2.01441 au   T_jup = 3.243  [ 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 14.0   n/a MPO412344   diameter diameter 5.717 km 0.546 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.163   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21541 Friskop           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Andrew John Friskop (b. 1987) was awarded first place and Best in Category in the 2005 Intel International Science and Engineering Fair for his botany project. He attends the Hankinson High School, Hankinson, North Dakota, U.S.A. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20050822/MPCPages.arc Last Updated: 2005-08-26 [ show close-approach data ] Alternate Designations  1998 QP16 = 4243 T-1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-10 13:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin