+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21544 Hermainkhan (1998 QL33) Classification: Main-belt Asteroid          SPK-ID: 2021544 [ 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 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1029285535572294 2.0226e-08   a 2.529164417032702 1.0084e-08 au q 2.268841181879113 5.3783e-08 au i 11.33687640773781 6.1871e-07 deg node 316.442333701832 6.23e-06 deg peri 292.4572793177547 1.0314e-05 deg M 273.4098812177072 1.351e-05 deg tp 2459553.870146136185 (2021-Dec-05.37014614) 5.592e-05 TDB period 1469.142835210442 4.02 8.7864e-06 2.406e-08 d yr n .2450408437981683 1.4655e-09 deg/d Q 2.789487652186291 1.1122e-08 au   Orbit Determination Parameters    # obs. used (total)      1983      data-arc span      12572 days (34.42 yr)      first obs. used      1986-10-04      last obs. used      2021-03-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49537      source      ORB      producer      Otto Matic      solution date      2021-Mar-17 03:00:02   Additional Information  Earth MOID = 1.28041 au   Jupiter MOID = 2.3661 au   T_jup = 3.417  [ 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 13.94   n/a E2021B10   diameter diameter 4.512 km 0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.239   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21544 Hermainkhan           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Hermain Suhail Khan (b. 1989) was awarded first place in the 2006 Intel International Science and Engineering Fair for his earth science team project. He attends the Francis Lewis High School, Fresh Meadows, New York, 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: 20060711/MPCPages.arc Last Updated: 2006-07-17 [ show close-approach data ] Alternate Designations  1998 QL33 = 1986 TH4 = 1994 PF32  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-13 06:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin