+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21464 Chinaroonchai (1998 HH88) Classification: Main-belt Asteroid          SPK-ID: 2021464 [ 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 .2013347837492241 3.7712e-08   a 2.28478030527021 7.0479e-09 au q 1.824774556594146 8.5074e-08 au i 5.725462752743177 4.1839e-06 deg node 225.5854897616663 4.0973e-05 deg peri 49.41052507304813 4.2172e-05 deg M 160.510393325394 1.1693e-05 deg tp 2458638.073526455555 (2019-Jun-03.57352646) 4.0019e-05 TDB period 1261.435638410883 3.45 5.8368e-06 1.598e-08 d yr n .2853891146230154 1.3205e-09 deg/d Q 2.744786053946275 8.4669e-09 au   Orbit Determination Parameters    # obs. used (total)      1296      data-arc span      15387 days (42.13 yr)      first obs. used      1978-11-28      last obs. used      2021-01-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52047      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:52:46   Additional Information  Earth MOID = .813039 au   Jupiter MOID = 2.37614 au   T_jup = 3.569  [ 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 14.92   n/a E2020-QM5   21464 Chinaroonchai           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Tanongsak Chinaroonchai (b. 1987) was awarded second place in the 2006 Intel International Science and Engineering Fair for his botany team project. He attends the Triam Udom Suksa School, Bangkok, Thailand. 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 HH88 = 1978 WV20  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-11 05:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin