+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18779 Hattyhong (1999 JN44) Classification: Main-belt Asteroid          SPK-ID: 2018779 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06133628067575027 1.9933e-08   a 2.322268844358077 6.7221e-09 au q 2.17982951071598 4.691e-08 au i 7.308611480474603 3.0211e-07 deg node 37.52976889319904 3.9358e-06 deg peri 103.9302187433591 9.3135e-06 deg M 121.2439868973726 6.7118e-06 deg tp 2458765.163703195730 (2019-Oct-08.66370320) 2.4253e-05 TDB period 1292.608985072341 3.54 5.6125e-06 1.537e-08 d yr n .2785064966725824 1.2093e-09 deg/d Q 2.464708178000174 7.1344e-09 au   Orbit Determination Parameters    # obs. used (total)      1927      data-arc span      9775 days (26.76 yr)      first obs. used      1993-10-15      last obs. used      2020-07-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49544      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:37:50   Additional Information  Earth MOID = 1.20479 au   Jupiter MOID = 2.53551 au   T_jup = 3.563  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.36   n/a E2021B10   diameter diameter 3.500 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.173   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18779 Hattyhong           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Hatty Hong (b. 1985) was awarded third place in the 2003 Intel International Science and Engineering Fair for her engineering team project. She attends the Wheatley School, Old Westbury, 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: 20040830/MPCPages.arc Last Updated: 2004-09-06 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-19 18:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin