+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   243546 Fengchuanliu (2010 JH61) Classification: Main-belt Asteroid          SPK-ID: 2243546 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .116366055996848 5.8115e-08   a 3.031693624733028 3.6573e-08 au q 2.678907394632057 1.7139e-07 au i 16.23573039100788 6.931e-06 deg node 161.7870911597761 2.4455e-05 deg peri 282.1946838871569 4.0436e-05 deg M 189.7152742320804 3.3352e-05 deg tp 2459912.509970174760 (2022-Nov-29.00997017) 0.00018461 TDB period 1928.085961804845 5.28 3.489e-05 9.552e-08 d yr n .1867136668859985 3.3787e-09 deg/d Q 3.384479854833998 4.0829e-08 au   Orbit Determination Parameters    # obs. used (total)      221      data-arc span      5933 days (16.24 yr)      first obs. used      2003-04-01      last obs. used      2019-06-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .6032      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 09:22:02   Additional Information  Earth MOID = 1.75187 au   Jupiter MOID = 1.89767 au   T_jup = 3.172  [ 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 15.6   n/a MPO391275   diameter diameter 4.415 km 0.274 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.057   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   243546 Fengchuanliu           Discovered 2010 May 8 by WISE. Fengchuan Liu (b. 1965) is an expert in cryogenic physics who served as the project manager for the Wide-field Infrared Survey Explorer and NEOWISE projects and who has worked on a number of other NASA low temperature physics experiments. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2013-11-17 Last Updated: 2014-11-10 [ show close-approach data ] Alternate Designations  2010 JH61 = 2008 CE210  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-25 03:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin