+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   22572 Yuanzhang (1998 HJ39) Classification: Main-belt Asteroid          SPK-ID: 2022572 [ 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 .1774364857764391 3.6252e-08   a 2.408365339783947 1.0244e-08 au q 1.981033457426904 9.0883e-08 au i 1.793376737163997 4.0362e-06 deg node 189.3127572555518 0.00011593 deg peri 60.98112258930315 0.00011664 deg M 348.6039571557641 1.6488e-05 deg tp 2459243.714903945114 (2021-Jan-29.21490395) 6.2683e-05 TDB period 1365.155048369253 3.74 8.7098e-06 2.385e-08 d yr n .2637063097192061 1.6825e-09 deg/d Q 2.835697222140991 1.2061e-08 au   Orbit Determination Parameters    # obs. used (total)      1169      data-arc span      10008 days (27.40 yr)      first obs. used      1992-11-26      last obs. used      2020-04-21      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52628      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 04:07:44   Additional Information  Earth MOID = .966134 au   Jupiter MOID = 2.19806 au   T_jup = 3.499  [ 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 15.30   n/a E2021B10   diameter diameter 1.991 km 0.249 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.213   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   22572 Yuanzhang           Discovered 1998 Apr. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Yuan Zhang (b. 1988) is a finalist in the 2006 Intel Science Talent Search (STS), a science competition for high school seniors, for her medicine and health project. She attends the Montgomery Blair High School, Silver Spring, Maryland. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20060314/MPCPages.arc Last Updated: 2006-03-23 [ show close-approach data ] Alternate Designations  1998 HJ39 = 1999 TO146  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-22 04:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin