+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15891 Alissazhang (1997 GG7) Classification: Main-belt Asteroid          SPK-ID: 2015891 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2002891723452073 5.1492e-08   a 2.317207831647397 6.5076e-09 au q 1.853096192894908 1.2012e-07 au i 4.376072591440867 4.695e-06 deg node 181.22867912 3.9108e-05 deg peri 169.779244819548 3.9971e-05 deg M 139.1331506958115 8.1534e-06 deg tp 2458702.563425276653 (2019-Aug-07.06342528) 2.9403e-05 TDB period 1288.385737000359 3.53 5.4274e-06 1.486e-08 d yr n .2794194235944882 1.1771e-09 deg/d Q 2.781319470399887 7.811e-09 au   Orbit Determination Parameters    # obs. used (total)      1468      data-arc span      10695 days (29.28 yr)      first obs. used      1991-12-03      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5404      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:12:05   Additional Information  Earth MOID = .845859 au   Jupiter MOID = 2.65507 au   T_jup = 3.549  [ 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 15.05   n/a E2021B10   15891 Alissazhang           Discovered 1997 Apr. 2 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Alissa Yuan Zhang (b. 1994) is a finalist in the 2012 Intel Science Talent Search, a science competition for high-school seniors, for her chemistry project. She attends the Saratoga High School, Saratoga, California. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20120506/MPCPages.arc Last Updated: 2012-05-09 Alternate Designations  1997 GG7 = 1998 WL11  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-16 02:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin