+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2004303678318202 5.1307e-08   a 2.316967293182616 6.4418e-09 au q 1.852576686355727 1.1961e-07 au i 4.376708865907159 4.6445e-06 deg node 181.2255380194954 3.8183e-05 deg peri 169.7983712778361 3.8993e-05 deg M 193.876554753361 7.9389e-06 deg tp 2459990.938199889520 (2023-Feb-15.43819989) 2.8488e-05 TDB period 1288.18513029579 3.53 5.3723e-06 1.471e-08 d yr n .2794629370681663 1.1655e-09 deg/d Q 2.781357900009505 7.7329e-09 au   Orbit Determination Parameters    # obs. used (total)      1512      data-arc span      10784 days (29.52 yr)      first obs. used      1991-12-03      last obs. used      2021-06-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53966      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 17:31:38   Additional Information  Earth MOID = .846257 au   Jupiter MOID = 2.65526 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 15.07   n/a MPCxxxxx   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-Aug-02 02:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin