+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15711 (1989 GZ1) Classification: Main-belt Asteroid          SPK-ID: 2015711 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05835211776620211 3.5454e-08   a 2.288234324393758 8.193e-09 au q 2.154711005620068 8.276e-08 au i 2.051668250680665 3.4468e-06 deg node 253.6957964302176 0.00011691 deg peri 48.39064270292728 0.00012175 deg M 323.9932475776976 3.543e-05 deg tp 2459326.953432506572 (2021-Apr-22.45343251) 0.00012458 TDB period 1264.297184273946 3.46 6.7902e-06 1.859e-08 d yr n .2847431794343028 1.5293e-09 deg/d Q 2.421757643167449 8.671e-09 au   Orbit Determination Parameters    # obs. used (total)      1289      data-arc span      11373 days (31.14 yr)      first obs. used      1989-04-03      last obs. used      2020-05-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51398      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:06:40   Additional Information  Earth MOID = 1.13784 au   Jupiter MOID = 2.6789 au   T_jup = 3.597  [ 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 15.37   n/a E2021B10   diameter diameter 2.522 km 0.489 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.211   0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15711 (1989 GZ1)          Discovered 1989-Apr-03 by Elst, E. W. at La Silla Reference: 20000726/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1989 GZ1 = 1990 TD11  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-21 12:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin