+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   16863 (1997 YJ16) Classification: Main-belt Asteroid          SPK-ID: 2016863 [ 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 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1803349846975999 7.1845e-09   a 2.304588948572536 8.1098e-09 au q 1.88899093579745 1.4694e-08 au i 8.906784817327694 9.5121e-07 deg node 17.67652158602501 3.4545e-06 deg peri 63.6091495490043 8.041e-06 deg M 206.3855285291619 8.1085e-06 deg tp 2459745.778368678971 (2022-Jun-15.27836868) 3.0216e-05 TDB period 1277.875781134949 3.50 6.7453e-06 1.847e-08 d yr n .2817175231854421 1.487e-09 deg/d Q 2.720186961347622 9.5723e-09 au   Orbit Determination Parameters    # obs. used (total)      1692      data-arc span      23670 days (64.80 yr)      first obs. used      1955-10-23      last obs. used      2020-08-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48846      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:44:35   Additional Information  Earth MOID = .922811 au   Jupiter MOID = 2.57117 au   T_jup = 3.551  [ 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 14.13   n/a E2021B10   diameter diameter 7.969 km 0.173 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.101   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   16863 (1997 YJ16)          Discovered 1997-Dec-31 by Shimizu, Y., Urata, T. at Nachi-Katsuura Reference: 20000913/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1997 YJ16 = 1988 EV = 1990 WA14  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 09:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin