+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11867 (1989 TW) Classification: Main-belt Asteroid          SPK-ID: 2011867 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1614229742759379 3.3276e-08   a 2.225586878722081 5.5825e-09 au q 1.866326025249262 7.2659e-08 au i 4.638284539399661 3.6377e-06 deg node 284.6864376549838 4.344e-05 deg peri 84.9763023365868 4.5209e-05 deg M 90.17254200105187 1.1402e-05 deg tp 2458696.735465491142 (2019-Aug-01.23546549) 3.8242e-05 TDB period 1212.733166842665 3.32 4.5629e-06 1.249e-08 d yr n .296850131457405 1.1169e-09 deg/d Q 2.584847732194901 6.4837e-09 au   Orbit Determination Parameters    # obs. used (total)      1485      data-arc span      11369 days (31.13 yr)      first obs. used      1989-09-27      last obs. used      2020-11-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49334      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 20:17:21   Additional Information  Earth MOID = .87256 au   Jupiter MOID = 2.90237 au   T_jup = 3.625  [ 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 15.0   n/a MPO395116   diameter diameter 3.085 km 0.102 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.223   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11867 (1989 TW)          Discovered 1989-Oct-04 by Suzuki, K., Furuta, T. at Toyota Reference: 19991026/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1989 TW = 1994 CG  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-24 14:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin