+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15479 (1999 CH9) Classification: Main-belt Asteroid          SPK-ID: 2015479 [ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1897786498985756 3.3571e-08   a 2.402832310941663 6.1325e-09 au q 1.94682603903848 7.9602e-08 au i 9.347809478542253 3.475e-06 deg node 191.1081029944669 1.7888e-05 deg peri 214.6638671969588 1.9889e-05 deg M 14.24755492539552 7.0897e-06 deg tp 2459146.657965631985 (2020-Oct-24.15796563) 2.6834e-05 TDB period 1360.453247871734 3.72 5.2082e-06 1.426e-08 d yr n .2646176930836667 1.013e-09 deg/d Q 2.858838582844847 7.2963e-09 au   Orbit Determination Parameters    # obs. used (total)      1841      data-arc span      11127 days (30.46 yr)      first obs. used      1990-09-16      last obs. used      2021-03-04      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46333      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:59:45   Additional Information  Earth MOID = .961832 au   Jupiter MOID = 2.56881 au   T_jup = 3.482  [ 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 14.56   n/a E2021B10   diameter diameter 6.401 km 0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.085   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15479 (1999 CH9)          Discovered 1999-Feb-08 by Kawasato, N. at Uenohara Reference: 20000621/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 CH9 = 1990 SV25 = 1990 SW27 = 1990 SX20  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 08:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin