+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21191 (1994 JL6) Classification: Main-belt Asteroid          SPK-ID: 2021191 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0138054457872707 3.6458e-08   a 2.529067339349537 9.2664e-09 au q 2.49415243730379 9.1345e-08 au i 2.322849916840606 4.7127e-06 deg node 200.3249557096199 8.5207e-05 deg peri 102.5515441459701 0.00022564 deg M 147.9096265355474 0.00020607 deg tp 2458596.922619042420 (2019-Apr-23.42261904) 0.00084106 TDB period 1469.05825019109 4.02 8.0738e-06 2.21e-08 d yr n .2450549526903869 1.3468e-09 deg/d Q 2.563982241395284 9.3943e-09 au   Orbit Determination Parameters    # obs. used (total)      1117      data-arc span      9786 days (26.79 yr)      first obs. used      1994-05-04      last obs. used      2021-02-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55089      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:41:10   Additional Information  Earth MOID = 1.47789 au   Jupiter MOID = 2.43553 au   T_jup = 3.450  [ 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 15.1   n/a MPO431744   diameter diameter 2.409 km 0.304 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.304   0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21191 (1994 JL6)          Discovered 1994-May-04 by Spacewatch at Kitt Peak Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1994 JL6 = 1999 RU73  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-22 10:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin