+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   134510 (1999 FT21) Classification: Outer Main-belt Asteroid          SPK-ID: 2134510 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1180557980959014 5.5762e-08   a 3.204243257896414 2.9822e-08 au q 2.825963762792042 1.8202e-07 au i 2.439433827186009 5.0149e-06 deg node 107.24770150158 0.00016323 deg peri 133.6571483096824 0.00016545 deg M 209.059793909212 3.0745e-05 deg tp 2459878.893439555568 (2022-Oct-26.39343956) 0.00018638 TDB period 2095.012630695645 5.74 2.9248e-05 8.008e-08 d yr n .1718366728321168 2.399e-09 deg/d Q 3.582522753000786 3.3343e-08 au   Orbit Determination Parameters    # obs. used (total)      357      data-arc span      8455 days (23.15 yr)      first obs. used      1996-11-18      last obs. used      2020-01-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .61865      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 07:29:35   Additional Information  Earth MOID = 1.81407 au   Jupiter MOID = 1.42773 au   T_jup = 3.181  [ 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 15.3   n/a MPO459635   diameter diameter 4.181 km 0.946 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.077   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   134510 (1999 FT21)          Discovered 1999-Mar-24 by Santangelo, M. M. M. at Monte Agliale Reference: 20060907/Numbers.arc Last Updated: 2006-09-10 [ show close-approach data ] Alternate Designations  1999 FT21 = 2004 BZ36  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-26 16:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin