+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70644 (1999 TU242) Classification: Main-belt Asteroid          SPK-ID: 2070644 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06754985357665452 5.1722e-08   a 2.576941524421541 1.3471e-08 au q 2.402869501771265 1.3968e-07 au i 8.363285049111001 4.6763e-06 deg node 145.9024443406647 2.5834e-05 deg peri 214.240483425135 3.8524e-05 deg M 28.52155778713857 2.8306e-05 deg tp 2458880.791217521010 (2020-Feb-01.29121752) 0.00011874 TDB period 1510.96801984181 4.14 1.1848e-05 3.244e-08 d yr n .2382578554096003 1.8682e-09 deg/d Q 2.751013547071818 1.438e-08 au   Orbit Determination Parameters    # obs. used (total)      953      data-arc span      8308 days (22.75 yr)      first obs. used      1997-02-02      last obs. used      2019-11-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57525      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 16:13:31   Additional Information  Earth MOID = 1.4025 au   Jupiter MOID = 2.56432 au   T_jup = 3.409  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.2   n/a MPO502590   diameter diameter 4.563 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.053   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70644 (1999 TU242)          Discovered 1999-Oct-04 by CSS at Catalina Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 TU242 = 1997 CK10  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-21 07:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin