+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   190344 (1998 TO29) Classification: Main-belt Asteroid          SPK-ID: 2190344 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08014386537305715 4.938e-08   a 3.100972175010655 2.4469e-08 au q 2.852448278491005 1.4889e-07 au i 11.08794659213223 6.707e-06 deg node 30.22275923114828 2.1377e-05 deg peri 287.2071314558145 4.4902e-05 deg M 91.60201861063726 3.9559e-05 deg tp 2458692.986295234148 (2019-Jul-28.48629523) 0.0002179 TDB period 1994.55139184553 5.46 2.3607e-05 6.463e-08 d yr n .1804917143132106 2.1363e-09 deg/d Q 3.349496071530305 2.643e-08 au   Orbit Determination Parameters    # obs. used (total)      429      data-arc span      8144 days (22.30 yr)      first obs. used      1998-10-15      last obs. used      2021-01-31      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .60655      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 22:07:15   Additional Information  Earth MOID = 1.86381 au   Jupiter MOID = 1.93443 au   T_jup = 3.188  [ 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 15.29   n/a E2021B55   diameter diameter 5.558 km 0.471 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.040   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   190344 (1998 TO29)          Discovered 1998-Oct-15 by Spacewatch at Kitt Peak Reference: 20080917/Numbers.arc Last Updated: 2008-09-19 [ show close-approach data ] Alternate Designations  1998 TO29 = 2003 SQ24  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-21 00:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin