+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102275 (1999 TW50) Classification: Main-belt Asteroid          SPK-ID: 2102275 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09739555548791454 5.7842e-08   a 2.711316782487057 1.5497e-08 au q 2.447246578353025 1.5795e-07 au i 2.94139199072742 6.3799e-06 deg node 189.9654214480375 7.8127e-05 deg peri 192.8738807595162 8.1037e-05 deg M 207.1753884108787 2.3183e-05 deg tp 2459692.744669438160 (2022-Apr-23.24466944) 0.00010768 TDB period 1630.680283799768 4.46 1.3981e-05 3.828e-08 d yr n .2207667582520453 1.8928e-09 deg/d Q 2.975386986621089 1.7006e-08 au   Orbit Determination Parameters    # obs. used (total)      633      data-arc span      7589 days (20.78 yr)      first obs. used      1999-09-14      last obs. used      2020-06-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57328      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:55:46   Additional Information  Earth MOID = 1.45036 au   Jupiter MOID = 2.46104 au   T_jup = 3.354  [ 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 15.60   n/a E2021B55   diameter diameter 3.334 km 0.448 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.110   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   102275 (1999 TW50)          Discovered 1999-Oct-04 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 Alternate Designations  1999 TW50 = 2002 GH74  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-02 09:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin