+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   150310 (1999 UF12) Classification: Outer Main-belt Asteroid          SPK-ID: 2150310 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1760616495914559 5.782e-08   a 3.201040914350039 2.6128e-08 au q 2.637460370559829 1.7643e-07 au i 18.12070800569181 7.3038e-06 deg node 26.18570868624023 1.5956e-05 deg peri 79.88331658288286 2.9546e-05 deg M 191.1493425966455 2.1844e-05 deg tp 2460181.650251885481 (2023-Aug-25.15025189) 0.00013008 TDB period 2091.872759695611 5.73 2.5611e-05 7.012e-08 d yr n .1720945972126831 2.107e-09 deg/d Q 3.764621458140249 3.0728e-08 au   Orbit Determination Parameters    # obs. used (total)      598      data-arc span      7181 days (19.66 yr)      first obs. used      1999-10-02      last obs. used      2019-05-31      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5276      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:18:01   Additional Information  Earth MOID = 1.72643 au   Jupiter MOID = 1.73971 au   T_jup = 3.093  [ 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 14.6   n/a MPO436758   diameter diameter 7.530 km 0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.045   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   150310 (1999 UF12)          Discovered 1999-Oct-31 by Spacewatch at Kitt Peak Reference: 20070303/Numbers.arc Last Updated: 2007-03-07 [ show close-approach data ] Alternate Designations  1999 UF12 = 2001 AQ28  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-21 09:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin