+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   134375 (1995 SP18) Classification: Outer Main-belt Asteroid          SPK-ID: 2134375 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1306879956260125 5.917e-08   a 3.23292917768175 2.5109e-08 au q 2.810424143449669 1.9417e-07 au i 5.29335776131765 5.886e-06 deg node 7.57507882130022 5.1638e-05 deg peri 310.8278209408394 5.5022e-05 deg M 166.832797195968 2.1723e-05 deg tp 2458216.553140801135 (2018-Apr-08.05314080) 0.00012528 TDB period 2123.208837022078 5.81 2.4735e-05 6.772e-08 d yr n .169554682385799 1.9753e-09 deg/d Q 3.655434211913831 2.839e-08 au   Orbit Determination Parameters    # obs. used (total)      782      data-arc span      10214 days (27.96 yr)      first obs. used      1993-03-24      last obs. used      2021-03-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56547      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 18:08:06   Additional Information  Earth MOID = 1.79927 au   Jupiter MOID = 1.67639 au   T_jup = 3.166  [ 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 14.7   n/a MPO469409   diameter diameter 4.993 km 1.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.123   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   134375 (1995 SP18)          Discovered 1995-Sep-18 by Spacewatch at Kitt Peak Reference: 20060907/Numbers.arc Last Updated: 2006-09-10 [ show close-approach data ] Alternate Designations  1995 SP18 = 2001 TD97  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-15 05:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin