+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   79137 (1991 PD15) Classification: Mars-crossing Asteroid          SPK-ID: 2079137 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250888 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.3045580 n/a   a 2.2628500 n/a AU q 1.5736809 n/a AU i 5.66348 n/a deg node 291.06709 n/a deg peri 35.13598 n/a deg M 133.19630 n/a deg tp 2455940.4852667 (2012-Jan-13.98526670) n/a JED period 1243.3175996 3.40 n/a n/a d yr n 0.28954790 n/a deg/d Q 2.9520191 n/a AU   Orbit Determination Parameters    # obs. used (total)      340      first obs. used      1991-??-??      last obs. used      2013-01-01      # oppositions      11      planetary ephem.      DE403      condition code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.550  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.5 mag n/a MPO250888   79137 (1991 PD15)          Discovered 1991-Aug-06 by Holt, H. E. at Palomar (675) Reference: 20040504/Numbers.arc Last Updated: 2004-07-16 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-20 07:09 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin