+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   6615 Plutarchos (9512 P-L) Classification: Main-belt Asteroid          SPK-ID: 2006615 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ 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 .1265563546022888 3.1627e-08   a 2.170383128438743 5.0625e-09 au q 1.895707351613225 6.7975e-08 au i 1.797458690141116 2.8533e-06 deg node 129.3534108056024 0.00010421 deg peri 81.35133014806674 0.00010501 deg M 83.19805206067066 1.1594e-05 deg tp 2458930.593283815082 (2020-Mar-22.09328382) 3.7834e-05 TDB period 1167.892942441895 3.20 4.0862e-06 1.119e-08 d yr n .3082474316929188 1.0785e-09 deg/d Q 2.445058905264262 5.7032e-09 au   Orbit Determination Parameters    # obs. used (total)      2081      data-arc span      21879 days (59.90 yr)      first obs. used      1960-10-17      last obs. used      2020-09-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48375      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:34:25   Additional Information  Earth MOID = .890101 au   Jupiter MOID = 2.51529 au   T_jup = 3.678  [ 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 14.7   n/a MPO467717   diameter diameter 3.139 km 0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 2.3247 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Oey, J.; Pray, D.P.; Pravec, P. (2007) Minor Planet Bull. 34, 101.] geometric albedo albedo 0.412   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   6615 Plutarchos (9512 P-L)          Discovered 1960-Oct-17 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  9512 P-L = 1991 EW  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-05 14:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin