+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4342 Freud (1987 QO9) Classification: Main-belt Asteroid          SPK-ID: 2004342 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09055035458880267 1.3477e-08   a 2.765360683350181 1.0395e-08 au q 2.514956292906889 3.6121e-08 au i 6.080567907098424 1.4132e-06 deg node 133.3611144916528 1.6546e-05 deg peri 181.3026908907449 2.5387e-05 deg M 106.4501434709929 1.4223e-05 deg tp 2458703.827798834968 (2019-Aug-08.32779884) 6.5837e-05 TDB period 1679.678266174757 4.60 9.4705e-06 2.593e-08 d yr n .2143267596239439 1.2084e-09 deg/d Q 3.015765073793474 1.1336e-08 au   Orbit Determination Parameters    # obs. used (total)      3054      data-arc span      25811 days (70.67 yr)      first obs. used      1950-07-14      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45502      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 16:14:02   Additional Information  Earth MOID = 1.49909 au   Jupiter MOID = 2.22016 au   T_jup = 3.325  [ 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 12.48   n/a E2020-QM5   diameter diameter 19.180 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   geometric albedo albedo 0.051   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   SMASSII spectral type spec_B Xc   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 4342 Freud (1987 QO9)          Discovered 1987-Aug-21 by Elst, E. W. at La Silla Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1987 QO9 = 1950 NT1 = 1954 JM = 1962 EG = 1978 RA1 = 1979 YL7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-23 19:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin