+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3216 Harrington (1980 RB) Classification: Main-belt Asteroid          SPK-ID: 2003216 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3030803828344326 1.3191e-08   a 2.396061760739076 6.399e-09 au q 1.669862444999332 3.2326e-08 au i 4.911450775239265 1.1923e-06 deg node 107.8867771292203 1.1271e-05 deg peri 224.7171719081475 1.1731e-05 deg M 312.9703252292815 5.264e-06 deg tp 2459377.476219590302 (2021-Jun-11.97621959) 2.0256e-05 TDB period 1354.70720057321 3.71 5.4269e-06 1.486e-08 d yr n .265740080105631 1.0645e-09 deg/d Q 3.12226107647882 8.3384e-09 au   Orbit Determination Parameters    # obs. used (total)      2146      data-arc span      24090 days (65.95 yr)      first obs. used      1954-08-04      last obs. used      2020-07-18      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4609      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 14:50:39   Additional Information  Earth MOID = .66182 au   Jupiter MOID = 2.2635 au   T_jup = 3.460  [ 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 13.75   n/a E2021B10   diameter diameter 4.029 km 0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.433   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   SMASSII spectral type spec_B S   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) 3216 Harrington (1980 RB)          Discovered 1980-Sep-04 by Bowell, E. at Flagstaff (AM) Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory. Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1980 RB = 1969 TH3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-29 08:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin