+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   20624 Dariozanetti (1999 TB12) Classification: Main-belt Asteroid          SPK-ID: 2020624 [ 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 .1013086958448225 1.1208e-08   a 2.564794217563898 9.2885e-09 au q 2.304958260272157 3.2298e-08 au i 14.19323328273953 1.1901e-06 deg node 48.84871164511281 3.5376e-06 deg peri 87.78336273920047 1.0771e-05 deg M 325.8387176038746 1.1143e-05 deg tp 2459342.866851458395 (2021-May-08.36685146) 4.6573e-05 TDB period 1500.296913058368 4.11 8.1501e-06 2.231e-08 d yr n .2399525033122523 1.3035e-09 deg/d Q 2.824630174855638 1.023e-08 au   Orbit Determination Parameters    # obs. used (total)      1878      data-arc span      12128 days (33.20 yr)      first obs. used      1987-12-23      last obs. used      2021-03-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47438      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:25:18   Additional Information  Earth MOID = 1.37018 au   Jupiter MOID = 2.29797 au   T_jup = 3.383  [ 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 13.92   n/a E2021B10   diameter diameter 3.621 km 0.736 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.309   0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   20624 Dariozanetti           Discovered 1999 Oct. 9 by S. Sposetti at Gnosca. Dario Zanetti (b. 1959) is a skilled artisan and friend of the discoverer. He helped greatly in the construction of the observatory where this minor planet was discovered. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020724/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1999 TB12 = 1987 YF4 = 1992 AN6 = 1997 GF32  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-21 12:21 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin