+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   7600 Vacchi (1994 RB1) Classification: Main-belt Asteroid          SPK-ID: 2007600 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .02358482788785572 3.8887e-08   a 2.712029757091333 1.111e-08 au q 2.648067002043591 1.0535e-07 au i 8.568099704570491 4.442e-06 deg node 220.6397573806654 2.4525e-05 deg peri 181.3070102471652 8.4893e-05 deg M 229.0152920097045 8.1895e-05 deg tp 2459594.051214508355 (2022-Jan-14.55121451) 0.00037198 TDB period 1631.323537697539 4.47 1.0024e-05 2.744e-08 d yr n .2206797068030456 1.3561e-09 deg/d Q 2.775992512139075 1.1372e-08 au   Orbit Determination Parameters    # obs. used (total)      1923      data-arc span      10805 days (29.58 yr)      first obs. used      1990-11-11      last obs. used      2020-06-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48231      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 16:42:21   Additional Information  Earth MOID = 1.65564 au   Jupiter MOID = 2.31985 au   T_jup = 3.346  [ 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 13.4   n/a MPO384824   diameter diameter 9.084 km 0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.112   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   7600 Vacchi (1994 RB1)          Discovered 1994-Sep-09 by Casulli, V. S., Valentini, S. at Colleverde Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1994 RB1 = 1990 VR2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-04 14:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin