+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .02291687605908695 1.8903e-08   a 2.712625127814007 1.0811e-08 au q 2.650460233965128 5.5424e-08 au i 8.564084162782672 1.032e-06 deg node 220.558011583828 5.1362e-06 deg peri 181.3273368441459 4.7526e-05 deg M 273.1339544627776 4.9407e-05 deg tp 2459594.259140177118 (2022-Jan-14.75914018) 0.00022461 TDB period 1631.860752807272 4.47 9.7551e-06 2.671e-08 d yr n .2206070581578091 1.3188e-09 deg/d Q 2.774790021662886 1.1058e-08 au   Orbit Determination Parameters    # obs. used (total)      2049      data-arc span      10958 days (30.00 yr)      first obs. used      1990-11-11      last obs. used      2020-11-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47209      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 19:52:28   Additional Information  Earth MOID = 1.65688 au   Jupiter MOID = 2.31639 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 13.43   n/a E2021B10   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 ] 2021-Apr-21 05:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin