+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   31028 Cerulli (1996 HH1) Classification: Main-belt Asteroid          SPK-ID: 2031028 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1364026077984888 2.7927e-08   a 2.207873942473268 6.067e-09 au q 1.906714179029584 6.4397e-08 au i 3.678715486123248 3.2634e-06 deg node 130.4992038811319 4.4589e-05 deg peri 285.4626348734817 4.6525e-05 deg M 259.6656044710982 1.3235e-05 deg tp 2459334.469783911307 (2021-Apr-29.96978391) 4.456e-05 TDB period 1198.284213248066 3.28 4.9391e-06 1.352e-08 d yr n .3004295608837113 1.2383e-09 deg/d Q 2.509033705916953 6.8946e-09 au   Orbit Determination Parameters    # obs. used (total)      1652      data-arc span      23741 days (65.00 yr)      first obs. used      1955-11-11      last obs. used      2020-11-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51918      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 03:33:45   Additional Information  Earth MOID = .922428 au   Jupiter MOID = 2.80149 au   T_jup = 3.645  [ 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 15.5   n/a MPO337516   diameter diameter 2.449 km 0.761 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.245   0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   31028 Cerulli           Discovered 1996 Apr. 18 at the Osservatorio San Vittore. Italian astronomer Vincenzo Cerulli (1859-1927) founded the private Collurania Observatory near Teramo, where he discovered the bright minor planet (704) Interamnia in 1910 and observed Mars and several comets. He arranged for the observatory to be donated to his country on his death. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20090806/MPCPages.arc Last Updated: 2011-05-09 [ show close-approach data ] Alternate Designations  1996 HH1 = 1989 CB5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 18:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin