+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   7556 Perinaldo (1982 FX2) Classification: Main-belt Asteroid          SPK-ID: 2007556 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ 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 .1180111501653146 3.9697e-08   a 2.907521869536523 1.2786e-08 au q 2.564401869581712 1.1652e-07 au i 2.633525644981503 4.8662e-06 deg node 15.93050747716229 6.8421e-05 deg peri 19.92060668662246 7.1488e-05 deg M 23.73053042310993 1.8582e-05 deg tp 2458881.132016639719 (2020-Feb-01.63201664) 9.3566e-05 TDB period 1810.851811717296 4.96 1.1945e-05 3.27e-08 d yr n .1988014688284179 1.3114e-09 deg/d Q 3.250641869491333 1.4295e-08 au   Orbit Determination Parameters    # obs. used (total)      2218      data-arc span      13836 days (37.88 yr)      first obs. used      1982-03-18      last obs. used      2020-02-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4699      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 18:32:28   Additional Information  Earth MOID = 1.57137 au   Jupiter MOID = 2.16608 au   T_jup = 3.273  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.8   n/a MPO328759   diameter diameter 9.604 km 0.519 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.159   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   7556 Perinaldo           Discovered 1982 Mar. 18 by H. Debehogne at the European Southern Observatory. Perinaldo is a village in Liguria, Italy, where the astronomer Giovanni Domenico Cassini (1625-1712) was born. A well-organized group of amateur astronomers in Perinaldo is today very active in the popularization of astronomy. The name was suggested by M. Di Martino. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20120207/MPCPages.arc Last Updated: 2012-02-09 Alternate Designations  1982 FX2 = 1995 XF  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-11 01:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin