+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1181981397360758 1.834e-08   a 2.908120556695247 1.0977e-08 au q 2.564386116765627 5.1085e-08 au i 2.633434822510732 7.9915e-07 deg node 15.92410953360662 8.3505e-06 deg peri 19.96077190077657 1.6178e-05 deg M 63.44026253496019 1.2352e-05 deg tp 2458881.287781034218 (2020-Feb-01.78778103) 6.2193e-05 TDB period 1811.411148627485 4.96 1.0256e-05 2.808e-08 d yr n .1987400818818929 1.1252e-09 deg/d Q 3.251854996624866 1.2274e-08 au   Orbit Determination Parameters    # obs. used (total)      2682      data-arc span      14241 days (38.99 yr)      first obs. used      1982-03-18      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .44606      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 19:49:05   Additional Information  Earth MOID = 1.57026 au   Jupiter MOID = 2.16574 au   T_jup = 3.272  [ 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 12.85   n/a E2021B10   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 ] 2021-Apr-17 00:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin