+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102224 Raffaellolena (1999 TG12) Classification: Main-belt Asteroid          SPK-ID: 2102224 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1931737097498218 3.9173e-08   a 2.381604478965381 9.7074e-09 au q 1.921541106606847 9.6633e-08 au i 2.858081166528004 3.9986e-06 deg node 151.1716130793571 7.601e-05 deg peri 237.1681339004149 7.6787e-05 deg M 277.5246917572399 1.3976e-05 deg tp 2459508.056090014560 (2021-Oct-20.55609001) 5.3446e-05 TDB period 1342.464729920679 3.68 8.2078e-06 2.247e-08 d yr n .2681634697555675 1.6396e-09 deg/d Q 2.841667851323916 1.1583e-08 au   Orbit Determination Parameters    # obs. used (total)      696      data-arc span      8535 days (23.37 yr)      first obs. used      1997-02-10      last obs. used      2020-06-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53964      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:56:02   Additional Information  Earth MOID = .926824 au   Jupiter MOID = 2.60637 au   T_jup = 3.511  [ 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 16.25   n/a E2021B55   diameter diameter 1.540 km 0.240 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.247   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   102224 Raffaellolena           Discovered 1999 Oct. 10 by S. Sposetti at Gnosca. Raffaello Lena (b. 1959) is an Italian lunar observer. He founded Selenology Today, a journal that has produced high quality amateur lunar studies. He is the Lunar Domes Coordinator of the British Astronomical Association. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2018-10-26 Last Updated: 2019-04-09 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-09 01:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin