+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   9882 Stallman (1994 SS9) Classification: Main-belt Asteroid          SPK-ID: 2009882 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .182650831812524 3.4416e-08   a 2.392862965288649 7.2334e-09 au q 1.955804554265294 8.2262e-08 au i .9918632892950504 4.6988e-06 deg node 148.7597113758724 0.00020463 deg peri 156.9492687386461 0.00020496 deg M 21.60731072096926 1.1394e-05 deg tp 2458919.352828672422 (2020-Mar-10.85282867) 4.2729e-05 TDB period 1351.995260084719 3.70 6.1305e-06 1.678e-08 d yr n .2662731228639379 1.2074e-09 deg/d Q 2.829921376312003 8.5546e-09 au   Orbit Determination Parameters    # obs. used (total)      1037      data-arc span      15035 days (41.16 yr)      first obs. used      1979-08-26      last obs. used      2020-10-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53582      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:10:26   Additional Information  Earth MOID = .940819 au   Jupiter MOID = 2.41047 au   T_jup = 3.508  [ 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 15.9   n/a MPO467770   diameter diameter 4.234 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.039   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   9882 Stallman           Discovered 1994 Sept. 28 by Spacewatch at Kitt Peak. Richard Stallman (b. 1953) is the founder of the GNU project and an advocate and developer of free software. He created the GNU system of tools, which made possible the GNU/Linux operating system. This operating system is used by several minor-planet surveys for data collection and analysis. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20001111/MPCPages.arc Last Updated: 2013-03-29 [ show close-approach data ] Alternate Designations  1994 SS9 = 1979 QV4 = 1997 HE18  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Nov-28 00:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin