+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   227113 (2005 NM55) Classification: Main-belt Asteroid          SPK-ID: 2227113 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2730616111539466 5.9466e-08   a 2.34820783679593 1.2857e-08 au q 1.70700242155611 1.4035e-07 au i 7.656876922857479 6.5109e-06 deg node 323.1103869311204 4.3663e-05 deg peri 3.605283468651154 4.484e-05 deg M 84.40752381136365 1.1278e-05 deg tp 2458892.336012029083 (2020-Feb-12.83601203) 4.0337e-05 TDB period 1314.326385376024 3.60 1.0794e-05 2.955e-08 d yr n .2739045673932852 2.2495e-09 deg/d Q 2.98941325203575 1.6367e-08 au   Orbit Determination Parameters    # obs. used (total)      250      data-arc span      14723 days (40.31 yr)      first obs. used      1980-09-13      last obs. used      2021-01-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59621      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 13:10:50   Additional Information  Earth MOID = .693461 au   Jupiter MOID = 2.36572 au   T_jup = 3.497  [ 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 17.1   n/a MPO460000   diameter diameter 1.885 km 0.496 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.086   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   227113 (2005 NM55)          Discovered 2005-Jul-07 by Broughton, J. at Reedy Creek Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 [ show close-approach data ] Alternate Designations  2005 NM55 = 1980 RD7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-13 02:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin