+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21661 Olgagermani (1999 RA) Classification: Main-belt Asteroid          SPK-ID: 2021661 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2484036028671161 3.8741e-08   a 2.360476531289905 9.5965e-09 au q 1.77412565643422 9.083e-08 au i 5.617421877929585 4.7052e-06 deg node 166.0964895969344 3.8984e-05 deg peri 166.726966804991 4.0391e-05 deg M 307.8008360343798 1.5172e-05 deg tp 2459392.569764424084 (2021-Jun-27.06976442) 5.6738e-05 TDB period 1324.640280411603 3.63 8.078e-06 2.212e-08 d yr n .2717718956033391 1.6573e-09 deg/d Q 2.946827406145591 1.198e-08 au   Orbit Determination Parameters    # obs. used (total)      1286      data-arc span      13144 days (35.99 yr)      first obs. used      1984-05-30      last obs. used      2020-05-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54765      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 01:55:40   Additional Information  Earth MOID = .762677 au   Jupiter MOID = 2.43898 au   T_jup = 3.503  [ 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 14.88   n/a E2021B10   diameter diameter 5.736 km 0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.069   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21661 Olgagermani           Discovered 1999 Sept. 1 by G. Masi at Ceccano. Italian poetess Olga Germani (1900-1983) worked with young students and performed for school festivities and charity. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020427/MPCPages.arc Last Updated: 2003-10-02 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-10 12:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin