+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2484881156585365 3.8569e-08   a 2.361034316346546 9.347e-09 au q 1.774345348072452 9.0468e-08 au i 5.618128475425454 4.6708e-06 deg node 166.0879659650327 3.8656e-05 deg peri 166.6681132041718 3.9955e-05 deg M 1.107378161430159 1.444e-05 deg tp 2459392.423895311249 (2021-Jun-26.92389531) 5.3134e-05 TDB period 1325.109830642942 3.63 7.8689e-06 2.154e-08 d yr n .2716755937319765 1.6133e-09 deg/d Q 2.94772328462064 1.167e-08 au   Orbit Determination Parameters    # obs. used (total)      1327      data-arc span      13544 days (37.08 yr)      first obs. used      1984-05-30      last obs. used      2021-06-29      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54478      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 18:36:00   Additional Information  Earth MOID = .764017 au   Jupiter MOID = 2.43768 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 14.89   n/a MPCxxxxx   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-Jul-31 07:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin