+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   152641 Fredreed (1997 RJ3) Classification: Main-belt Asteroid          SPK-ID: 2152641 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2332008738962022 4.521e-08   a 2.585449890336402 1.2849e-08 au q 1.982520716495113 1.1935e-07 au i 3.306095457536517 4.8195e-06 deg node 217.9114838736887 6.3446e-05 deg peri 123.0628100877635 6.4069e-05 deg M 202.5999483253835 8.4293e-06 deg tp 2459864.403539657501 (2022-Oct-11.90353966) 3.6882e-05 TDB period 1518.457406677232 4.16 1.132e-05 3.099e-08 d yr n .2370827119792388 1.7674e-09 deg/d Q 3.188379064177691 1.5846e-08 au   Orbit Determination Parameters    # obs. used (total)      625      data-arc span      10042 days (27.49 yr)      first obs. used      1993-09-16      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50803      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:28:00   Additional Information  Earth MOID = .974832 au   Jupiter MOID = 2.23596 au   T_jup = 3.381  [ 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 16.39   n/a E2021B55   rotation period rot_per 18.28 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 [Result based on fragmentary lightcurve(s), may be completely wrong.] 152641 Fredreed           Discovered 1997 Sept. 5 by D. R. DeGraff and S. Weaver at the Stull Observatory of Alfred University. Frederick Reed (1906-1978), grandfather of the first discoverer, was a dentist in Albany, NY, and amateur astronomer who passed on his love of the night sky to his grandson. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20110615/MPCPages.arc Last Updated: 2013-03-28 [ show close-approach data ] Alternate Designations  1997 RJ3 = 2006 WM193  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-21 03:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin