+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   3728 IRAS (1983 QF) Classification: Main-belt Asteroid          SPK-ID: 2003728 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO236414 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2127171 n/a   a 2.6497633 n/a AU q 2.0861133 n/a AU i 22.58682 n/a deg node 167.39077 n/a deg peri 281.25277 n/a deg M 270.54056 n/a deg tp 2456792.0008682 (2014-May-14.50086820) n/a JED period 1575.4660721 4.31 n/a n/a d yr n 0.22850381 n/a deg/d Q 3.2134133 n/a AU   Orbit Determination Parameters    # obs. used (total)      968      first obs. used      1950-??-??      last obs. used      2012-07-20      # oppositions      19      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.251  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.50 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12 diameter diameter 19.55 km 1.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12 rotation period rot_per 8.323 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Warner, B.D. (2009) Minor Planet Bul. 36, 7-13.] geometric albedo albedo 0.1161   0.023 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12 3728 IRAS (1983 QF)          Discovered 1983-Aug-23 by IRAS Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1983 QF = 1948 RN = 1963 FA = 1972 FH = 1976 GL = 1985 GT  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-20 09:35 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin