+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   3757 (1982 XB) Classification: Amor [NEO, PHA]          SPK-ID: 2003757 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4456895338571047 3.5167e-08   a 1.834720663763957 1.57e-09 AU q 1.017004866373001 6.4772e-08 AU i 3.868692070934441 7.3432e-06 deg node 74.98628779277837 4.8775e-05 deg peri 17.12967922622996 5.2163e-05 deg M 68.10584031089122 6.8089e-06 deg tp 2456228.774333636053 (2012-Oct-28.27433364) 1.698e-05 JED period 907.7230323980724 2.49 1.1652e-06 3.19e-09 d yr n .3965967449883168 5.0907e-10 deg/d Q 2.652436461154912 2.2698e-09 AU   Orbit Determination Parameters    # obs. used (total)      151      # delay obs. used      0      # Doppler obs. used      2      data-arc span      11114 days (30.43 yr)      first obs. used      1982-12-14      last obs. used      2013-05-19      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .81922      data source      ORB      producer      Otto Matic      solution date      2013-May-20 01:15:34   Additional Information  Earth MOID = .0367355 AU   T_jup = 3.897  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 18.95 mag n/a PDS3 (MPC 17270)   diameter diameter 0.5 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543   rotation period rot_per 9.0046 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Harris, A.W.; Young, J.W. (1985) Bul. Amer. Astron. Soc. 17, 726.] [Binzel, R.P. (1987) Icarus 72, 135-208.] [Harris, A.W.; Young, J.W.; Bowell, E.; Tholen, D.J. (1999) Icarus 142, 173-201.] geometric albedo albedo 0.18   n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543   B-V BV .859 mag .012 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=31.70, mean=39.95, max.=44.15) deg. U-B UB .522 mag .009 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=31.70, mean=39.95, max.=44.15) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices; used ground-based radiometric albedo 3757 (1982 XB)          Discovered 1982-Dec-14 by Helin, E. F. at Palomar (675) Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-22 21:59 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin