+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   53 Kalypso Classification: Main-belt Asteroid          SPK-ID: 2000053 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 123 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2060545137194533 5.1172e-08   a 2.61657083498305 5.3373e-09 AU q 2.077414603968113 1.3444e-07 AU i 5.17006657057929 6.6238e-06 deg node 143.5708150290724 5.2655e-05 deg peri 313.5698392057937 5.3535e-05 deg M 271.8370255341595 8.7345e-06 deg tp 2456779.100257212521 (2014-May-01.60025721) 3.7871e-05 JED period 1545.956150212656 4.23 4.7302e-06 1.295e-08 d yr n .2328655958000359 7.1251e-10 deg/d Q 3.155727065997985 6.4371e-09 AU   Orbit Determination Parameters    # obs. used (total)      1430      # delay obs. used      1      # Doppler obs. used      0      data-arc span      53587 days (146.71 yr)      first obs. used      1866-01-01      last obs. used      2012-09-19      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .59836      data source      ORB      producer      Otto Matic      solution date      2013-Mar-29 14:59:48   Additional Information  Earth MOID = 1.09753 AU   T_jup = 3.371  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 8.81 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12 diameter diameter 115.38 km 2.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12 rotation period rot_per 9.036 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Pilcher, F.; Pray, D.P. (2010) Minor Planet Bul. 37, 75-76.] [Pilcher, F.; Pray, D.P. (2010) Minor Planet Bul. 37, 75-76.] [Pilcher, F. (2011) Minor Planet Bul. 38, 206-208.] geometric albedo albedo 0.0397   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12 B-V BV .705 mag .023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=3.20, mean=10.87, max.=26.64) deg. U-B UB .318 mag .015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=3.20, mean=10.87, max.=26.64) deg. Tholen spectral type spec_T XC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 53 Kalypso          Discovered 1858-Apr-04 by Luther, R. at Dusseldorf Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1951 CD2 = 1951 CE2 = 1972 JB = A917 BD  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-18 12:33 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin