+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   53 Kalypso (A858 GA) Classification: Main-belt Asteroid          SPK-ID: 2000053 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 164 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2037099671162014 3.2468e-08   a 2.621253887601841 5.0324e-09 au q 2.087278344355255 8.5232e-08 au i 5.175708155621644 4.0525e-06 deg node 143.4736860809344 4.0659e-05 deg peri 313.6513557650405 4.1404e-05 deg M 203.5664513062021 8.9816e-06 deg tp 2459874.080420753035 (2022-Oct-21.58042075) 4.0008e-05 TDB period 1550.108359081842 4.24 4.4639e-06 1.222e-08 d yr n .232241828702372 6.688e-10 deg/d Q 3.155229430848427 6.0575e-09 au   Orbit Determination Parameters    # obs. used (total)      3194      # delay obs. used      1      # Doppler obs. used      0      data-arc span      56537 days (154.79 yr)      first obs. used      1866-01-01      last obs. used      2020-10-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44233      source      ORB      producer      Otto Matic      solution date      2021-Feb-23 18:07:44   Additional Information  Earth MOID = 1.10781 au   Jupiter MOID = 2.03186 au   T_jup = 3.369  [ hide covariance matrix ] Orbital Elements at Epoch 2455759.5 (2011-Jul-17.0) TDB Reference: JPL 164 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2054507051109968 3.2672e-08   q 2.080150368669158 8.5984e-08 au tp 2455232.124814306317 (2010-Feb-04.62481431) 3.2077e-05 TDB node 143.5839493001703 4.0802e-05 deg peri 313.4958916874923 4.151e-05 deg i 5.168596984005955 4.0479e-06 deg   Orbit Determination Parameters    # obs. used (total)      3194      # delay obs. used      1      # Doppler obs. used      0      data-arc span      56537 days (154.79 yr)      first obs. used      1866-01-01      last obs. used      2020-10-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44233      source      ORB      producer      Otto Matic      solution date      2021-Feb-23 18:07:44   Additional Information  Jupiter MOID = 2.03186 au   T_jup = 3.369  Orbit Covariance (6×6)   e q tp node peri i e 1.067466621776346E-15 -2.806193261670416E-15 3.607566064710678E-14 2.14904298473021E-15 -4.553435113150532E-15 -1.230553993010837E-16 q -2.806193261670416E-15 7.393169014624951E-15 -4.569726929504596E-14 -3.967065369900355E-15 2.159787266585953E-14 4.809505846480112E-16 tp 3.607566064710678E-14 -4.569726929504596E-14 1.028937975919328E-9 2.0491590470747E-12 2.606942934698407E-10 -4.420933559114112E-13 node 2.14904298473021E-15 -3.967065369900355E-15 2.0491590470747E-12 1.664797217209742E-9 -1.656598433701027E-9 2.813356061856447E-12 peri -4.553435113150532E-15 2.159787266585953E-14 2.606942934698407E-10 -1.656598433701027E-9 1.723112765685942E-9 -2.875129949504357E-12 i -1.230553993010837E-16 4.809505846480112E-16 -4.420933559114112E-13 2.813356061856447E-12 -2.875129949504357E-12 1.63851111174446E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 8.92   n/a E2021B10 IRAS observations used: 12 diameter diameter 97.262 km 26.598 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   rotation period rot_per 9.036 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pilcher, F.; Pray, D.P. (2010) Minor Planet Bull. 37, 75-76.] [Pilcher, F. (2011) Minor Planet Bull. 38, 206-208.] [Franco, L.; Pilcher, F.; Pray, D.P.; Maurice, A. (2016) Minor Planet Bull. 43, 224-226.] geometric albedo albedo 0.028   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   B-V BV 0.705   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=3.20, mean=10.87, max.=26.64) deg. U-B UB 0.318   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 (A858 GA)          Discovered 1858-Apr-04 by Luther, R. at Dusseldorf Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A858 GA = 1951 CD2 = 1951 CE2 = 1972 JB = A917 BD  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-07 22:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin