+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   952 Caia (A916 US) Classification: Main-belt Asteroid          SPK-ID: 2000952 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 45 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2436253828113499 3.8054e-08   a 2.991385221998977 1.1372e-08 au q 2.262607852153261 1.144e-07 au i 9.990601578353417 4.5644e-06 deg node 18.41898042298374 2.0513e-05 deg peri 356.4947032200035 2.1701e-05 deg M 28.04249928546718 7.4813e-06 deg tp 2458853.295475303381 (2020-Jan-04.79547530) 3.9186e-05 TDB period 1889.761263834514 5.17 1.0776e-05 2.95e-08 d yr n .1905002535979196 1.0863e-09 deg/d Q 3.720162591844693 1.4142e-08 au   Orbit Determination Parameters    # obs. used (total)      3043      data-arc span      37999 days (104.04 yr)      first obs. used      1916-10-27      last obs. used      2020-11-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42022      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:57:20   Additional Information  Earth MOID = 1.26397 au   Jupiter MOID = 1.74345 au   T_jup = 3.188  [ hide covariance matrix ] Orbital Elements at Epoch 2456415.5 (2013-May-03.0) TDB Reference: JPL 45 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2470748967265486 3.8909e-08   q 2.250567459490405 1.1777e-07 au tp 2456951.083786303139 (2014-Oct-20.58378630) 3.7127e-05 TDB node 18.616529434109 2.0415e-05 deg peri 354.6055667645751 2.1566e-05 deg i 10.0337503931585 4.5755e-06 deg   Orbit Determination Parameters    # obs. used (total)      3043      data-arc span      37999 days (104.04 yr)      first obs. used      1916-10-27      last obs. used      2020-11-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42022      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:57:20   Additional Information  Jupiter MOID = 1.74345 au   T_jup = 3.188  Orbit Covariance (6×6)   e q tp node peri i e 1.513927010907221E-15 -4.571480212343841E-15 -1.408663231077752E-13 -4.428253360006769E-16 -3.160454666939974E-14 2.422807116773077E-16 q -4.571480212343841E-15 1.386971356798959E-14 4.144324708916967E-13 1.455843056263312E-15 8.786771718065267E-14 -6.755100967260104E-16 tp -1.408663231077752E-13 4.144324708916967E-13 1.378407893017424E-9 -5.516344907006834E-12 2.71367809873428E-10 1.018051228045058E-12 node -4.428253360006769E-16 1.455843056263312E-15 -5.516344907006834E-12 4.167657098617066E-10 -4.108494658172988E-10 -6.268410973070579E-12 peri -3.160454666939974E-14 8.786771718065267E-14 2.71367809873428E-10 -4.108494658172988E-10 4.651032512436692E-10 6.291755406343989E-12 i 2.422807116773077E-16 -6.755100967260104E-16 1.018051228045058E-12 -6.268410973070579E-12 6.291755406343989E-12 2.09351663788606E-11 [ 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 9.3   n/a MPO435704   diameter diameter 88.692 km 0.422 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 7.50 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.] [Stanzel, R.; Schober, H.J. (1980) Astron. Astrophys. Suppl. Ser. 39, 3-5.] [Colazo, L.M.; Fornari, C.; Santucho, M.; Mottino, A.; et al. (2020) Minor Planet Bull. 47, 337-339.] geometric albedo albedo 0.047   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   952 Caia (A916 US)          Discovered 1916-Oct-27 by Neujmin, G. at Simeis Discovered at Simeis during the First World War while Simeis was not in communication with the Rechen-Institut for long periods of time were given provisional designations containing the Greek letter SIGMA. These are here abbreviated S. Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A916 US = 1973 WH = A908 EB = A919 GB = A921 RA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 10:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin