+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   7822 (1991 CS) Classification: Apollo [NEO, PHA]          SPK-ID: 2007822 [ 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 63 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1646366680039065 4.4893e-08   a 1.122725962376543 2.9748e-09 AU q .9378841008493893 4.9767e-08 AU i 37.1208443008498 1.6526e-05 deg node 156.8760076809616 3.755e-06 deg peri 249.4556179117514 2.1644e-05 deg M 303.038620275951 2.8834e-05 deg tp 2456469.252275200576 (2013-Jun-25.75227520) 3.5014e-05 JED period 434.5193039935747 1.19 1.727e-06 4.728e-09 d yr n .8285017413295943 3.2928e-09 deg/d Q 1.307567823903696 3.4646e-09 AU   Orbit Determination Parameters    # obs. used (total)      416      # delay obs. used      0      # Doppler obs. used      4      data-arc span      7020 days (19.22 yr)      first obs. used      1991-01-19      last obs. used      2010-04-09      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .50772      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 15:37:48   Additional Information  Earth MOID = .0226491 AU   T_jup = 5.365  [ 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 17.4 mag n/a PDS3 (MPC 30437)   rotation period rot_per 2.389 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (1998) Icarus 136, 124-153.] [Krugly, Yu.N.; Bel'skaya, I.N.; Shevchenko, V.G.; et al. (2002) Icarus 158, 294-304.] SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 7822 (1991 CS)          Discovered 1991-Feb-13 by McNaught, R. H. at Siding Spring (413) 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-18 21:08 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin