+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   99 Dike Classification: Main-belt Asteroid          SPK-ID: 2000099 [ 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 56 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1965789949194077 7.2062e-08   a 2.663661871302196 1.1915e-08 AU q 2.140041897836462 1.9328e-07 AU i 13.85311554000628 8.0243e-06 deg node 41.62673260224862 2.8866e-05 deg peri 195.5199519539977 3.354e-05 deg M 106.1440231199433 1.8955e-05 deg tp 2455932.322959839338 (2012-Jan-05.82295984) 8.2691e-05 JED period 1587.877767430985 4.35 1.0654e-05 2.917e-08 d yr n .2267177029516833 1.5212e-09 deg/d Q 3.18728184476793 1.4257e-08 AU   Orbit Determination Parameters    # obs. used (total)      1081      data-arc span      35724 days (97.81 yr)      first obs. used      1915-01-20      last obs. used      2012-11-10      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .54087      data source      ORB      producer      Otto Matic      solution date      2012-Dec-03 14:18:09   Additional Information  Earth MOID = 1.1324 AU   T_jup = 3.316  [ 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 9.43 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3 diameter diameter 69.04 km 2.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3 rotation period rot_per 18.127 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Pilcher, F. (2011) Minor Planet Bul. 38, 183-185.] geometric albedo albedo 0.0627   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3 B-V BV .703 mag .032 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=3.84, mean=7.96, max.=15.22) deg. U-B UB .322 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=3.84, mean=7.96, max.=15.22) deg. Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices SMASSII spectral type spec_B Xk   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) 99 Dike          Discovered 1868-May-28 by Borrelly, A. at Marseille Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1935 UC = 1935 YL = 1939 UT = 1948 UE = 1948 WC = 1961 XJ = 1974 VB = A915 BA  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-19 06:27 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin