+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   846 Lipperta (1916 AT) Classification: Main-belt Asteroid          SPK-ID: 2000846 [ 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 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1833204496524868 5.7694e-08   a 3.125780519454568 1.6393e-08 AU q 2.552761029113173 1.7902e-07 AU i .2641047153094536 5.4899e-06 deg node 261.5475722609223 0.0013418 deg peri 129.1885575428768 0.0013415 deg M 173.6437254077322 1.5854e-05 deg tp 2455426.872703536028 (2010-Aug-18.37270354) 8.5934e-05 JED period 2018.534363415715 5.53 1.5879e-05 4.347e-08 d yr n .1783472238693112 1.403e-09 deg/d Q 3.698800009795963 1.9398e-08 AU   Orbit Determination Parameters    # obs. used (total)      1528      data-arc span      35221 days (96.43 yr)      first obs. used      1916-11-16      last obs. used      2013-04-22      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .56141      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:39:20   Additional Information  Earth MOID = 1.55764 AU   T_jup = 3.189  [ 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 10.26 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9 diameter diameter 52.41 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9 rotation period rot_per 1641. h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Buchheim, R.K. (2011) Minor Planet Bul. 38, 151-153.] geometric albedo albedo 0.0506   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9 B-V BV .610 mag .040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=5.20 deg. U-B UB .390 mag .060 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=5.20 deg. Tholen spectral type spec_T CBU:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 846 Lipperta (1916 AT)          Discovered 1916-Nov-26 by Gyllenberg, K. at Bergedorf Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1916 AT = 1933 XF = 1943 QF = 1949 UB1 = A912 AD  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-Jun-19 20:04 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin