+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   1337 Gerarda (1934 RA1) Classification: Main-belt Asteroid          SPK-ID: 2001337 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09869250773898351 5.9003e-08   a 2.911321168811288 1.8901e-08 AU q 2.623995581827713 1.7328e-07 AU i 17.99238940272746 6.8176e-06 deg node 160.3480413455584 1.9102e-05 deg peri 199.7131715263675 3.8358e-05 deg M 302.6950456720465 3.653e-05 deg tp 2456689.317346888671 (2014-Jan-31.81734689) 0.0001851 JED period 1814.402368857706 4.97 1.7669e-05 4.838e-08 d yr n .1984124393679255 1.9322e-09 deg/d Q 3.198646755794863 2.0767e-08 AU   Orbit Determination Parameters    # obs. used (total)      1352      data-arc span      28712 days (78.61 yr)      first obs. used      1934-09-09      last obs. used      2013-04-19      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .52259      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:43:37   Additional Information  Earth MOID = 1.62351 AU   T_jup = 3.203  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.06 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 30 diameter diameter 38.86 km 3.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 30 rotation period rot_per 12.52 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: [Binzel, R.P. (1987) Icarus 72, 135-208.] geometric albedo albedo 0.0441   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 30 1337 Gerarda (1934 RA1)          Discovered 1934-Sep-09 by Van Gent, H. at Johannesburg (LS) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1934 RA1 = 1942 EE1  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 17:55 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin