+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1257 Mora (1932 PE) Classification: Main-belt Asteroid          SPK-ID: 2001257 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08237408157284284 3.3505e-08   a 2.488643798995738 6.8733e-09 au q 2.283644051691513 8.5365e-08 au i 3.922710326051784 3.4771e-06 deg node 213.9264417678413 4.6539e-05 deg peri 18.89960170302705 5.1764e-05 deg M 276.4165907098788 2.4888e-05 deg tp 2459533.435509848464 (2021-Nov-14.93550985) 9.9553e-05 TDB period 1433.978161017813 3.93 5.9407e-06 1.626e-08 d yr n .2510498484471188 1.0401e-09 deg/d Q 2.693643546299962 7.4395e-09 au   Orbit Determination Parameters    # obs. used (total)      3359      data-arc span      33760 days (92.43 yr)      first obs. used      1928-08-17      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42412      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:53:52   Additional Information  Earth MOID = 1.2718 au   Jupiter MOID = 2.2891 au   T_jup = 3.466  [ show covariance matrix ] [ 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 12.19   n/a E2021B10   diameter diameter 21.392 km 1.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 5.2948 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Binzel, R.P. (1987) Icarus 72, 135-208.] [Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.051   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   B-V BV 0.630   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.13 deg. U-B UB 0.320   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.13 deg. 1257 Mora (1932 PE)          Discovered 1932-Aug-08 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1932 PE = 1928 QA = 1935 KL = 1964 VO = 1964 WA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-09 05:21 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin