+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08225327308393629 1.5587e-08   a 2.48826099675179 6.1951e-09 au q 2.283593385481858 4.0476e-08 au i 3.923086380845276 7.7455e-07 deg node 213.919814319679 1.0178e-05 deg peri 18.97611709730558 1.2734e-05 deg M 325.5507430972661 8.6625e-06 deg tp 2459533.689123849381 (2021-Nov-15.18912385) 3.4658e-05 TDB period 1433.647312777235 3.93 5.3541e-06 1.466e-08 d yr n .2511077841750456 9.3778e-10 deg/d Q 2.692928608021723 6.7046e-09 au   Orbit Determination Parameters    # obs. used (total)      3768      data-arc span      33911 days (92.84 yr)      first obs. used      1928-08-17      last obs. used      2021-06-21      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .40866      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 12:09:33   Additional Information  Earth MOID = 1.27346 au   Jupiter MOID = 2.28875 au   T_jup = 3.466  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.20   n/a MPO614063   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 Alternate Designations  1932 PE = 1928 QA = 1935 KL = 1964 VO = 1964 WA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-29 22:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin