+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1255 Schilowa (1932 NC) Classification: Main-belt Asteroid          SPK-ID: 2001255 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .173858174302075 3.6275e-08   a 3.142531269397342 1.3011e-08 au q 2.596176520212738 1.1297e-07 au i 8.547812653224341 3.7668e-06 deg node 237.6159459410969 2.3901e-05 deg peri 133.4323433840389 2.5824e-05 deg M 193.6959122977517 1.1866e-05 deg tp 2459940.479239755040 (2022-Dec-26.97923975) 7.0508e-05 TDB period 2034.781772277744 5.57 1.2637e-05 3.46e-08 d yr n .1769231496491215 1.0987e-09 deg/d Q 3.688886018581946 1.5273e-08 au   Orbit Determination Parameters    # obs. used (total)      3077      data-arc span      41874 days (114.64 yr)      first obs. used      1905-10-24      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4276      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:28:38   Additional Information  Earth MOID = 1.60602 au   Jupiter MOID = 1.84666 au   T_jup = 3.169  [ 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 10.3   n/a MPO253368   diameter diameter 33.669 km 0.718 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 29.536 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] geometric albedo albedo 0.130   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1255 Schilowa (1932 NC)          Discovered 1932-Jul-08 by Neujmin, G. at Simeis Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1932 NC = 1933 VB = A905 UC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Jul-07 07:21 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin