+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1741786323213568 1.9797e-08   a 3.142235024364769 1.1265e-08 au q 2.594924825388648 6.6008e-08 au i 8.54860279790819 6.7344e-07 deg node 237.6132278688016 4.8968e-06 deg peri 133.3928647090935 5.99e-06 deg M 263.8432084005489 5.897e-06 deg tp 2459939.917834937180 (2022-Dec-26.41783494) 3.4911e-05 TDB period 2034.494052092536 5.57 1.0941e-05 2.995e-08 d yr n .1769481702980304 9.5157e-10 deg/d Q 3.689545223340889 1.3227e-08 au   Orbit Determination Parameters    # obs. used (total)      3462      data-arc span      42249 days (115.67 yr)      first obs. used      1905-10-24      last obs. used      2021-06-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41504      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 12:09:30   Additional Information  Earth MOID = 1.604 au   Jupiter MOID = 1.84838 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 10.41   n/a MPCxxxxx   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. 2020-October); 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 ] 2021-Jul-29 23:08 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin