+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   1738 Oosterhoff (1930 SP) Classification: Main-belt Asteroid          SPK-ID: 2001738 [ 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 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2034319372393235 5.4925e-08   a 2.183024140889742 5.8889e-09 AU q 1.738927310868332 1.1994e-07 AU i 4.876108431074582 6.1863e-06 deg node 44.17074095337018 6.5411e-05 deg peri 284.1390425170214 6.6606e-05 deg M 228.0860303459666 1.6148e-05 deg tp 2456832.192519665926 (2014-Jun-23.69251967) 5.3843e-05 JED period 1178.111063500859 3.23 4.7671e-06 1.305e-08 d yr n .3055739065298554 1.2365e-09 deg/d Q 2.627120970911152 7.0869e-09 AU   Orbit Determination Parameters    # obs. used (total)      1375      data-arc span      31210 days (85.45 yr)      first obs. used      1927-10-30      last obs. used      2013-04-11      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .52414      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:47:04   Additional Information  Earth MOID = .735677 AU   T_jup = 3.647  [ 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 12.3 mag n/a PDS3 (MPC 17263)   rotation period rot_per 4.4486 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm] SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 1738 Oosterhoff (1930 SP)          Discovered 1930-Sep-16 by Van Gent, H. at Johannesburg (LS) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1930 SP = 1927 UF = 1939 GO = 1942 FD = 1943 TO = 1946 OG = 1949 JE = 1949 KH = 1952 HV = 1952 JJ = 1959 RB1  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-25 16:09 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin