+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   2195 Tengstrom (1941 SP1) Classification: Main-belt Asteroid          SPK-ID: 2002195 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ 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 .1053721017187503 6.3306e-08   a 2.221988144000569 9.6979e-09 AU q 1.987852583273084 1.3969e-07 AU i 4.575874854881674 7.7926e-06 deg node 101.0032507171657 7.899e-05 deg peri 295.2802021314693 8.8601e-05 deg M 201.8085717493121 4.1219e-05 deg tp 2456932.107964932071 (2014-Oct-01.60796493) 0.00013936 JED period 1209.792904026793 3.31 7.9203e-06 2.168e-08 d yr n .2975715916350153 1.9481e-09 deg/d Q 2.456123704728054 1.072e-08 AU   Orbit Determination Parameters    # obs. used (total)      1037      data-arc span      29780 days (81.53 yr)      first obs. used      1931-10-10      last obs. used      2013-04-22      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .54267      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:50:13   Additional Information  Earth MOID = .999402 AU   T_jup = 3.637  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.6 mag n/a PDS3 (MPC 17264)   rotation period rot_per 2.82112 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Higgins, D.; Pravec, P.; Kusnirak, P.; Galad, A.; et al. (2006) Minor Planet Bul. 33, 89-91.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/astero id/lightcurves.htm] [Pravec, P.; Wolf, M.; Sarounova, L. (2011) http://www.asu.cas.cz/~ppravec/neo.htm] [Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] 2195 Tengstrom (1941 SP1)          Discovered 1941-Sep-27 by Oterma, L. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1941 SP1 = 1931 TC3 = 1934 PQ = 1936 DF = 1943 GT = 1944 QD = 1951 VA = 1973 GC1 = 1974 RC2 = 1976 GO4  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-19 13:09 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin