+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   134340 Pluto (1930 BM) Classification: TransNeptunian Object          SPK-ID: 2134340 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2454000.5 (2006-Sep-22.0) TDB Reference: JPL 0 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.250248713478499 n/a   a 39.4450697257358 n/a au q 29.5739917738007 n/a au i 17.089000919562 n/a deg node 110.3769579554089 n/a deg peri 112.5971416774872 n/a deg M 25.24718971218841 n/a deg tp 2447654.529313563835 (1989-May-08.02931356) n/a TDB period 90487.27692706819 247.74 n/a n/a d yr n .003978459870000909 n/a deg/d Q 49.31614767767086 n/a au   Orbit Determination Parameters    # obs. used (total)      4379      data-arc span      33102 days (90.63 yr)      first obs. used      1914-01-23      last obs. used      2004-09-09      planetary ephem.      DE413      source      ORB      producer      E.M. Standish   Additional Information  Earth MOID = 28.6031 au   T_jup = 5.228  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H -0.4   n/a MPO493769   rotation period rot_per 153.2935 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Walker, M.F.; Hardie, R. (1955) Pub. Ast. Soc. Pacific 67, 224.] [Tholen, D.J.; Buie, M.W. (1997) in Pluto and Charon (S.A. Stern and D.J. Tholen, eds.) pp 193-219. Univ. Arizon Press, Tucson.] 134340 Pluto (1930 BM)          Discovered 1930-Jan-23 by Tombaugh, C. W. at Flagstaff Reference: 20060907/Numbers.arc Last Updated: 2006-09-12 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2021-Apr-18 12:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin