+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   9P/Tempel 1 Classification: Jupiter-family Comet          SPK-ID: 1000093 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2016-Aug-04.0] K224/4 (default) [epoch=2004-Oct-05.0] K052/37 [epoch=1994-Jun-17.0] K007/52 [epoch=1988-Dec-25.0] SAO/1989 [epoch=1983-Jul-05.0] SAO/1983 [epoch=1978-Jan-12.0] SAO/1978 [epoch=1972-Jul-22.0] SAO/1972 [epoch=1967-Jan-30.0] SAO/1967 [epoch=1879-May-31.0] SAO/1879 [epoch=1873-May-22.0] SAO/1873 [epoch=1867-May-14.0] SAO/1867 Orbital Elements at Epoch 2457604.5 (2016-Aug-04.0) TDB Reference: JPL K224/4 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .509590319944669 1.6373e-06   a 3.14541911034839 1.0473e-05 au q 1.542543979545878 6.9506e-07 au i 10.4740346324653 1.4152e-05 deg node 68.74919004623845 6.8183e-05 deg peri 179.20655532 9.6693e-05 deg M .2504200902681015 2.1343e-05 deg tp 2457603.082631177524 (2016-Aug-02.58263118) 0.00011538 TDB period 2037.587222115765 5.58 0.010177 2.786e-05 d yr n .1766795531953659 8.8242e-07 deg/d Q 4.748294241150902 1.581e-05 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] -2.230186836065846E-9 2.592E-10 A2 [EST] -3.4598580134414E-10 2.605E-10 A3 [EST] -2.637965897142096E-10 1.566E-10   Orbit Determination Parameters    # obs. used (total)      1541      data-arc span      1896 days (5.19 yr)      first obs. used      2015-11-11      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      3      norm. resid. RMS      .43921      source      ORB      producer      Davide Farnocchia      solution date      2021-Feb-01 11:04:18   Additional Information  Earth MOID = .528253 au   Jupiter MOID = .298517 au   T_jup = 2.970  [ 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 comet total magnitude M1 12.4   0.8 K224/4 2 parameter fit from 456 observations, autocmod 2.9a comet total magnitude slope K1 10.   n/a K224/4 autocmod 2.9a comet nuclear magnitude M2 14.6   0.6 K224/4 from 1018 observations, autocmod 2.9a comet nuclear magnitude slope K2 5.   n/a K224/4 autocmod 2.9a comet nuclear phase coefficient PC 0.03   n/a K224/4 autocmod 2.9a diameter diameter 6.0 km 0.2 A'Hearn, M.F. et al. (2005) Science 310:258-264   extent extent 7.6x4.9 km n/a A'Hearn, M.F. et al. (2005) Science 310:258-264 preliminary shape model rotation period rot_per 40.7 h n/a A'Hearn, M.F. et al. (2005) Science 310:258-264   geometric albedo albedo 0.05   0.02 Earth, Moon, and Planets, v. 89, Issue 1, p. 117-134 (2002)   9P/Tempel 1          Discovered 1867-Apr-03 by Tempel, William at Marseilles, France Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1994.3       1994 XIX   1993c   1988.7       1989 I   1987e1   1983.1       1983 XI   1982j   1977.5       1978 II   1977i   1972.0   9P/1972 A1   1972 V   1972a   1966.4   9P/1967 L1   1966 VII     1877.1       1879 III   1879b   1871.5   9P/1873 G1   1873 I   1873a   1866.0   9P/1867 G1   1867 II    [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-25 17:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin