+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   40P/Vaisala 1 Classification: Jupiter-family Comet          SPK-ID: 1000101 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2015-Aug-28.0] K148/7 (default) [epoch=2004-Aug-23.0] K045/7 [epoch=1993-May-13.0] SAO/1993 [epoch=1982-Aug-19.0] SAO/1982 [epoch=1971-Sep-06.0] SAO/1971 [epoch=1960-May-26.0] SAO/1960 [epoch=1949-Nov-20.0] SAO/1949 [epoch=1939-Apr-07.0] SAO/1939 Orbital Elements at Epoch 2457262.5 (2015-Aug-28.0) TDB Reference: JPL K148/7 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6316152020645802 8.4318e-08   a 4.939864962861835 5.1746e-08 au q 1.819771156172117 4.122e-07 au i 11.49264281940788 5.647e-06 deg node 133.8401678570807 5.2173e-05 deg peri 47.28885502172881 5.3735e-05 deg M 25.59861596735432 5.64e-06 deg tp 2456977.342350093810 (2014-Nov-15.84235009) 5.9039e-05 TDB period 4010.246260858229 10.98 6.3012e-05 1.725e-07 d yr n .08977004816730551 1.4105e-09 deg/d Q 8.059958769551553 8.443e-08 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A2 [EST] -1.091448490022975E-10 2.455E-13   Orbit Determination Parameters    # obs. used (total)      1128      data-arc span      27930 days (76.47 yr)      first obs. used      1939-01-18      last obs. used      2015-07-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-BIG16      condition code      0      norm. resid. RMS      .84439      source      ORB      producer      Ryan S. Park      solution date      2015-Aug-18 21:51:16   Additional Information  Earth MOID = .847879 au   Jupiter MOID = .0864788 au   T_jup = 2.534  [ 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 11.7   1. K148/7 2 parameter fit from 360 observations, autocmod 2.6 comet total magnitude slope K1 13.   n/a K148/7 autocmod 2.6 comet nuclear magnitude M2 14.8   0.7 K148/7 from 380 observations, autocmod 2.6 comet nuclear magnitude slope K2 5.   n/a K148/7 autocmod 2.6 comet nuclear phase coefficient PC 0.03   n/a K148/7 autocmod 2.6 diameter diameter 4.2 km n/a Scotti,J (1994) BAAS 26:1375   40P/Vaisala 1          Discovered 1939-Feb-08 by Vaisala, Y. at Turku, Finland discovered on plate/photo taken on discovery date Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1992.9       1993 VIII   1992u   1981.9       1982 V   1981l   1971.0       1971 VII   1970q   1960.0       1960 IV   1959i   1949.0   40P/1949 Y1   1949 V   1949h   1938.0   40P/1939 CB   1939 IV   1939b  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-23 13:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin