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[ show orbit diagram ]
Orbital Elements at Epoch 2455162.5 (2009-Nov-27.0) TDB Reference: JPL K193/12 (heliocentric ecliptic J2000)
Element Value Uncertainty (1-sigma) Units e .1923761689172221 1.0502e-07 a 4.239743056068873 7.9608e-08 au q 3.424117529748948 4.4708e-07 au i 4.547250878205253 1.1225e-05 deg node 114.1886363733067 0.00010987 deg peri 18.00595414977927 0.00012944 deg M 325.347676403265 5.094e-05 deg t p 2455469.428766335306 0.00045252 TDB period 3188.656471253812 8.9808e-05 d n .1129002146344239 3.1798e-09 deg/d Q 5.055368582388798 9.4922e-08 au
Additional Model Parameters
Parameter Value Uncertainty (1-sigma) A2 [EST]-5.241041156521413E-8 1.629E-9
Orbit Determination Parameters Additional Information
[ show covariance matrix ] Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 5.2 0.7 K193/12 2 parameter fit from 513 observations, autocmod 2.8
comet total magnitude slope K1 21. n/a K193/12 autocmod 2.8
comet nuclear magnitude M2 14.0 0.6 K193/12 from 277 observations, autocmod 2.8
comet nuclear magnitude slope K2 5. n/a K193/12 autocmod 2.8
comet nuclear phase coefficient PC 0.03 n/a K193/12 autocmod 2.8
diameter diameter 6.2 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264
31P/Schwassmann-Wachmann 2 Discovered 1929-Jan-17 by Schwassmann, A. and Wachmann, A. A. at Hamburg Observatory, Germany discovered on plate/photo taken on discovery date Reference: comet.disLast Updated: 2003-08-29
[ show close-approach data ]
Alternate Designations Perihelion (est.) New-Style Roman Year/ 1993.3 1994 II 1984.6 1981 VI 1986h 1975.8 1974 XIII 1979k 1967.1 1968 II 1967i 1958.4 1955 I 1960j 1949.6 1948 VII 1947l 1940.9 1942 I 1941f 1932.2 31P/1929 B1 1929 I 1929a
