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29P/Schwassmann-Wachmann 1
Classification: Jupiter-family Comet          SPK-ID: 1000079
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457380.5 (2015-Dec-24.0) TDB
Reference: JPL K043/68 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04159566771213193 1.5019e-08  
a 6.012902722853091 5.0973e-08 au
q 5.76279201920792 8.2873e-08 au
i 9.377379824125152 2.0692e-06 deg
node 312.4067055894263 1.2282e-05 deg
peri 49.49588898286991 3.3768e-05 deg
M 280.2031403958263 3.3134e-05 deg
tp 2458574.235180075825
(2019-Mar-31.73518008)
0.00050437 JED
period 5385.483425776567
14.74
6.8481e-05
1.875e-07
d
yr
n .0668463667118406 8.5001e-10 deg/d
Q 6.263013426498261 5.3093e-08 au
  Orbit Determination Parameters
   # obs. used (total)      21177  
   data-arc span      41521 days (113.68 yr)  
   first obs. used      1902-03-04  
   last obs. used      2015-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .77432  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2015-Dec-14 12:53:41  

Additional Information
 Earth MOID = 4.76757 au 
 T_jup = 2.985 
[ 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
comet total magnitude M1 5.5 mag 1. K043/68 from 2595 observations, assumed slope, autocmod 2.6
comet total magnitude slope K1 7.   n/a K043/68 autocmod 2.6
diameter diameter 30.8 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  

29P/Schwassmann-Wachmann 1          Discovered 1927-Nov-15 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1930-Jul-13 12:07 00:05 Jupiter 1.9503947859159 1.95039362385995 1.95039594797123 2.88136276690341 2.7264787175796 2426171.005000757 4.57526759932077 13.3755679854516 4.72188920815053 88.0802860836045 2974979.2456263 T K043/68 CATAB v2.0c-linF95 2015-Dec-14 13:02:04 2015-Dec-14 13:02
1974-May-21 21:32 < 00:01 Jupiter 1.00280398274752 1.00280297407724 1.00280499141823 2.80991321341865 2.49124547696288 2442189.397191667 0.39866788062393 4.79654907542169 0.908025087147391 -30.8551645440205 4121992.50477173 T K043/68 CATAB v2.0c-linF95 2015-Dec-14 13:02:04 2015-Dec-14 13:02
2037-Oct-11 14:26 < 00:01 Jupiter 0.902228479437305 0.902227874658411 0.902229084218324 2.52760529897719 2.12395043505674 2465343.101045725 0.378753024853416 4.35516876724993 1.3222397053865 -64.0532925430139 3888551.10826211 T K043/68 CATAB v2.0c-linF95 2015-Dec-14 13:02:04 2015-Dec-14 13:02
2084-May-18 16:15 00:08 Jupiter 1.47453241784554 1.47452298209559 1.47454185368513 2.08377398908589 1.78696523029055 2482364.176954059 8.27465996235711 34.3485706913525 3.41834611931 -46.6362153287322 1629946.82709356 T K043/68 CATAB v2.0c-linF95 2015-Dec-14 13:02:04 2015-Dec-14 13:02
2126-Jan-22 11:57 00:13 Jupiter 1.60497794014884 1.60497103314452 1.60498484806838 2.5826864767888 2.36955167905554 2497586.997881300 12.8250525974635 58.4540568629743 7.87393051724861 -86.1707734722869 1311616.11476782 T K043/68 CATAB v2.0c-linF95 2015-Dec-14 13:02:04 2015-Dec-14 13:02
2167-Jul-31 15:14 00:07 Jupiter 1.41644508348101 1.41643340661015 1.41645676068404 2.32037899153604 2.04650314089193 2512752.134428972 7.11498607836876 50.7044931198439 2.9004652418376 -58.7436489761895 2412810.42169279 T K043/68 CATAB v2.0c-linF95 2015-Dec-14 13:02:04 2015-Dec-14 13:02

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1989.8       1989 XV   
 1975.0       1974 II   
 1960.3       1957 IV   
 1945.5       1941 VI   
 1930.8   29P/1927 V1   1925 II   1927i 
 1901.3   29P/1902 E1   1908 IV   
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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