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137P/Shoemaker-Levy 2
Classification: Jupiter-family Comet          SPK-ID: 1000126
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2457320.5 (2015-Oct-25.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5720767979726137 8.2561e-08  
a 4.51748651785274 8.3617e-08 au
q 1.933137295835092 4.0417e-07 au
i 4.850499244172441 6.242e-06 deg
node 233.0729149327298 0.00013133 deg
peri 140.9955115870911 0.00012958 deg
M 242.3503575148533 3.9285e-06 deg
tp 2458466.624603634097
(2018-Dec-14.12460363)
6.163e-05 TDB
period 3507.064268047956
9.60
9.7372e-05
2.666e-07
d
yr
n .1026499580517745 2.85e-09 deg/d
Q 7.101835739870388 1.3145e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1181  
   data-arc span      10754 days (29.44 yr)  
   first obs. used      1990-09-16  
   last obs. used      2020-02-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42643  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Mar-19 18:45:28  

Additional Information
 Earth MOID = .93656 au 
 Jupiter MOID = .0778273 au 
 T_jup = 2.675 
[ 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 15.4   0.5 38 2 parameter fit from 571 observations, autocmod 2.8
comet total magnitude slope K1 4.5   n/a 38 autocmod 2.8
diameter diameter 5.8 km n/a DASTCOM value unverified
rotation period rot_per 7.7 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Kokotankekova, R.; Snodgrass, C.; Lacerda, P.; Green S.F.; et al. (2017) Mon. Not. Royal Ast. Soc. 471, 2974-3007.]

137P/Shoemaker-Levy 2          Discovered 1990-Oct-25 by Shoemaker, Carolyn S. at Palomar Mountain Observatory, California
discovered on plate/photo taken on discovery date as well as 11/13,15
Reference: comet.disLast Updated: 2006-10-18

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1999.7   137P/1998 K6       
 1990.1   137P/1990 UL3   1990 XVI   1990p 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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