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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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Orbital Elements at Epoch 2457333.5 (2015-Nov-07.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .572069517862926 8.2387e-08  
a 4.517561189737063 8.3586e-08 au
q 1.933202138007915 4.0338e-07 au
i 4.850458802445996 6.2241e-06 deg
node 233.0730564957821 0.00013125 deg
peri 140.9935558775509 0.00012951 deg
M 243.6884491159225 3.9474e-06 deg
tp 2458466.617216653027
(2018-Dec-14.11721665)
6.1643e-05 TDB
period 3507.151223541397
9.60
9.7336e-05
2.665e-07
d
yr
n .1026474129725392 2.8488e-09 deg/d
Q 7.101920241466211 1.314e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1189  
   data-arc span      11112 days (30.42 yr)  
   first obs. used      1990-09-16  
   last obs. used      2021-02-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42509  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 23:13:46  

Additional Information
 Earth MOID = .936689 au 
 Jupiter MOID = .0778173 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 39 2 parameter fit from 579 observations, autocmod 2.9b
comet total magnitude slope K1 4.5   n/a 39 autocmod 2.9b
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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