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JPL Small-Body Database Browser
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128P/Shoemaker-Holt 1-A
Classification: Jupiter-family Comet          SPK-ID: 1000285
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3341244560473043 0.0083502  
a 4.557339457149967 0.036511 au
q 3.034620890006818 0.013846 au
i 4.353888335077986 0.00656 deg
node 214.4009006383635 0.07381 deg
peri 210.5667859053697 0.011262 deg
M 331.6649023649881 7.537 deg
tp 2457880.196935076947
(2017-May-06.69693508)
77.759 TDB
period 3553.575072325974
9.73
42.704
0.1169
d
yr
n .1013064287859167 0.0012174 deg/d
Q 6.080058024293117 0.04871 au
  Orbit Determination Parameters
   # obs. used (total)      15  
   data-arc span      79 days  
   first obs. used      1996-09-16  
   last obs. used      1996-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      8  
   norm. resid. RMS      .48708  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2016-Aug-17 09:03:56  

Additional Information
 Earth MOID = 2.04761 au 
 Jupiter MOID = .178964 au 
 T_jup = 2.901 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 8.5   n/a ICQ 1996 Handbook  
comet total magnitude slope K1 10   n/a ICQ 1996 Handbook  
comet nuclear magnitude M2 14.   n/a ICQ 1996 Handbook  
comet nuclear magnitude slope K2 5   n/a ICQ 1996 Handbook  
comet nuclear phase coefficient PC 0.03   n/a ICQ 1996 Handbook  
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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