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27P/Crommelin
Classification: Halley-type Comet* [NEO]          SPK-ID: 1000016
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2456364.5 (2013-Mar-13.0) TDB
Reference: JPL K113/4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9189810923126022 0.00017002  
a 9.235960944226864 0.022659 au
q .748287467144728 0.00027109 au
i 28.96687278723059 0.0011605 deg
node 250.6264098390235 0.0041998 deg
peri 196.0253968913816 0.017961 deg
M 20.61577251683614 0.075722 deg
tp 2455777.391090241354
(2011-Aug-03.89109024)
0.0046592 TDB
period 10252.30596333479
28.07
37.729
0.1033
d
yr
n .03511405153996224 0.00012922 deg/d
Q 17.723634421309 0.043483 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -3.653645033749881E-8 1.055E-7
A2 [EST] -1.713114322066723E-9 7.261E-9
A3 [EST] 2.081362723681325E-9 1.936E-9
  Orbit Determination Parameters
   # obs. used (total)      154  
   data-arc span      259 days  
   first obs. used      2011-05-12  
   last obs. used      2012-01-26  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      6  
   norm. resid. RMS      .70281  
   source      ORB  
   producer      Ryan S. Park  
   solution date      2013-Mar-03 19:22:50  

Additional Information
 Earth MOID = .215189 au 
 Jupiter MOID = 1.02145 au 
 T_jup = 1.483 
[ 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 12.8   0.7 K113/4 2 parameter fit from 36 observations, autocmod 2.5b
comet total magnitude slope K1 28.   n/a K113/4 autocmod 2.5b
comet nuclear magnitude M2 16.3   0.6 K113/4 from 50 observations, autocmod 2.5b
comet nuclear magnitude slope K2 5.   n/a K113/4 autocmod 2.5b
comet nuclear phase coefficient PC 0.03   n/a K113/4 autocmod 2.5b

27P/Crommelin          Discovered 1818-Feb-23 by Pons, Jean Louis at Marseilles Observatory, France
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1983.5       1984 IV   1983n 
 1955.4   27P/1956 S1   1956 VI   1956g 
 1927.4   27P/1928 W1   1928 III   1928b 
 1871.2   27P/1873 V1   1873 VII   1873g 
 1815.1   27P/1818 D1   1818 I   
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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