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132P/Helin-Roman-Alu 2
Classification: Jupiter-family Comet          SPK-ID: 1000133
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2452464.5 (2002-Jul-09.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5307297155941175 1.7893e-07  
a 4.08788875519719 6.9826e-08 au
q 1.918324718770994 7.4401e-07 au
i 5.76803446068485 2.2428e-05 deg
node 178.4306580701276 0.00015104 deg
peri 221.1884228945081 0.00016109 deg
M 203.0099563613329 1.2848e-05 deg
tp 2453780.987195370250
(2006-Feb-14.48719537)		 0.0001237 TDB
period 3018.888200477945
8.27		 7.7349e-05
2.118e-07		 d
yr
n .1192491990736873 3.0554e-09 deg/d
Q 6.257452791623385 1.0688e-07 au
   Orbit Determination Parameters
   # obs. used (total)      245  
   data-arc span      9165 days (25.09 yr)  
   first obs. used      1989-10-26  
   last obs. used      2014-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .79131  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Apr-30 07:16:49  

Additional Information
 Earth MOID = .928698 au 
 Jupiter MOID = .0122543 au 
 T_jup = 2.768 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 14.3   01. 28 2 parameter fit from 110 observations, autocmod 2.8
comet total magnitude slope K1 8.75   n/a 28 autocmod 2.8
comet nuclear magnitude M2 17.0   0.7 28 from 47 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 28 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 28 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year (est.)		  New-Style 
Desig		 Roman
 Numeral 		 Year/
 Letter 
 1997.9   132P/1997 N2       
 1989.6   132P/1989 U1   1989 XVI   1989y 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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