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C/1996 B2 (Hyakutake)
Classification: Comet          SPK-ID: 1000131
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2450161.5 (1996-Mar-19.0) TDB
Reference: JPL 71 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9998990218110119 1.2559e-06  
a 2279.989852531104 28.366 AU
q .2302292462199096 1.018e-06 AU
i 124.922753345951 7.0709e-05 deg
node 188.0452276884765 1.326e-05 deg
peri 130.1740706117353 0.00018536 deg
M 359.9996071424466 7.3317e-06 deg
tp 2450204.894071974447
(1996-May-01.39407197)
1.8347e-05 JED
period 39764708.03088376
108869.84
7.421e+05
2032
d
yr
n 9.053253948712549E-6 1.6895e-07 deg/d
Q 4559.749475815987 56.73 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.337781355782644E-8 6.175E-10
A2 [EST] 2.971512197916961E-10 1.157E-10
  Orbit Determination Parameters
   # obs. used (total)      983  
   # delay obs. used      0  
   # Doppler obs. used      3  
   data-arc span      306 days  
   first obs. used      1996-01-01  
   last obs. used      1996-11-02  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   fit RMS      .74998  
   data source      ORB  
   producer      Otto Matic  
   solution date      2011-Sep-14 21:14:39  

Additional Information
 Earth MOID = .100977 AU 
 T_jup = -0.338 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 7.3 mag 0.9 71 2 parameter fit from 45 observations, autocmod 2.5a
comet total magnitude slope K1 11.   n/a 71 autocmod 2.5a
comet nuclear magnitude M2 11.1 mag 0.001 71 from 5 observations, autocmod 2.5a
comet nuclear magnitude slope K2 5.   n/a 71 autocmod 2.5a
comet nuclear phase coefficient PC 0.03   n/a 71 autocmod 2.5a
diameter diameter 4.2 km n/a DASTCOM value unverified

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1996.3   C/1996 B2       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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