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

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2450157.5 (1996-Mar-15.0) TDB
Reference: JPL 73 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9998916470450123 1.0882e-06  
a 2124.755444393889 21.347 au
q .2302235310262354 8.979e-07 au
i 124.9220493922234 6.3816e-05 deg
node 188.045131992156 1.2303e-05 deg
peri 130.1751209780967 0.00016116 deg
M 359.9995230582502 7.1879e-06 deg
tp 2450204.894144996451
(1996-May-01.39414500)
1.6112e-05 TDB
period 35773534.62343365
97942.60
5.3913e+05
1476
d
yr
n 1.006330528390616E-5 1.5166e-07 deg/d
Q 4249.280665256751 42.693 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.687692871249691E-8 5.417E-10
A2 [EST] 6.515068724785845E-10 9.876E-11
  Orbit Determination Parameters
   # obs. used (total)      977  
   data-arc span      306 days  
   first obs. used      1996-01-01  
   last obs. used      1996-11-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .71366  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:29:47  

Additional Information
 Earth MOID = .100967 au 
 Jupiter MOID = 1.99127 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 7.4   0.9 73 2 parameter fit from 45 observations, autocmod 2.9c
comet total magnitude slope K1 10.75   n/a 73 autocmod 2.9c
comet nuclear magnitude M2 11.1   0.001 73 from 5 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 73 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 73 autocmod 2.9c
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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