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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.


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Orbital Elements at Epoch 2450158.5 (1996-Mar-16.0) TDB
Reference: JPL 72 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9998986702212276 9.2685e-07  
a 2272.079439771763 20.789 au
q .2302293069854339 7.6629e-07 au
i 124.9226625944912 5.013e-05 deg
node 188.0452284985425 9.9117e-06 deg
peri 130.1740835084622 0.00013771 deg
M 359.9995777871475 5.7949e-06 deg
tp 2450204.894088137433
(1996-May-01.39408814)
1.4391e-05 TDB
period 39557942.46665863
108303.74
5.4293e+05
1486
d
yr
n 9.100574437192371E-6 1.249e-07 deg/d
Q 4543.92865023654 41.577 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.303845253882055E-8 4.706E-10
A2 [EST] 3.621508865039903E-10 8.391E-11
  Orbit Determination Parameters
   # obs. used (total)      978  
   data-arc span      306 days  
   first obs. used      1996-01-01  
   last obs. used      1996-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   norm. resid. RMS      .88913  
   source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-13 19:42:31  

Additional Information
 Earth MOID = .100969 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   0.8 72 from 45 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 11.   n/a 72 autocmod 2.5c
comet nuclear magnitude M2 11.1   0.001 72 from 5 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 72 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 72 autocmod 2.5c
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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