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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 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 JED
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  
   fit RMS      .88913  
   data 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 mag 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 mag 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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