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

[ hide orbit diagram ]

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 
[ hide covariance matrix ]
Orbit Covariance (8×8)
  e q tp node peri i A1 A2
e 1.184255256001322E-12 9.037504578468229E-13 -1.266140072796055E-11 1.16248361574698E-11 -1.694714390481141E-10 5.596542148857782E-11 -3.60575863406135E-16 -7.863155267057722E-17
q 9.037504578468229E-13 8.06227985450056E-13 -6.122882705786319E-12 9.050656046461416E-12 -1.433320899728827E-10 4.293877008071207E-11 -3.733581993420761E-16 -5.364780228145584E-17
tp -1.266140072796055E-11 -6.122882705786319E-12 2.596070620295051E-10 -1.101695833025204E-10 1.400472777210488E-9 -5.860029897079275E-10 4.592893237002078E-16 1.102197743121143E-15
node 1.16248361574698E-11 9.050656046461416E-12 -1.101695833025204E-10 1.513652589831313E-10 -1.659403636610646E-9 6.895219647767712E-10 -3.902174757316871E-15 -7.289001412464146E-16
peri -1.694714390481141E-10 -1.433320899728827E-10 1.400472777210488E-9 -1.659403636610646E-9 2.597370135624615E-8 -7.964858002703856E-9 6.308013435455213E-14 1.054439807777457E-14
i 5.596542148857782E-11 4.293877008071207E-11 -5.860029897079275E-10 6.895219647767712E-10 -7.964858002703856E-9 4.072418859887674E-9 -1.815158460152123E-14 -3.57854438923198E-15
A1 -3.60575863406135E-16 -3.733581993420761E-16 4.592893237002078E-16 -3.902174757316871E-15 6.308013435455213E-14 -1.815158460152123E-14 2.934263567140197E-19 1.983229224375274E-21
A2 -7.863155267057722E-17 -5.364780228145584E-17 1.102197743121143E-15 -7.289001412464146E-16 1.054439807777457E-14 -3.57854438923198E-15 1.983229224375274E-21 9.754143663327213E-21

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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