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C/1979 Y1 (Bradfield)
Classification: Comet          SPK-ID: 1000540
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2444263.5 (1980-Jan-25.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9880381363652363 0.00016198  
a 45.58664557893659 0.62144 au
q .5453012379815432 4.9424e-05 au
i 148.6025329128723 0.00049281 deg
node 103.2155346254692 0.0015212 deg
peri 257.6097304634741 0.0088697 deg
M .1101242962403886 0.0022642 deg
tp 2444229.109734641488
(1979-Dec-21.60973464)
0.003874 TDB
period 112422.9252919731
307.80
2298.8
6.294
d
yr
n .003202193850276048 6.5479e-05 deg/d
Q 90.62798991989165 1.2355 au
  Orbit Determination Parameters
   # obs. used (total)      127  
   data-arc span      75 days  
   first obs. used      1979-12-26  
   last obs. used      1980-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      6  
   norm. resid. RMS      .85945  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:29:29  

Additional Information
 Earth MOID = .0671385 au 
 Jupiter MOID = 1.69304 au 
 T_jup = -0.665 
[ 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 8.5   1. 9 2 parameter fit from 10 observations, autocmod 2.9c
comet total magnitude slope K1 14.   n/a 9 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1980.0   C/1979 Y1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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