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C/1999 G1 (LINEAR)
Classification: Halley-type Comet*          SPK-ID: 1000266
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2451280.5 (1999-Apr-12.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8567729326684609 0.0021836  
a 28.26669821096978 0.44761 au
q 4.048556287902865 0.0025307 au
i 76.56819680473664 0.054324 deg
node 23.46205703098434 0.0046845 deg
peri 136.1254239225012 0.053968 deg
M 1.661583486109658 0.041098 deg
tp 2451027.144278335639
(1998-Aug-01.64427834)
0.27524 TDB
period 54892.25221702197
150.29
1303.8
3.57
d
yr
n .006558302592079921 0.00015578 deg/d
Q 52.48484013403669 0.8311 au
  Orbit Determination Parameters
   # obs. used (total)      76  
   data-arc span      51 days  
   first obs. used      1999-03-23  
   last obs. used      1999-05-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      6  
   norm. resid. RMS      1.0625  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:29:57  

Additional Information
 Earth MOID = 3.26265 au 
 Jupiter MOID = .807578 au 
 T_jup = 0.742 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 8.   n/a ICQ 2000 Handbook  
comet total magnitude slope K1 10.0   n/a ICQ 2000 Handbook  
comet nuclear magnitude M2 12.5   n/a ICQ 2000 Handbook  
comet nuclear magnitude slope K2 5.0   n/a ICQ 2000 Handbook  
comet nuclear phase coefficient PC 0.03   n/a ICQ 2000 Handbook  

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1998.6   C/1999 G1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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