Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
C/1998 G1 (LINEAR)
Classification: Halley-type Comet*          SPK-ID: 1000214
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2450924.5 (1998-Apr-21.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8236926083121225 7.6351e-05  
a 12.10033562322811 0.0061443 au
q 2.133378612279255 0.00023494 au
i 109.7147269708957 0.0018438 deg
node 341.3836647836291 0.00085115 deg
peri 236.3223182650248 0.010028 deg
M 355.0914903587872 0.0040305 deg
tp 2451134.124335551667
(1998-Nov-16.62433555)
0.013128 TDB
period 15374.27168625359
42.09
11.71
0.03206
d
yr
n .02341574335009849 1.7835e-05 deg/d
Q 22.06729263417696 0.011205 au
  Orbit Determination Parameters
   # obs. used (total)      161  
   data-arc span      76 days  
   first obs. used      1998-04-02  
   last obs. used      1998-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      5  
   norm. resid. RMS      .61202  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:29:53  

Additional Information
 Earth MOID = 1.43133 au 
 Jupiter MOID = 1.11107 au 
 T_jup = -0.153 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 13.8   0.6 19 2 parameter fit from 14 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a 19 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1998.9   C/1998 G1       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-18 21:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin