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C/2003 U1 (LINEAR)
Classification: Halley-type Comet*          SPK-ID: 1000461
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2452948.5 (2003-Nov-05.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9215850089213874 0.00024127  
a 22.90017203583503 0.070771 au
q 1.795716785888698 2.4497e-05 au
i 164.4745303089487 0.00022093 deg
node 322.7631070269966 0.00046842 deg
peri 278.3837925577807 0.00078102 deg
M .01440928074424134 6.5426e-05 deg
tp 2452946.897875187172
(2003-Nov-03.39787519)
0.00077368 TDB
period 40027.32286610375
109.59
185.55
0.508
d
yr
n .008993856551542147 4.1692e-05 deg/d
Q 44.00462728578137 0.13599 au
  Orbit Determination Parameters
   # obs. used (total)      188  
   data-arc span      63 days  
   first obs. used      2003-10-19  
   last obs. used      2003-12-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      5  
   norm. resid. RMS      .6486  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:30:34  

Additional Information
 Earth MOID = .879098 au 
 Jupiter MOID = .257637 au 
 T_jup = -1.342 
[ 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 15.2   0.7 15 from 129 observations, assumed slope, autocmod 2.9c
comet total magnitude slope K1 10.   n/a 15 autocmod 2.9c
comet nuclear magnitude M2 17.2   0.5 15 from 40 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 15 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 15 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2003.8   C/2003 U1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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