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C/2020 U4 (PANSTARRS)
Classification: Hyperbolic Comet          SPK-ID: 1003742
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459187.5 (2020-Dec-04.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.002683160206482 1.939e-05  
a -1995.318664129997 14.413 au
q 5.353759638844574 3.8648e-05 au
i 167.0374142389858 0.0001089 deg
node 120.0210791280117 0.00020616 deg
peri 69.51651388228122 0.00072822 deg
M -.005414902125642608 5.8636e-05 deg
tp 2459677.171620483501
(2022-Apr-07.67162048)
0.0048763 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.105823147417844E-5 1.1982e-07 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      182  
   data-arc span      673 days (1.84 yr)  
   first obs. used      2019-11-09  
   last obs. used      2021-09-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .39961  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Sep-20 00:12:50  

Additional Information
 Earth MOID = 4.39132 au 
 Jupiter MOID = 1.03147 au 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 3.759730064982201E-10 3.158534636195869E-10 -6.315992949909624E-8 3.266109235297501E-10 -5.628652365241033E-9 3.112695256501779E-11
q 3.158534636195869E-10 1.493659014075754E-9 -1.674649994950978E-7 1.852532826590397E-10 -2.660754255427357E-8 -1.858376763390245E-10
tp -6.315992949909624E-8 -1.674649994950978E-7 2.377823315015778E-5 -3.808688543088307E-8 3.183302727115016E-6 1.498146451299791E-8
node 3.266109235297501E-10 1.852532826590397E-10 -3.808688543088307E-8 4.250208392783658E-8 3.847863420096893E-8 2.005339515495031E-8
peri -5.628652365241033E-9 -2.660754255427357E-8 3.183302727115016E-6 3.847863420096893E-8 5.303051161928887E-7 2.284777500983319E-8
i 3.112695256501779E-11 -1.858376763390245E-10 1.498146451299791E-8 2.005339515495031E-8 2.284777500983319E-8 1.18600871908658E-8

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 6.9   0.5 8 from 177 observations, assumed slope, autocmod 2.9e
comet total magnitude slope K1 10.75   n/a 8 autocmod 2.9e
comet nuclear magnitude M2 11.9   0.4 8 from 3 observations, autocmod 2.9e
comet nuclear magnitude slope K2 5.   n/a 8 autocmod 2.9e
comet nuclear phase coefficient PC 0.03   n/a 8 autocmod 2.9e

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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