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JPL Small-Body Database Browser
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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 
[ show covariance matrix ]

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2023-Feb-10 15:39 00:12 Jupiter 1.57096812292079 1.57084983083316 1.5710864222679 30.8046397686261 30.7871318354866 2459986.151860119 11.9890910331227 8118.22988546064 1748.98101502122 44.7080255291074 99852.5753388061 T 8 CATAB v2.0g-lin.ifort 2021-Sep-20 00:12:50 2021-Sep-20 00:12
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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