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C/2020 R4 (ATLAS)
Classification: Comet          SPK-ID: 1003720
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459206.5 (2020-Dec-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9894367267262247 8.804e-07  
a 97.37474305821557 0.0081134 au
q 1.028596020887582 1.666e-07 au
i 164.4631492156327 1.7358e-05 deg
node 323.2725413595796 9.5912e-05 deg
peri 46.71209566146389 9.0154e-05 deg
M 359.9292877616376 8.8412e-06 deg
tp 2459275.438209266771
(2021-Mar-01.93820927)
2.6689e-05 TDB
period 350968.3176599052
960.90
43.865
0.1201
d
yr
n .001025733611513181 1.282e-07 deg/d
Q 193.7208900955436 0.016141 au
  Orbit Determination Parameters
   # obs. used (total)      598  
   data-arc span      246 days  
   first obs. used      2020-08-29  
   last obs. used      2021-05-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .79316  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-02 23:42:49  

Additional Information
 Earth MOID = .118615 au 
 Jupiter MOID = .0233106 au 
 T_jup = -1.155 
[ 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 12.9   01. 11 2 parameter fit from 510 observations, autocmod 2.9c
comet total magnitude slope K1 12.25   n/a 11 autocmod 2.9c
comet nuclear magnitude M2 14.9   0.4 11 from 10 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 11 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 11 autocmod 2.9c

[ 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
2021-Apr-23 11:05 < 00:01 Earth 0.463662622048408 0.46366127696183 0.463663967135066 62.8668529745909 62.8667615656105 2459327.961889131 0.0352547723295878 67.7355654961385 34.3672489263488 9.31073300868226 1063010.74442462 T 11 CATAB v2.0g-lin.ifort 2021-May-02 23:42:51 2021-May-02 23:42

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2021.2   C/2020 R4       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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