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C/2015 ER61 (PANSTARRS)
Classification: Comet          SPK-ID: 1003443
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2457873.5 (2017-Apr-30.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9972785996689297 2.073e-06  
a 382.9395865643687 0.29182 au
q 1.042131917656184 4.4194e-07 au
i 6.348648579698971 1.2735e-05 deg
node 235.2217396762875 8.9384e-05 deg
peri 68.19226006946522 9.2805e-05 deg
M 359.998692132206 1.4997e-06 deg
tp 2457883.443863811719
(2017-May-09.94386381)
4.2754e-05 TDB
period 2737119.905070991
7493.83
3128.7
8.566
d
yr
n .0001315251112430396 1.5034e-07 deg/d
Q 764.8370412110811 0.58284 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 5.56714339626692E-9 3.642E-10
A2 [EST] -3.480456351256637E-9 1.758E-10
A3 [EST] -4.640503954141938E-10 6.012E-11
  Orbit Determination Parameters
   # obs. used (total)      2822  
   data-arc span      1421 days (3.89 yr)  
   first obs. used      2015-01-21  
   last obs. used      2018-12-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .54026  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:07:33  

Additional Information
 Earth MOID = .101706 au 
 Jupiter MOID = .0790459 au 
 T_jup = 1.271 
[ 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 10.4   1. 62 2 parameter fit from 611 observations, autocmod 2.8
comet total magnitude slope K1 6.25   n/a 62 autocmod 2.8

[ 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
2016-Mar-28 04:07 00:02 Jupiter 0.9245054330859 0.924501561319455 0.924509304856813 18.7246293860819 18.6756356223578 2457475.671502651 1.78555675533552 240.406641156074 137.174769841059 46.0591476348783 857186.26971221 T 62 CATAB v2.0f-lin.ifort 2020-Aug-24 22:07:40 2020-Aug-24 22:07

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2017.4   C/2015 ER61       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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