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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 61 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9972785193310819 2.073e-06  
a 382.9282749960732 0.29181 au
q 1.042131897983962 4.4195e-07 au
i 6.348647665063202 1.2735e-05 deg
node 235.2217456952734 8.9384e-05 deg
peri 68.19225497640542 9.2805e-05 deg
M 359.9986920742351 1.4997e-06 deg
tp 2457883.443863960354
(2017-May-09.94386396)
4.2754e-05 TDB
period 2736998.629191509
7493.49
3128.5
8.565
d
yr
n .0001315309390952606 1.5035e-07 deg/d
Q 764.8144180941624 0.58282 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 5.582587162386534E-9 3.642E-10
A2 [EST] -3.475132085792241E-9 1.758E-10
A3 [EST] -4.67988751217321E-10 6.012E-11
  Orbit Determination Parameters
   # obs. used (total)      2821  
   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      .54007  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Apr-06 08:42:32  

Additional Information
 Earth MOID = .101706 au 
 Jupiter MOID = .0790459 au 
 T_jup = 1.271 
[ hide covariance matrix ]
Orbit Covariance (9×9)
  e q tp node peri i A1 A2 A3
e 4.29733511424174E-12 6.881453171987451E-13 -7.391760160917016E-11 7.616244716105789E-12 -5.176939214269127E-11 1.674099239000624E-12 -7.408005253935123E-16 -2.423842903069056E-17 1.849289661090976E-18
q 6.881453171987451E-13 1.953161459913487E-13 -1.31348072092077E-11 2.189062567494806E-12 -9.287285209434598E-12 3.605404415308757E-14 -1.367522153957964E-16 -2.288153584327767E-17 -8.413942927823795E-19
tp -7.391760160917016E-11 -1.31348072092077E-11 1.827893542291004E-9 -1.601324989117533E-10 1.086614660474198E-9 -2.579614529300619E-11 1.305380756426331E-14 2.571817562781141E-15 8.740548342606766E-18
node 7.616244716105789E-12 2.189062567494806E-12 -1.601324989117533E-10 7.989475540495698E-9 -8.021627181017314E-9 -7.454382752976825E-10 -1.504400196615996E-15 -4.103940829984631E-16 -4.106820036976958E-15
peri -5.176939214269127E-11 -9.287285209434598E-12 1.086614660474198E-9 -8.021627181017314E-9 8.612780932910243E-9 7.253359858934806E-10 9.242834705278758E-15 1.857379919058843E-15 4.0862020211475E-15
i 1.674099239000624E-12 3.605404415308757E-14 -2.579614529300619E-11 -7.454382752976825E-10 7.253359858934806E-10 1.621784399645906E-10 -2.364666650791657E-16 9.802200672652291E-17 4.167674760355609E-16
A1 -7.408005253935123E-16 -1.367522153957964E-16 1.305380756426331E-14 -1.504400196615996E-15 9.242834705278758E-15 -2.364666650791657E-16 1.326345693017806E-19 9.133165240845524E-21 -5.879863721394225E-23
A2 -2.423842903069056E-17 -2.288153584327767E-17 2.571817562781141E-15 -4.103940829984631E-16 1.857379919058843E-15 9.802200672652291E-17 9.133165240845524E-21 3.08947978304677E-20 8.546393596962404E-22
A3 1.849289661090976E-18 -8.413942927823795E-19 8.740548342606766E-18 -4.106820036976958E-15 4.0862020211475E-15 4.167674760355609E-16 -5.879863721394225E-23 8.546393596962404E-22 3.614328490915239E-21

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 10.0   1. 61 2 parameter fit from 614 observations, autocmod 2.8
comet total magnitude slope K1 7.   n/a 61 autocmod 2.8

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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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