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

[ show orbit diagram ]
Orbital Elements at Epoch 2457872.5 (2017-Apr-29.0) TDB
Reference: JPL 60 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9972795666784465 2.0689e-06  
a 383.0757657691119 0.29146 au
q 1.042132077877905 4.4486e-07 au
i 6.348643579783893 1.2695e-05 deg
node 235.2217941257971 9.014e-05 deg
peri 68.19219461025845 9.3976e-05 deg
M 359.9985613769383 1.6467e-06 deg
tp 2457883.443845711556
(2017-May-09.94384571)
4.3787e-05 TDB
period 2738580.07774961
7497.82
3125.4
8.557
d
yr
n .0001314549838892514 1.5002e-07 deg/d
Q 765.1093994603458 0.58213 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 5.434965908277873E-9 3.642E-10
A2 [EST] -3.457151948532431E-9 1.759E-10
A3 [EST] -5.182881256852354E-10 6.015E-11
  Orbit Determination Parameters
   # obs. used (total)      2812  
   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      .53823  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-15 08:29:46  

Additional Information
 Earth MOID = .101632 au 
 Jupiter MOID = .0790442 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 8.9   1. 60 from 601 observations, assumed slope, autocmod 2.6q
comet total magnitude slope K1 9.   n/a 60 autocmod 2.6q
comet nuclear magnitude M2 12.8   1. 60 from 1939 observations, autocmod 2.6q
comet nuclear magnitude slope K2 5.   n/a 60 autocmod 2.6q
comet nuclear phase coefficient PC 0.03   n/a 60 autocmod 2.6q

[ show close-approach data ]
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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