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C/2015 YG1 (NEOWISE)
Classification: Halley-type Comet*          SPK-ID: 1003431
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457423.5 (2016-Feb-05.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8792362154294353 1.6956e-05  
a 17.1691486910837 0.0026767 au
q 2.073411373790025 4.0868e-05 au
i 57.33603835888664 0.00077214 deg
node 350.5118626793929 0.00024775 deg
peri 102.7917631141584 0.0016309 deg
M 1.787583210025974 0.00043442 deg
tp 2457294.471592938008
(2015-Sep-28.97159294)
0.0014832 TDB
period 25984.93109679755
71.14
6.0767
0.01664
d
yr
n .01385418335953822 3.2399e-06 deg/d
Q 32.26488600837738 0.0050302 au
  Orbit Determination Parameters
   # obs. used (total)      222  
   data-arc span      140 days  
   first obs. used      2015-12-17  
   last obs. used      2016-05-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .6061  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:21  

Additional Information
 Earth MOID = 1.55452 au 
 Jupiter MOID = .00385033 au 
 T_jup = 1.237 
[ 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 12.1   0.8 21 2 parameter fit from 142 observations, autocmod 2.9c
comet total magnitude slope K1 10.5   n/a 21 autocmod 2.9c
comet nuclear magnitude M2 15.2   0.6 21 from 45 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 21 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 21 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2015.7   C/2015 YG1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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