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C/2017 Y2 (PANSTARRS)
Classification: Hyperbolic Comet          SPK-ID: 1003551
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459009.5 (2020-Jun-09.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000701606843227 6.8807e-06  
a -6602.243314989419 64.742 au
q 4.632179090446719 4.6586e-06 au
i 128.4271041002525 1.6047e-05 deg
node 65.9787688777222 1.8788e-05 deg
peri 147.84567502 0.00010083 deg
M -.000272834417064517 4.0121e-06 deg
tp 2459158.002022489479
(2020-Nov-04.50202249)
0.00077357 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.837243779517189E-6 2.7024e-08 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      821  
   data-arc span      1294 days (3.54 yr)  
   first obs. used      2017-12-24  
   last obs. used      2021-07-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .47272  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-26 23:12:24  

Additional Information
 Earth MOID = 3.70712 au 
 Jupiter MOID = .340029 au 
 T_jup = -1.400 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 7.2   0.6 35 2 parameter fit from 741 observations, autocmod 2.9c
comet total magnitude slope K1 10.25   n/a 35 autocmod 2.9c
comet nuclear magnitude M2 11.4   0.2 35 from 22 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 35 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 35 autocmod 2.9c
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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