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C/1989 Y1 (Skorichenko-George)
Classification: Hyperbolic Comet          SPK-ID: 1001242
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2447945.5 (1990-Feb-23.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000297742003349 6.6807e-06  
a -5270.229293128217 118.26 AU
q 1.569168627844461 1.8941e-06 AU
i 59.36587802493165 4.7701e-05 deg
node 280.0094027530561 0.00012783 deg
peri 137.8333568862048 0.00012103 deg
M -.000123471545862165 4.1557e-06 deg
tp 2447993.429961209400
(1990-Apr-11.92996121)
0.00023317 JED
period n/a
n/a
n/a
n/a
d
yr
n 2.576082741288549E-6 8.6705e-08 deg/d
Q n/a n/a AU
  Orbit Determination Parameters
   # obs. used (total)      97  
   data-arc span      1008 days (2.76 yr)  
   first obs. used      1988-06-13  
   last obs. used      1991-03-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   fit RMS      1.053  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Oct-22 15:36:24  

Additional Information
 Earth MOID = .734742 AU 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 5.1 mag 1. 2 from 20 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 13.   n/a 2 autocmod 2.5c
comet nuclear magnitude M2 11.9 mag 1. 2 from 3 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 2 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 2 autocmod 2.5c
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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