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P/2018 Y2 (Africano)
Classification: Jupiter-family Comet          SPK-ID: 1003601
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458494.5 (2019-Jan-11.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4793481795777027 3.5628e-05  
a 7.477652452378453 0.00060076 au
q 3.893253361816097 0.00013253 au
i 11.68034539858378 0.0009775 deg
node 297.2649107480066 0.0013776 deg
peri 162.4986169608806 0.037432 deg
M .4049638799285661 0.011838 deg
tp 2458486.098436213606
(2019-Jan-02.59843621)
0.24517 TDB
period 7468.722799760216
20.45
0.90007
0.002464
d
yr
n .04820101236205444 5.8088e-06 deg/d
Q 11.06205154294081 0.00088874 au
  Orbit Determination Parameters
   # obs. used (total)      81  
   data-arc span      101 days  
   first obs. used      2018-12-10  
   last obs. used      2019-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .5211  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-31 22:43:01  

Additional Information
 Earth MOID = 2.91225 au 
 Jupiter MOID = 1.06252 au 
 T_jup = 2.756 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 10.9   0.4 6 from 74 observations, assumed slope, autocmod 2.9c
comet total magnitude slope K1 10.   n/a 6 autocmod 2.9c
comet nuclear magnitude M2 12.9   0.3 6 from 3 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 6 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 6 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2019.0   P/2018 Y2       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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