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C/2012 BJ98 (Lemmon)
Classification: Jupiter-family Comet          SPK-ID: 1003175
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456027.5 (2012-Apr-10.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8736495875635185 2.7714e-05  
a 17.06822875305958 0.003769 au
q 2.15657774250929 4.5514e-06 au
i 2.636891990126354 0.00010381 deg
node 124.0317461903936 0.00058079 deg
peri 72.96983048833226 0.00065694 deg
M 357.7156170329778 0.0007711 deg
tp 2456190.935923559688
(2012-Sep-20.43592356)
0.0012669 TDB
period 25756.15968551199
70.52
8.5311
0.02336
d
yr
n .01397723901372231 4.6296e-06 deg/d
Q 31.97987976360987 0.0070617 au
  Orbit Determination Parameters
   # obs. used (total)      155  
   data-arc span      390 days (1.07 yr)  
   first obs. used      2011-12-29  
   last obs. used      2013-01-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .56883  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:32:00  

Additional Information
 Earth MOID = 1.15734 au 
 Jupiter MOID = .0532389 au 
 T_jup = 2.065 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 8.0   0.4 19 2 parameter fit from 78 observations, autocmod 2.9c
comet total magnitude slope K1 19.25   n/a 19 autocmod 2.9c
comet nuclear magnitude M2 14.8   0.6 19 from 56 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 19 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 19 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2012.7   C/2012 BJ98       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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