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C/2015 H1 (Bressi)
Classification: Halley-type Comet*          SPK-ID: 1003384
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457169.5 (2015-May-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9407940389046346 8.7892e-05  
a 32.5365717861044 0.048855 au
q 1.926359003344659 3.3059e-05 au
i 140.6555743396824 8.4771e-05 deg
node 325.8044564735717 0.00039653 deg
peri 21.75672735502181 0.0029576 deg
M .3153467898680218 0.0007409 deg
tp 2457110.119749157573
(2015-Mar-28.61974916)
0.005824 TDB
period 67788.51407436341
185.59
152.68
0.418
d
yr
n .005310634182143057 1.1961e-05 deg/d
Q 63.14678456886413 0.094817 au
  Orbit Determination Parameters
   # obs. used (total)      210  
   data-arc span      98 days  
   first obs. used      2015-04-20  
   last obs. used      2015-07-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      5  
   norm. resid. RMS      .6201  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:09  

Additional Information
 Earth MOID = .944903 au 
 Jupiter MOID = 2.54047 au 
 T_jup = -1.151 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 4.2   0.6 19 2 parameter fit from 94 observations, autocmod 2.9c
comet total magnitude slope K1 40.75   n/a 19 autocmod 2.9c
comet nuclear magnitude M2 16.3   0.5 19 from 95 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 
 2015.2   C/2015 H1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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