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273P/Pons-Gambart
Classification: Halley-type Comet* [NEO]          SPK-ID: 1000765
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456369.5 (2013-Mar-18.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9753243637351361 2.9535e-06  
a 32.83234422184744 0.0040436 au
q .8101589837411138 3.2556e-06 au
i 136.3960312451835 2.2743e-05 deg
node 320.431171565636 7.1633e-05 deg
peri 20.19191150127465 0.00022406 deg
M .4627592762098047 8.5891e-05 deg
tp 2456281.170881203234
(2012-Dec-19.67088120)
9.0574e-05 TDB
period 68714.95484062223
188.13
12.694
0.03475
d
yr
n .005239034222389953 9.6784e-07 deg/d
Q 64.85452945995377 0.0079873 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 4.352356350455326E-10 1.21E-9
A2 [EST] 7.729121751498065E-10 1.544E-10
  Orbit Determination Parameters
   # obs. used (total)      1140  
   data-arc span      68223 days (186.78 yr)  
   first obs. used      1827-06-21  
   last obs. used      2014-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .54483  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 11:13:02  

Additional Information
 Earth MOID = .171823 au 
 Jupiter MOID = 1.38916 au 
 T_jup = -0.645 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 11.3   1. 10 2 parameter fit from 184 observations, autocmod 2.8
comet total magnitude slope K1 8.5   n/a 10 autocmod 2.8
comet nuclear magnitude M2 14.9   0.8 10 from 784 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 10 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 10 autocmod 2.8

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2013.0   273P/2012 V4       
 1824.8   273P/1827 M1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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