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361P/Spacewatch
Classification: Jupiter-family Comet          SPK-ID: 1003533
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458011.5 (2017-Sep-15.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4378875708883224 1.4264e-07  
a 4.94568054315447 2.3717e-07 au
q 2.78002850372292 6.7576e-07 au
i 13.8828328494577 1.7851e-05 deg
node 203.2779391977445 6.8497e-05 deg
peri 219.2428622431537 0.00016954 deg
M 333.9573769302318 7.2605e-05 deg
tp 2458302.116147978525
(2018-Jul-02.61614798)
0.00080965 TDB
period 4017.330089675962
11.00
0.00028898
7.912e-07
d
yr
n .08961175506218799 6.4461e-09 deg/d
Q 7.111332582586019 3.4103e-07 au
  Orbit Determination Parameters
   # obs. used (total)      380  
   data-arc span      4910 days (13.44 yr)  
   first obs. used      2006-10-11  
   last obs. used      2020-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .66594  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:28:34  

Additional Information
 Earth MOID = 1.8081 au 
 Jupiter MOID = .381875 au 
 T_jup = 2.754 
[ 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
absolute magnitude H 14.7   n/a MPO170157  
comet total magnitude M1 4.6   0.8 17 2 parameter fit from 240 observations, autocmod 2.9c
comet total magnitude slope K1 23.5   n/a 17 autocmod 2.9c
comet nuclear magnitude M2 14.0   0.5 17 from 113 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 17 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 17 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2018.5   361P/2017 S4       
 2007.5   361P/2006 UR111       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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