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JPL Small-Body Database Browser
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381P/LINEAR-Spacewatch
Classification: Jupiter-family Comet          SPK-ID: 1000314
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457096.5 (2015-Mar-15.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .679446009386709 8.8071e-07  
a 7.120516042386837 8.7647e-08 au
q 2.282509832613058 6.2543e-06 au
i 28.46501817793593 8.7419e-05 deg
node 174.1107500515312 6.2218e-05 deg
peri 172.5640067929247 0.000918 deg
M 273.8924065834887 0.00011617 deg
tp 2458756.486596827081
(2019-Sep-29.98659683)
0.0022567 TDB
period 6940.09844134326
19.00
0.00012814
3.508e-07
d
yr
n .05187246305548395 9.5776e-10 deg/d
Q 11.95852225216061 1.472e-07 au
  Orbit Determination Parameters
   # obs. used (total)      163  
   data-arc span      6992 days (19.14 yr)  
   first obs. used      2000-09-01  
   last obs. used      2019-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50791  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:54:09  

Additional Information
 Earth MOID = 1.2777 au 
 Jupiter MOID = 2.09334 au 
 T_jup = 2.240 
[ 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 13.8   0.7 17 2 parameter fit from 133 observations, autocmod 2.8
comet total magnitude slope K1 14.   n/a 17 autocmod 2.8
comet nuclear magnitude M2 17.5   0.5 17 from 31 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 17 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 17 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2019.7   381P/2019 K2       
 2000.7   381P/2000 S4       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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