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381P/LINEAR-Spacewatch (2019 K2)
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 2457176.5 (2015-Jun-03.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6794354620132518 8.6804e-07  
a 7.12211119252796 8.775e-08 au
q 2.283096283922974 6.1652e-06 au
i 28.46258988192632 8.6843e-05 deg
node 174.1087066516962 6.0942e-05 deg
peri 172.549755955029 0.00090881 deg
M 278.0778089526399 0.00011518 deg
tp 2458756.330921556836
(2019-Sep-29.83092156)
0.0022377 TDB
period 6942.430670972492
19.01
0.0001283
3.513e-07
d
yr
n .05185503709892595 9.5834e-10 deg/d
Q 11.96112610113295 1.4737e-07 au
  Orbit Determination Parameters
   # obs. used (total)      171  
   data-arc span      6992 days (19.14 yr)  
   first obs. used      2000-09-01  
   last obs. used      2019-10-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50409  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:28:41  

Additional Information
 Earth MOID = 1.27991 au 
 Jupiter MOID = 2.09319 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 19 2 parameter fit from 141 observations, autocmod 2.9c
comet total magnitude slope K1 14.   n/a 19 autocmod 2.9c
comet nuclear magnitude M2 17.5   0.5 19 from 31 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

[ 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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