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JPL Small-Body Database Browser
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169P/NEAT
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1001656
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2454389.5 (2007-Oct-16.0) TDB
Reference: JPL 123 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7668707109626619 1.5477e-08  
a 2.60431370805085 1.0615e-08 au
q .6071418031880883 3.8397e-08 au
i 11.30280131314155 5.7409e-06 deg
node 176.2144830594115 3.1431e-05 deg
peri 217.9781689440939 3.1611e-05 deg
M 177.8994103022555 1.0486e-06 deg
tp 2453630.904294218438
(2005-Sep-17.40429422)
4.1925e-06 TDB
period 1535.106010848311
4.20
9.3857e-06
2.57e-08
d
yr
n .2345114913601709 1.4338e-09 deg/d
Q 4.601485612913612 1.8756e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1207  
   data-arc span      11005 days (30.13 yr)  
   first obs. used      1989-03-07  
   last obs. used      2019-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55226  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-15 08:30:48  

Additional Information
 Earth MOID = .142766 au 
 Jupiter MOID = .974973 au 
 T_jup = 2.888 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 2.395355613952613E-16 -5.937873525731401E-16 -2.798775583217276E-14 -3.879982083827863E-14 6.967877511467617E-14 -6.075049560770115E-15
q -5.937873525731401E-16 1.474303459173854E-15 6.779502216569552E-14 9.198114774138027E-14 -1.68452108379686E-13 1.33498587883828E-14
tp -2.798775583217276E-14 6.779502216569552E-14 1.757672979558514E-11 -3.305535698890045E-12 9.217953813190908E-12 9.307113575801837E-12
node -3.879982083827863E-14 9.198114774138027E-14 -3.305535698890045E-12 9.878901787196387E-10 -9.858517610195971E-10 -1.284751333619792E-10
peri 6.967877511467617E-14 -1.68452108379686E-13 9.217953813190908E-12 -9.858517610195971E-10 9.992866538879109E-10 1.293576138110312E-10
i -6.075049560770115E-15 1.33498587883828E-14 9.307113575801837E-12 -1.284751333619792E-10 1.293576138110312E-10 3.295807051445413E-11

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   1. 123 from 236 observations, assumed slope, autocmod 2.6q
comet total magnitude slope K1 12.   n/a 123 autocmod 2.6q
comet nuclear magnitude M2 18.4   1. 123 from 694 observations, autocmod 2.6q
comet nuclear magnitude slope K2 5.   n/a 123 autocmod 2.6q
comet nuclear phase coefficient PC 0.03   n/a 123 autocmod 2.6q
rotation period rot_per 8.369 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2006) Minor Planet Bull. 33, 35-39.]

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2001.5   169P/2002 EX12       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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