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C/2001 Q4 (NEAT)
Classification: Hyperbolic Comet          SPK-ID: 1000351
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2453141.5 (2004-May-16.0) TDB
Reference: JPL 207 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000688204104655 9.6998e-07  
a -1397.782599782068 1.97 au
q .9619597225853242 9.1376e-08 au
i 99.64263544704116 8.5227e-06 deg
node 210.278431108308 1.0385e-05 deg
peri 1.204334608020704 1.0881e-05 deg
M 6.468919385957737E-7 1.4431e-09 deg
tp 2453141.465700553637
(2004-May-15.96570055)
8.8899e-06 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.886012770438181E-5 3.9872e-08 deg/d
Q n/a n/a au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.635562356445317E-8 1.566E-10
A2 [EST] 4.916600112437359E-10 7.526E-11
A3 [EST] 4.929063627255129E-10 6.246E-11
  Orbit Determination Parameters
   # obs. used (total)      2630  
   data-arc span      1820 days (4.98 yr)  
   first obs. used      2001-08-24  
   last obs. used      2006-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   norm. resid. RMS      .79008  
   source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-07 23:41:44  

Additional Information
 Earth MOID = .0426515 au 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 7.8   1. 207 2 parameter fit from 413 observations, autocmod 2.6
comet total magnitude slope K1 7.   n/a 207 autocmod 2.6

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2004-May-06 17:45 < 00:01 Earth 0.320960799167257 0.32096029696327 0.320961301371245 56.2057342815981 56.2055865816615 2453132.239675626 0.00587657941876261 25.4754347675159 16.0538399693283 13.6698229864554 1953990.5081087 T 207 CATAB v2.0e-lin.ifort 2017-Nov-30 18:58:56 2017-Nov-30 18:58
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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