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C/2017 M4 (ATLAS)
Classification: Hyperbolic Comet          SPK-ID: 1003524
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458285.5 (2018-Jun-16.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.001084237480781 2.9615e-06  
a -2999.068080311761 8.1905 au
q 3.251702020087642 2.2024e-06 au
i 105.6570899144157 9.3403e-06 deg
node 65.86834588032342 1.5167e-05 deg
peri 167.6525920559625 6.8943e-05 deg
M -.001298259444378556 5.3168e-06 deg
tp 2458501.840038955237
(2019-Jan-18.34003896)
0.00029414 TDB
period n/a
n/a
n/a
n/a
d
yr
n 6.001013268963954E-6 2.4583e-08 deg/d
Q n/a n/a au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 9.025948340894811E-6 2.198E-7
A2 [EST] 8.883206192298023E-7 2.534E-7
A3 [EST] 2.184126710195829E-6 8.185E-8
  Orbit Determination Parameters
   # obs. used (total)      3290  
   data-arc span      1387 days (3.80 yr)  
   first obs. used      2017-06-16  
   last obs. used      2021-04-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .52038  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-02 23:42:38  

Additional Information
 Earth MOID = 2.25522 au 
 Jupiter MOID = 2.05769 au 
 T_jup = -0.602 
[ hide covariance matrix ]
Orbit Covariance (9×9)
  e q tp node peri i A1 A2 A3
e 8.770359547775786E-12 3.794035615820371E-12 -7.543471857221442E-10 2.760564080063181E-12 -1.419402570927869E-10 -1.082938819411536E-11 -2.919118771866739E-13 -3.983023712382516E-13 -3.468376733125508E-14
q 3.794035615820371E-12 4.85044076932854E-12 -4.991066268036577E-10 -7.40472418209881E-12 -1.444890307528375E-10 -3.934706574927483E-12 -4.655481274264519E-13 1.500155111875086E-13 1.760592352800321E-14
tp -7.543471857221442E-10 -4.991066268036577E-10 8.651843100011458E-8 9.697021893318865E-11 1.847391590420172E-8 8.306738502002055E-10 4.400252642683868E-11 2.253303765989461E-11 1.614900519493785E-12
node 2.760564080063181E-12 -7.40472418209881E-12 9.697021893318865E-11 2.30022766234863E-10 2.153681568290987E-10 -8.863211238996357E-11 8.061147554262931E-13 -1.114950240405624E-12 -9.169833272935611E-13
peri -1.419402570927869E-10 -1.444890307528375E-10 1.847391590420172E-8 2.153681568290987E-10 4.753131553258075E-9 1.24225981625865E-10 1.368279395915447E-11 -1.235812058862735E-12 -4.521554106329245E-13
i -1.082938819411536E-11 -3.934706574927483E-12 8.306738502002055E-10 -8.863211238996357E-11 1.24225981625865E-10 8.724051453411723E-11 2.797858626568243E-13 5.638274568541053E-13 4.613566108171081E-13
A1 -2.919118771866739E-13 -4.655481274264519E-13 4.400252642683868E-11 8.061147554262931E-13 1.368279395915447E-11 2.797858626568243E-13 4.83047999436043E-14 -1.998124006500674E-14 -2.267279624286413E-15
A2 -3.983023712382516E-13 1.500155111875086E-13 2.253303765989461E-11 -1.114950240405624E-12 -1.235812058862735E-12 5.638274568541053E-13 -1.998124006500674E-14 6.419684701636354E-14 5.375212638871609E-15
A3 -3.468376733125508E-14 1.760592352800321E-14 1.614900519493785E-12 -9.169833272935611E-13 -4.521554106329245E-13 4.613566108171081E-13 -2.267279624286413E-15 5.375212638871609E-15 6.698853436859802E-15

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 9.3   0.6 52 2 parameter fit from 1345 observations, autocmod 2.9c
comet total magnitude slope K1 6.25   n/a 52 autocmod 2.9c
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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