Orbital Analysis for matched events on 20210813_230013.483_UK

Summary for Event
-----------------
shower ID 7 PER
Lg 64.60° Bg 38.54° Vg 58.51km/s
mass 0.04212g, abs. mag -1.0
Path Details
------------
start -3.87° 49.26° 110.49km
end   -4.05° 49.10° 95.89km

Orbit Details
-------------
Semimajor axis 10.22A.U., eccentricity 0.91, inclination 112.50°, Period 32.70Y, LA Sun 141.11°, last Perihelion 2021-07-23

Full details below
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Input measurement type: Azimuth +east of due north for meas1, Elevation angle above the horizon for meas2

Uncertainties type:
 Purely geometric uncertainties

Reference JD: 2459440.458489395678
Time: 2021-08-13 23:00:13.483787 UTC


Plane intersections
-------------------
Intersection 1 - Stations: UK0021 and UK003E
 Convergence angle = 17.58546 deg
 R.A. =  48.25064  Dec = +58.92849 deg

Best intersection: Stations UK0021 and UK003E with Qconv = 17.59 deg


Least squares solution
----------------------
State vector (ECI, epoch of date):
 X =   2358838.89 +/- 100.31 m
 Y =  -3526732.99 +/- 226.02 m
 Z =   4893025.89 +/- 45.01 m
 Vx =    19880.01 +/- 534.67 m/s
 Vy =    23432.77 +/- 822.97 m/s
 Vz =    51017.32 +/- 473.30 m/s

State vector covariance matrix (X, Y, Z, Vx, Vy, Vz):
+1.070464e+04, -2.298234e+04, -2.496729e+03, +3.020023e+04, -6.904286e+04, -1.144687e+04
-2.298234e+04, +5.421859e+04, +6.691481e+03, -6.933812e+04, +1.729353e+05, +2.867153e+04
-2.496729e+03, +6.691481e+03, +2.195907e+03, -8.963267e+03, +1.911022e+04, +4.062321e+03
+3.020023e+04, -6.933812e+04, -8.963267e+03, +1.002273e+05, -2.404069e+05, -3.623478e+04
-6.904286e+04, +1.729353e+05, +1.911022e+04, -2.404069e+05, +6.922977e+05, +1.279598e+05
-1.144687e+04, +2.867153e+04, +4.062321e+03, -3.623478e+04, +1.279598e+05, +4.348421e+04

Timing offsets (from input data):
    UK0021: 0.000000 s
    UK002D: 0.000000 s
    UK003E: 0.000544 s

Reference point on the trajectory:
  Time: 2021-08-13 23:00:13.483787 UTC
  Lon     = +-3.874561 +/- 0.0007 deg
  Lat     = +49.257723 +/- 0.0018 deg
  Lat geo = +49.070574 +/- 0.0018 deg
  Ht      =  110437.53 +/- 139.80 m

  JD dynamic   = 2459440.459290136583 
  LST apparent = 303.7764002310 deg
Radiant (apparent in ECI which includes Earth's rotation, epoch of date):
  R.A.      =  49.68923 +/- 1.4017 deg
  Dec       = +58.93789 +/- 0.2875 deg
  Azimuth   =  36.67706 +/- 0.3253 deg
  Elevation = +33.82676 +/- 0.7249 deg
  Vavg      =  59.24704 +/- 0.4072 km/s
  Vinit     =  59.55734 +/- 0.3733 km/s
Radiant (apparent ground-fixed, epoch of date):
  R.A.      =  49.53258 +/- 1.4017 deg
  Dec       = +58.69323 +/- 0.2875 deg
  Azimuth   =  36.96335 +/- 0.3253 deg
  Elevation = +33.72772 +/- 0.7249 deg
  Vavg      =  59.40116 +/- 0.4072 km/s
  Vinit     =  59.71146 +/- 0.3733 km/s
Radiant (geocentric, J2000):
  R.A.   =  50.04762 +/- 1.3850 deg
  Dec    = +58.50468 +/- 0.2937 deg
  Vg     =  58.51484 +/- 0.3800 km/s
  Vinf   =  59.55734 +/- 0.3733 km/s
  Zc     =  56.32341 +/- 0.7255 deg
  Zg     =  56.86504 +/- 0.7277 deg
Radiant (ecliptic geocentric, J2000):
  Lg     =  64.60254 +/- 0.7543 deg
  Bg     = +38.53833 +/- 0.5091 deg
  Vh     =  40.79978 +/- 0.2266 km/s
Radiant (ecliptic heliocentric, J2000):
  Lh     =  85.55972 +/- 1.1561 deg
  Bh     = +63.32467 +/- 1.0781 deg
  Vh_x   =  -1.41806 +/- 0.3016 km/s
  Vh_y   = -18.26144 +/- 0.7960 km/s
  Vh_z   = -36.45724 +/- 0.2232 km/s
Orbit:
  La Sun = 141.108947 +/- -0.0000 deg
  a      =  10.224893 +/- 2.5960 AU
  e      =   0.907636 +/- 0.0203
  i      = 112.503510 +/- 0.7053 deg
  peri   = 149.042728 +/- 1.8042 deg
  node   = 141.107593 +/- 0.0001 deg
  Pi     = 290.150322 +/- 1.8043 deg
  q      =   0.944416 +/- 0.0081 AU
  f      =  30.953274 +/- 1.8042 deg
  M      =   0.659671 +/- 0.1882 deg
  Q      =  19.505370 +/- 5.1977 AU
  n      =   0.030145 +/- 0.0095 deg/day
  T      =  32.695561 +/- 13.3663 years
  Last perihelion JD = 2459418.576073 (2021-07-23 01:49:32.710557) +/- 1.0644 days
  Tj     =   0.058596 +/- 0.1206
Shower association:
  IAU No.  =    7
  IAU code =  PER

Orbit covariance matrix:
             e     ,     q (AU)   ,      Tp (JD) ,   node (rad) ,   peri (rad) ,    i (rad)
e   , +4.439489e-04, -1.238544e-04, -1.306170e-02, -1.653987e-08, -4.397624e-04, +2.200346e-04
q   , -1.238544e-04, +6.909927e-05, +8.898047e-03, +7.532523e-09, +2.673720e-04, -1.002144e-04
Tp  , -1.306170e-02, +8.898047e-03, +1.185219e+00, +9.300409e-07, +3.497960e-02, -1.237481e-02
node, -1.653987e-08, +7.532523e-09, +9.300409e-07, +9.118962e-13, +2.859630e-08, -1.213167e-08
peri, -4.397624e-04, +2.673720e-04, +3.497960e-02, +2.859630e-08, +1.042294e-03, -3.804765e-04
i   , +2.200346e-04, -1.002144e-04, -1.237481e-02, -1.213167e-08, -3.804765e-04, +1.613986e-04

Jacchia fit on lag = -|a1|*exp(|a2|*t):
 a1 = 0.000000
 a2 = 0.000000

Mean time residuals from time vs. length:
  Station with reference time: UK0021
  Avg. res. = 9.495e-06 s
  Stddev    = 3.08e-03 s

Begin point on the trajectory:
  Lon =    -3.873984 +/- 0.0006 deg
  Lat =    49.258230 +/- 0.0017 deg
  Ht  = 110485.51 +/- 143.02 m
End point on the trajectory:
  Lon =    -4.051852 +/- 0.0007 deg
  Lat =    49.102938 +/- 0.0013 deg
  Ht  = 95886.18 +/- 94.35 m

Stations
--------
        ID, Ignored, Lon +E (deg), Lat +N (deg),  Ht (m), Jacchia a1, Jacchia a2,  Beg Ht (m),  End Ht (m), +/- Obs ang (deg), +/- V (m), +/- H (m), Persp. angle (deg), Weight, FOV Beg, FOV End, Comment
    UK0021,   False,    -3.515726,    50.691998,   17.00,   0.000000,   0.000000,   110485.51,    95886.18,          0.012258,     39.80,     16.56,             105.70, 1.0000,    True,    True, {"ff_name": "FF_UK0021_20210813_230013_440_0247552.fits"}
    UK002D,    True,    -1.801980,    51.351940,  129.00,   0.000000,   0.000000,   107351.99,    95537.42,          0.096428,       nan,       nan,             122.29, 0.0000,    True,    True, {"ff_name": "FF_UK002D_20210813_230012_232_0254976.fits"}
    UK003E,   False,    -1.802002,    51.351948,  130.00,   0.000000,   0.000000,   108170.33,    96168.81,          0.011513,     46.55,     39.60,             122.29, 1.0000,    True,    True, {"ff_name": "FF_UK003E_20210813_230005_846_0255488.fits"}

Points
------
 No, Station ID,  Ignore,  Time (s),                   JD,     meas1,     meas2, Azim +E of due N (deg), Alt (deg), Azim line (deg), Alt line (deg), RA obs (deg), Dec obs (deg), RA line (deg), Dec line (deg),       X (m),       Y (m),       Z (m), Latitude (deg), Longitude (deg), Height (m),  Range (m), Length (m), State vect dist (m),  Lag (m), Vel (m/s), Vel prev avg (m/s), H res (m), V res (m), Ang res (asec), AppMag, AbsMag
  0,     UK0021,       0,  0.000000, 2459440.458489395678, 296.37064,  -5.50882,              189.26989,  33.40149,       189.29127,       33.40934,    296.37064,      -5.50882,     296.35362,       -5.49918,  2358867.66, -3526699.08,  4893099.71,      49.258230,       -3.873984,  110485.51,  196843.45,       0.00,               86.19,   209.09,      0.00,           59105.73,     25.70,    -61.84,          70.17,  +3.53,  +2.06
  1,     UK0021,       0,  0.040572, 2459440.458489865065, 296.01434,  -6.07019,              189.62072,  32.80615,       189.61222,       32.80304,    296.01434,      -6.07019,     296.02132,       -6.07404,  2358073.36, -3527635.33,  4891061.33,      49.244214,       -3.890097,  109161.11,  197537.75,    2379.59,             2293.41,    -0.05,  58651.14,           59105.73,    -10.32,     24.79,          28.04,  +1.75,  +0.27
  2,     UK0021,       0,  0.081108, 2459440.458490334451, 295.71151,  -6.61146,              189.90619,  32.23552,       189.90819,       32.23625,    295.71151,      -6.61146,     295.71024,       -6.61055,  2357326.64, -3528515.50,  4889145.04,      49.231030,       -3.905253,  107916.57,  198214.52,    4616.66,             4530.48,  -177.20,  55187.26,           59105.73,      2.45,     -5.88,           6.63,  +1.28,  -0.21
  3,     UK0021,       0,  0.121732, 2459440.458490804769, 295.34275,  -7.23456,              190.25274,  31.57543,       190.24832,       31.57381,    295.34275,      -7.23456,     295.34685,       -7.23660,  2356448.34, -3529550.75,  4886891.10,      49.215514,       -3.923046,  106453.42,  199039.61,    7247.90,             7161.71,    34.58,  64770.40,           59105.73,     -5.47,     13.14,          14.75,  +1.02,  -0.47
  4,     UK0021,       0,  0.162300, 2459440.458491274156, 295.01539,  -7.80129,              190.55342,  30.97504,       190.55187,       30.97447,    295.01539,      -7.80129,     295.01734,       -7.80201,  2355648.33, -3530493.74,  4884838.06,      49.201373,       -3.939266,  105121.30,  199818.66,    9644.61,             9558.43,    15.17,  59078.95,           59536.92,     -1.95,      4.68,           5.23,  +0.87,  -0.63
  5,     UK0021,       0,  0.202860, 2459440.458491743542, 294.70093,  -8.36989,              190.83434,  30.37350,       190.84937,       30.37897,    294.70093,      -8.36989,     294.68944,       -8.36289,  2354848.05, -3531437.04,  4882784.33,      49.187219,       -3.955489,  103789.34,  200623.71,   12042.12,            11955.93,    -2.97,  59110.12,           59599.15,     18.93,    -45.50,          50.66,  +0.81,  -0.70
  6,     UK0021,       0,  0.243444, 2459440.458492213394, 294.35281,  -8.94956,              191.14719,  29.75613,       191.15479,       29.75889,    294.35281,      -8.94956,     294.34754,       -8.94599,  2354008.68, -3532426.41,  4880630.29,      49.172365,       -3.972493,  102392.96,  201495.34,   14556.74,            14470.55,    94.58,  61960.92,           59874.48,      9.67,    -23.24,          25.77,  +0.64,  -0.88
  7,     UK0021,       0,  0.283972, 2459440.458492682315, 294.04990,  -9.48044,              191.41138,  29.19191,       191.42791,       29.19792,    294.04990,      -9.48044,     294.03735,       -9.47264,  2353243.77, -3533328.01,  4878667.34,      49.158820,       -3.988001,  101121.02,  202313.89,   16848.27,            16762.09,   -27.63,  56541.95,           59711.83,     21.20,    -50.95,          56.27,  +0.66,  -0.87
  8,     UK0021,       0,  0.324516, 2459440.458493151702, 293.73482, -10.02425,              191.68321,  28.61267,       191.70540,       28.62073,    293.73482,     -10.02425,     293.71763,      -10.01371,  2352450.92, -3534262.55,  4876632.68,      49.144773,       -4.004067,   99803.20,  203186.20,   19223.52,            19137.34,   -67.07,  58584.50,           59560.80,     28.73,    -69.04,          75.91,  +0.58,  -0.96
  9,     UK0021,       0,  0.365124, 2459440.458493621554, 293.37198, -10.63035,              191.99410,  27.96472,       192.01306,       27.97160,    293.37198,     -10.63035,     293.35757,      -10.62128,  2351551.78, -3535322.38,  4874325.24,      49.128834,       -4.022262,   98309.42,  204204.27,   21917.21,            21831.03,   208.12,  66333.96,           59853.71,     24.79,    -59.56,          65.16,  +0.73,  -0.82
 10,     UK0021,       0,  0.405656, 2459440.458494090941, 293.03558, -11.15070,              192.28399,  27.40437,       192.27976,       27.40283,    293.03558,     -11.15070,     293.04085,      -11.15273,  2350757.25, -3536258.90,  4872286.27,      49.114740,       -4.038356,   96990.06,  205129.50,   24297.51,            24211.32,   174.43,  58726.27,           59962.26,     -5.59,     13.41,          14.60,  +0.73,  -0.83
 11,     UK0021,       0,  0.446100, 2459440.458494558930, 292.78142, -11.59739,              192.49174,  26.92745,       192.49966,       26.93031,    292.78142,     -11.59739,     292.77656,      -11.59357,  2350092.22, -3537042.77,  4870579.64,      49.102938,       -4.051852,   95886.18,  205922.33,   26289.81,            26203.62,  -242.00,  49260.78,           59614.65,     10.53,    -25.27,          27.42,  +1.57,  +0.00
  0,     UK002D,       1,  0.093527, 2459440.458490478341, 273.63494, -13.32449,              213.39271,  19.52259,       213.25623,       19.51151,    273.63494,     -13.32449,     273.75503,      -13.38022,  2356987.78, -3528914.92,  4888275.44,      49.225045,       -3.912105,  107351.99,  302292.33,       0.00,             5545.65,    98.36,      0.00,           58619.72,   -442.91,    517.57,         464.81,  +2.73,  +0.33
  1,     UK002D,       1,  0.133855, 2459440.458490944933, 273.50245, -13.69077,              213.38321,  19.13442,       213.29411,       19.12714,    273.50245,     -13.69077,     273.58142,      -13.72732,  2356165.53, -3529884.11,  4886165.33,      49.210516,       -3.928771,  105982.44,  303682.05,    2463.33,             8008.97,   159.86,  61082.28,           58619.72,   -290.87,    340.51,         304.17,  +1.83,  -0.58
  2,     UK002D,       1,  0.174151, 2459440.458491411526, 273.34559, -14.01980,              213.41063,  18.77278,       213.32964,       18.76616,    273.34559,     -14.01980,     273.41782,      -14.05315,  2355386.44, -3530802.42,  4884165.99,      49.196742,       -3.944570,  104685.37,  305011.73,    4797.34,            10342.99,    93.95,  57921.83,           58619.72,   -266.10,    311.59,         277.09,  +1.81,  -0.61
  3,     UK002D,       1,  0.214431, 2459440.458491877653, 273.16858, -14.33017,              213.46368,  18.42170,       213.36422,       18.41360,    273.16858,     -14.33017,     273.25757,      -14.37125,  2354618.93, -3531707.10,  4882196.35,      49.183165,       -3.960133,  103408.10,  306333.58,    7096.70,            12642.35,    -5.66,  57084.31,           58619.72,   -329.01,    384.92,         340.96,  +1.74,  -0.69
  4,     UK002D,       1,  0.254727, 2459440.458492343780, 273.02922, -14.65786,              213.47371,  18.06745,       213.39861,       18.06131,    273.02922,     -14.65786,     273.09700,      -14.68900,  2353845.29, -3532619.00,  4880210.99,      49.169472,       -3.975817,  102121.21,  307677.65,    9414.40,            14960.04,   -87.89,  57516.85,           58222.41,   -249.87,    292.61,         257.95,  +1.29,  -1.15
  5,     UK002D,       1,  0.295063, 2459440.458492810838, 272.83136, -15.02998,              213.52203,  17.65159,       213.43872,       17.64479,    272.83136,     -15.02998,     272.90688,      -15.06465,  2352921.61, -3533707.74,  4877840.60,      49.153114,       -3.994507,  100585.49,  309296.41,   12181.58,            17727.22,   276.99,  68603.14,           59593.29,   -279.39,    327.03,         286.85,  +1.18,  -1.27
  6,     UK002D,       1,  0.335315, 2459440.458493276499, 272.67120, -15.31232,              213.56753,  17.33265,       213.46986,       17.32470,    272.67120,     -15.31232,     272.75995,      -15.35308,  2352205.33, -3534552.04,  4876002.42,      49.140421,       -4.009036,   99395.10,  310564.32,   14327.46,            19873.11,    25.57,  53311.25,           59410.48,   -329.62,    385.55,         336.90,  +1.24,  -1.22
  7,     UK002D,       1,  0.375655, 2459440.458493743557, 272.47006, -15.68834,              213.61578,  16.91213,       213.51001,       16.90354,    272.47006,     -15.68834,     272.56655,      -15.73265,  2351253.55, -3535673.91,  4873559.91,      49.123545,       -4.028283,   97814.15,  312262.04,   17178.82,            22724.47,   474.39,  70683.29,           60274.69,   -359.75,    420.61,         365.60,  +1.24,  -1.23
  8,     UK002D,       1,  0.415947, 2459440.458494209684, 272.32760, -16.01574,              213.62641,  16.55735,       213.54383,       16.55063,    272.32760,     -16.01574,     272.40368,      -16.05047,  2350448.06, -3536623.34,  4871492.82,      49.109254,       -4.044595,   96476.82,  313712.91,   19591.93,            25137.58,   487.82,  59890.58,           60652.32,   -282.59,    330.69,         286.00,  +1.66,  -0.82
  9,     UK002D,       1,  0.456131, 2459440.458494674880, 272.16376, -16.21418,              213.70494,  16.31552,       213.56792,       16.30447,    272.16376,     -16.21418,     272.28928,      -16.27187,  2349882.06, -3537290.49,  4870040.31,      49.099207,       -4.056105,   95537.42,  314741.35,   21287.59,            26833.24,  -209.78,  42197.28,           59841.04,   -471.60,    550.54,         475.07,  +5.94,  +3.45
  0,     UK003E,       0,  0.074056, 2459440.458490246441, 273.88492, -13.18367,              213.20357,  19.74010,       213.23318,       19.74256,    273.88492,     -13.18367,     273.85932,      -13.17156,  2357478.91, -3528336.01,  4889535.82,      49.233719,       -3.902165,  108170.33,  301469.01,       0.00,             4074.28,  -213.40,      0.00,           58511.97,     95.34,   -112.17,         100.72,  +3.00,  +0.60
  1,     UK003E,       0,  0.114480, 2459440.458490714431, 273.64051, -13.58348,              213.29039,  19.28218,       213.27836,       19.28118,    273.64051,     -13.58348,     273.65155,      -13.58841,  2356496.24, -3529494.29,  4887014.03,      49.216361,       -3.922053,  106533.21,  303120.46,    2943.93,             7018.21,   322.98,  72826.20,           58511.97,    -39.09,     45.91,          41.03,  +3.31,  +0.90
  2,     UK003E,       0,  0.154776, 2459440.458491180558, 273.50789, -13.88906,              213.30381,  18.95080,       213.31107,       18.95140,    273.50789,     -13.88906,     273.50214,      -13.88607,  2355787.48, -3530329.71,  4885195.17,      49.203833,       -3.936441,  105352.98,  304325.44,    5067.25,             9141.53,    46.38,  52693.17,           58511.97,     23.74,    -27.90,          24.83,  +2.56,  +0.14
  3,     UK003E,       0,  0.195072, 2459440.458491647150, 273.35524, -14.17698,              213.34258,  18.62911,       213.34295,       18.62914,    273.35524,     -14.17698,     273.35573,      -14.17683,  2355089.43, -3531152.52,  4883403.78,      49.191489,       -3.950613,  104191.02,  305522.18,    7158.51,            11232.79,  -262.28,  51897.52,           58511.97,      1.20,     -1.41,           1.25,  +1.86,  -0.57
  4,     UK003E,       0,  0.235420, 2459440.458492114209, 273.18082, -14.52305,              213.37982,  18.24561,       213.38031,       18.24565,    273.18082,     -14.52305,     273.18136,      -14.52284,  2354251.37, -3532140.35,  4881253.09,      49.176660,       -3.967590,  102796.62,  306970.48,    9669.22,            13743.50,  -154.59,  62226.25,           58399.83,      1.64,     -1.93,           1.70,  +1.14,  -1.30
  5,     UK003E,       0,  0.275788, 2459440.458492581267, 272.98423, -14.88326,              213.43206,  17.84133,       213.41949,       17.84029,    272.98423,     -14.88326,     272.99657,      -14.88849,  2353356.72, -3533194.87,  4878957.21,      49.160821,       -3.985700,  101308.82,  308531.29,   12349.42,            16423.70,   121.40,  66394.22,           59510.90,    -41.94,     49.24,          43.24,  +0.48,  -1.97
  6,     UK003E,       0,  0.316128, 2459440.458493048325, 272.81250, -15.22222,              213.46786,  17.46552,       213.45578,       17.46452,    272.81250,     -15.22222,     272.82460,      -15.22726,  2352519.26, -3534182.00,  4876808.06,      49.145985,       -4.002660,   99916.78,  310006.70,   14858.32,            18932.60,   227.76,  62193.89,           60195.07,    -40.57,     47.63,          41.63,  +1.12,  -1.34
  7,     UK003E,       0,  0.356424, 2459440.458493514452, 272.67097, -15.51892,              213.49032,  17.13965,       213.48731,       17.13940,    272.67097,     -15.51892,     272.67515,      -15.52018,  2351788.29, -3535043.61,  4874932.19,      49.133028,       -4.017482,   98702.26,  311306.16,   17048.20,            21122.48,    17.72,  54344.92,           59993.11,    -10.18,     11.96,          10.41,  +0.85,  -1.62
  8,     UK003E,       0,  0.396764, 2459440.458493981510, 272.49434, -15.85819,              213.52928,  16.76198,       213.52348,       16.76150,    272.49434,     -15.85819,     272.50121,      -15.86063,  2350930.75, -3536054.40,  4872731.51,      49.117818,       -4.034839,   97278.12,  312842.33,   19617.26,            23691.54,   184.23,  63685.08,           60144.98,    -19.73,     23.17,          20.07,  +1.05,  -1.43
  9,     UK003E,       0,  0.437028, 2459440.458494447637, 272.37065, -16.12645,              213.54461,  16.46892,       213.55176,       16.46951,    272.37065,     -16.12645,     272.36604,      -16.12343,  2350262.52, -3536842.05,  4871016.66,      49.105960,       -4.048399,   96168.81,  314050.15,   21619.17,            25693.45,  -211.88,  49719.52,           59654.74,     24.46,    -28.73,          24.78,  +2.89,  +0.41

Notes
-----
- Points that have not been taken into consideration when computing the trajectory have '1' in the 'Ignore' column.
- The time already has time offsets applied to it.
- 'meas1' and 'meas2' are given input points.
- X, Y, Z are ECI (Earth-Centered Inertial) positions of projected lines of sight on the radiant line.
- Zc is the observed zenith distance of the entry angle, while the Zg is the entry zenith distance corrected for Earth's gravity.
- Latitude (deg) and Longitude (deg) are in WGS84 coordinates, while Height (m) is in the EGM96 datum. There values are coordinates of each point on the radiant line.
- Jacchia (1955) deceleration equation fit was done on the lag.
- Right ascension and declination in the table are given in the epoch of date for the corresponding JD, per every point.
- 'RA and Dec obs' are the right ascension and declination calculated from the observed values, while the 'RA and Dec line' are coordinates of the lines of sight projected on the fitted radiant line. The coordinates are in the epoch of date, and NOT J2000!. 'Azim and alt line' are thus corresponding azimuthal coordinates.
- 'Vel prev avg' is the average velocity including all previous points up to the given point. For the first 4 points this velocity is computed as the average velocity of those 4 points.