Orbital Analysis for matched events on 20210813_001446.589_UK

Summary for Event
-----------------
shower ID 7 PER
Lg 62.41° Bg 37.50° Vg 60.85km/s
mass 0.17060g, abs. mag -2.4
Path Details
------------
start 3.68° 50.80° 109.97km
end   3.54° 50.72° 96.62km

Orbit Details
-------------
Semimajor axis -24.76A.U., eccentricity 1.04, inclination 115.65°, Period 1000000000.00Y, LA Sun 140.20°, 

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: 2459439.510261453688
Time: 2021-08-13 00:14:46.589599 UTC


Plane intersections
-------------------
Intersection 1 - Stations: UK002C and UK002N
 Convergence angle = 2.65839 deg
 R.A. =  54.70150  Dec = +67.26842 deg
Intersection 2 - Stations: UK002C and UK0032
 Convergence angle = 25.98623 deg
 R.A. =  49.59536  Dec = +58.55963 deg
Intersection 3 - Stations: UK002N and UK0032
 Convergence angle = 23.36407 deg
 R.A. =  48.36726  Dec = +57.73466 deg

Best intersection: Stations UK002C and UK0032 with Qconv = 25.99 deg


Least squares solution
----------------------
State vector (ECI, epoch of date):
 X =   3523201.46 +/- 220.93 m
 Y =  -2114414.01 +/- 153.33 m
 Z =   5004668.15 +/- 98.73 m
 Vx =    22665.44 +/- 1209.58 m/s
 Vy =    24675.18 +/- 762.52 m/s
 Vz =    51998.58 +/- 1121.35 m/s

State vector covariance matrix (X, Y, Z, Vx, Vy, Vz):
-1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00
-1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00
-1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00
-1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00
-1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00
-1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00

Timing offsets (from input data):
    UK000F: 0.000000 s
    UK002C: -0.000259 s
    UK002N: 0.000000 s
    UK0032: -0.002272 s

Reference point on the trajectory:
  Time: 2021-08-13 00:14:46.589599 UTC
  Lon     = ++3.676046 +/- 0.0034 deg
  Lat     = +50.798432 +/- 0.0005 deg
  Lat geo = +50.613014 +/- 0.0005 deg
  Ht      =  109985.87 +/- 144.03 m

  JD dynamic   = 2459439.511062194593 
  LST apparent = 329.0303470848 deg
Radiant (apparent in ECI which includes Earth's rotation, epoch of date):
  R.A.      =  47.43090 +/- 0.8923 deg
  Dec       = +57.20450 +/- 1.0777 deg
  Azimuth   =  49.89228 +/- 1.6461 deg
  Elevation = +46.07477 +/- 0.2880 deg
  Vavg      =  59.34267 +/- 0.6661 km/s
  Vinit     =  61.85822 +/- 0.6128 km/s
Radiant (apparent ground-fixed, epoch of date):
  R.A.      =  47.53303 +/- 0.8923 deg
  Dec       = +56.97651 +/- 1.0777 deg
  Azimuth   =  50.14864 +/- 1.6461 deg
  Elevation = +45.92199 +/- 0.2880 deg
  Vavg      =  59.50217 +/- 0.6661 km/s
  Vinit     =  62.01772 +/- 0.6128 km/s
Radiant (geocentric, J2000):
  R.A.   =  47.63926 +/- 0.9133 deg
  Dec    = +56.95248 +/- 1.0795 deg
  Vg     =  60.85499 +/- 0.6231 km/s
  Vinf   =  61.85822 +/- 0.6128 km/s
  Zc     =  44.04486 +/- 0.2865 deg
  Zg     =  44.42379 +/- 0.2855 deg
Radiant (ecliptic geocentric, J2000):
  Lg     =  62.40860 +/- 0.9917 deg
  Bg     = +37.50157 +/- 0.8916 deg
  Vh     =  42.27193 +/- 0.1908 km/s
Radiant (ecliptic heliocentric, J2000):
  Lh     =  79.29907 +/- 3.2205 deg
  Bh     = +61.21339 +/- 1.1225 deg
  Vh_x   =  -3.77976 +/- 1.1677 km/s
  Vh_y   = -20.00201 +/- 0.6447 km/s
  Vh_z   = -37.04793 +/- 0.3934 km/s
Orbit:
  La Sun = 140.198353 +/- 0.0000 deg
  a      = -24.759012 +/- 5.5138 AU
  e      =   1.038722 +/- 0.0174
  i      = 115.645073 +/- 1.7282 deg
  peri   = 153.428160 +/- 1.6001 deg
  node   = 140.197520 +/- 0.0001 deg
  Pi     = 293.625680 +/- 1.6000 deg
  q      =   0.958720 +/- 0.0068 AU
  f      =  26.567923 +/- 1.6002 deg
  M      =        nan +/- nan deg
  Q      = -50.476744 +/- 11.0276 AU
  n      =   0.008000 +/- 0.0067 deg/day
  T      = 1000000000.000000 +/- 0.0000 years
  Last perihelion JD = NaN 
  Tj     =  -0.740663 +/- 0.1079
Shower association:
  IAU No.  =    7
  IAU code =  PER

Orbit covariance matrix:
             e     ,     q (AU)   ,      Tp (JD) ,   node (rad) ,   peri (rad) ,    i (rad)
e   , -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00
q   , -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00
Tp  , -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00
node, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00
peri, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00
i   , -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00, -1.000000e+00

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: UK002N
  Avg. res. = 1.420e-06 s
  Stddev    = 1.19e-03 s

Begin point on the trajectory:
  Lon =     3.675877 +/- 0.0031 deg
  Lat =    50.798341 +/- 0.0006 deg
  Ht  = 109969.42 +/- 105.33 m
End point on the trajectory:
  Lon =     3.537252 +/- 0.0028 deg
  Lat =    50.724849 +/- 0.0013 deg
  Ht  = 96621.03 +/- 40.25 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
    UK000F,    True,    -1.306160,    51.883100,   80.00,   0.000000,   0.000000,   110794.78,   100854.20,          0.245903,       nan,       nan,              60.62, 0.0000,    True,    True, {"ff_name": "FF_UK000F_20210813_001438_337_0343552.fits"}
    UK002C,   False,    -1.801980,    51.351940,  130.00,   0.000000,   0.000000,   108670.95,    96928.09,          0.020216,     70.62,    122.34,              54.31, 0.6597,    True,    True, {"ff_name": "FF_UK002C_20210813_001444_914_0362752.fits"}
    UK002N,   False,    -0.727590,    51.263100,   57.00,   0.018094,  32.622478,   109969.42,    98090.54,          0.011653,     36.36,     56.11,              52.09, 0.6225,    True,    True, {"ff_name": "FF_UK002N_20210813_001443_514_0370944.fits"}
    UK0032,   False,    -0.023645,    52.984073,    6.00,   6.178745,   2.207918,   107245.01,    96621.03,          0.019730,    105.62,     69.86,              76.88, 0.9484,    True,    True, {"ff_name": "FF_UK0032_20210813_001442_493_0364288.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,     UK000F,       1, -0.008704, 2459439.510261353105,  31.26526,   1.63501,              107.29312,  15.15205,       107.10589,       14.96148,     31.26526,      +1.63501,      31.52374,       +1.58778,  3523612.95, -2113966.03,  5005612.19,      50.802866,       +3.684391,  110794.78,  387125.03,       0.00,             1123.04,  2371.99,     -0.00,           59171.68,   1377.09,   1119.74,         945.68,  +2.38,  -0.56
  1,     UK000F,       1,  0.031508, 2459439.510261818301,  31.25289,   1.37952,              107.45938,  14.95293,       107.29619,       14.78708,     31.25289,      +1.37952,      31.47824,       +1.33846,  3522867.59, -2114777.48,  5003902.20,      50.794832,       +3.669173,  109329.62,  386011.51,    2034.23,              911.19,  -327.30,  50587.72,           59171.68,   1197.07,    971.96,         823.95,  +0.99,  -1.94
  2,     UK000F,       1,  0.071768, 2459439.510262284428,  31.20974,   1.06607,              107.68631,  14.72492,       107.53292,       14.56924,     31.20974,      +1.06607,      31.42168,       +1.02752,  3521943.98, -2115782.98,  5001783.29,      50.784870,       +3.650353,  107514.50,  384644.79,    4554.92,             3431.88,  -297.02,  62610.22,           59171.68,   1121.20,    909.81,         774.29,  +0.51,  -2.42
  3,     UK000F,       1,  0.112012, 2459439.510262750089,  31.12251,   0.75576,              107.94773,  14.52513,       107.77286,       14.34776,     31.12251,      +0.75576,      31.36425,       +0.71174,  3521012.64, -2116796.91,  4999646.62,      50.774816,       +3.631375,  105684.63,  383278.65,    7096.73,             5973.69,  -244.64,  63159.99,           59171.68,   1273.22,   1034.47,         882.85,  +0.33,  -2.59
  4,     UK000F,       1,  0.152292, 2459439.510263216216,  31.09294,   0.41499,              108.17892,  14.26657,       108.02681,       14.11254,     31.09294,      +0.41499,      31.30337,       +0.37679,  3520031.94, -2117864.56,  4997396.72,      50.764220,       +3.611397,  103758.30,  381853.76,    9773.24,             8650.19,   -59.78,  66447.51,           61141.68,   1103.61,    895.45,         767.68,  +0.36,  -2.55
  5,     UK000F,       1,  0.192532, 2459439.510263681877,  31.00761,   0.11139,              108.43374,  14.07057,       108.26063,       13.89539,     31.00761,      +0.11139,      31.24717,       +0.06784,  3519133.76, -2118842.38,  4995336.14,      50.754506,       +3.593084,  101994.50,  380559.79,   12224.53,            11101.49,   -97.66,  60916.89,           61672.07,   1251.18,   1016.42,         873.72,  +0.69,  -2.21
  6,     UK000F,       1,  0.232672, 2459439.510264146607,  30.91250,  -0.07871,              108.62790,  13.97209,       108.41269,       13.75424,     30.91250,      -0.07871,      31.21039,       -0.13306,  3518552.99, -2119474.66,  4994003.73,      50.748221,       +3.581182,  100854.20,  379725.44,   13809.59,            12686.54,  -995.59,  39488.15,           59491.58,   1551.17,   1263.23,        1086.65,  +3.02,  +0.12
  0,     UK002C,       0,  0.036623, 2459439.510261880700,  39.45536,   6.34770,               97.09658,  13.74079,        97.11812,       13.76107,     39.45536,      +6.34770,      39.42633,       +6.35051,  3522532.46, -2115142.33,  5003133.34,      50.791219,       +3.662383,  108670.95,  405956.59,       0.00,             1825.83,   270.93,      0.00,           60457.33,   -178.89,   -103.11,         104.91,  +3.18,  +0.14
  1,     UK002C,       0,  0.076755, 2459439.510262345430,  39.41295,   6.12096,               97.27596,  13.58976,        97.28313,       13.59651,     39.41295,      +6.12096,      39.40356,       +6.12189,  3521769.63, -2115972.80,  5001383.28,      50.782989,       +3.646810,  107171.89,  404645.19,    2081.90,             3907.73,  -129.66,  51876.41,           60457.33,    -59.33,    -34.23,          34.91,  +2.15,  -0.89
  2,     UK002C,       0,  0.116943, 2459439.510262810625,  39.39666,   5.83598,               97.47149,  13.37688,        97.48755,       13.39197,     39.39666,      +5.83598,      39.37542,       +5.83807,  3520829.52, -2116996.26,  4999226.52,      50.772838,       +3.627655,  105324.91,  403040.65,    4647.62,             6473.45,   -49.90,  63842.74,           60457.33,   -132.36,    -76.32,          78.19,  +1.32,  -1.71
  3,     UK002C,       0,  0.157111, 2459439.510263275355,  39.34797,   5.54894,               97.69395,  13.18230,        97.69530,       13.18357,     39.34797,      +5.54894,      39.34681,       +5.54912,  3519880.04, -2118029.93,  4997048.24,      50.762577,       +3.608307,  103459.98,  401430.44,    7238.93,             9064.76,    56.69,  64511.82,           60457.33,    -11.05,     -6.38,           6.56,  +1.25,  -1.77
  4,     UK002C,       0,  0.197291, 2459439.510263740551,  39.33930,   5.27605,               97.87502,  12.97389,        97.88994,       12.98790,     39.33930,      +5.27605,      39.31995,       +5.27800,  3518995.98, -2118992.38,  4995020.03,      50.753015,       +3.590279,  101723.97,  399939.72,    9651.70,            11477.53,   -16.00,  60049.18,           60893.93,   -122.05,    -70.39,          72.66,  +0.94,  -2.07
  5,     UK002C,       0,  0.237459, 2459439.510264205281,  39.29012,   4.99502,               98.09343,  12.78403,        98.09280,       12.78344,     39.29012,      +4.99502,      39.29196,       +4.99494,  3518079.96, -2119989.63,  4992918.52,      50.743099,       +3.571603,   99925.65,  398405.14,   12151.69,            13977.52,    -0.73,  62238.25,           61210.67,      5.09,      2.94,           3.04,  +1.03,  -1.97
  6,     UK002C,       0,  0.277647, 2459439.510264670476,  39.27382,   4.69824,               98.29520,  12.56134,        98.30423,       12.56981,     39.27382,      +4.69824,      39.26277,       +4.69942,  3517131.09, -2121022.63,  4990741.64,      50.732819,       +3.552260,   98063.32,  396826.35,   14741.34,            16567.17,   102.96,  64438.34,           61669.78,    -73.36,    -42.32,          44.02,  +0.89,  -2.10
  7,     UK002C,       0,  0.317735, 2459439.510265134275,  39.20748,   4.52163,               98.46049,  12.46374,        98.43393,       12.43882,     39.20748,      +4.52163,      39.24471,       +4.51814,  3516552.58, -2121652.44,  4989414.45,      50.726547,       +3.540401,   96928.09,  395864.67,   16320.19,            18146.02,  -797.97,  39384.59,           60008.09,    215.10,    124.40,         129.47,  +3.21,  +0.22
  0,     UK002N,       0,  0.000000, 2459439.510261453688,  37.42751,   9.06234,               97.79919,  17.79314,        97.78548,       17.77958,     37.42751,      +9.06234,      37.44642,       +9.05999,  3523193.09, -2114423.12,  5004648.95,      50.798341,       +3.675877,  109969.42,  334390.67,       0.00,               22.84,   733.39,      0.00,           57795.36,     92.21,     59.76,          67.78,  +3.37,  +0.75
  1,     UK002N,       0,  0.040176, 2459439.510261918884,  37.41393,   8.85426,               97.94723,  17.63954,        97.94332,       17.63568,     37.41393,      +8.85426,      37.41949,       +8.85359,  3522602.57, -2115066.00,  5003294.20,      50.791975,       +3.663785,  108808.74,  333319.50,    1611.63,             1634.48,  -140.20,  40114.36,           57795.36,     26.21,     16.98,          19.32,  +2.41,  -0.20
  2,     UK002N,       0,  0.080456, 2459439.510262385011,  37.36518,   8.51452,               98.20989,  17.40501,        98.20260,       17.39781,     37.36518,      +8.51452,      37.37556,       +8.51327,  3521637.61, -2116116.52,  5001080.41,      50.781564,       +3.644130,  106912.50,  331585.64,    4245.18,             4268.03,     1.70,  65381.07,           57795.36,     48.62,     31.50,          36.04,  +1.11,  -1.49
  3,     UK002N,       0,  0.120740, 2459439.510262851138,  37.32592,   8.17037,               98.46716,  17.16087,        98.46362,       17.15738,     37.32592,      +8.17037,      37.33129,       +8.16976,  3520673.72, -2117165.88,  4998869.07,      50.771155,       +3.624493,  105018.85,  329865.67,    6875.82,             6898.67,   140.45,  65302.36,           57795.36,     23.45,     15.19,          17.47,  +0.49,  -2.10
  4,     UK002N,       0,  0.161000, 2459439.510263317265,  37.28031,   7.85633,               98.70929,  16.94390,        98.70218,       16.93690,     37.28031,      +7.85633,      37.29075,       +7.85511,  3519799.44, -2118117.69,  4996863.31,      50.761706,       +3.606664,  103301.67,  328315.09,    9261.91,             9284.75,    36.12,  59266.84,           59093.44,     46.92,     30.40,          35.12,  +0.40,  -2.18
  5,     UK002N,       0,  0.201276, 2459439.510263783392,  37.24707,   7.52297,               98.95348,  16.70394,        98.95338,       16.70384,     37.24707,      +7.52297,      37.24805,       +7.52295,  3518885.40, -2119112.77,  4994766.34,      50.751819,       +3.588029,  101506.85,  326705.36,   11756.49,            11779.33,    39.30,  61937.11,           59870.61,      0.67,      0.44,           0.51,  +0.31,  -2.26
  6,     UK002N,       0,  0.241540, 2459439.510264249519,  37.20154,   7.20143,               99.19937,  16.48056,        99.19636,       16.47761,     37.20154,      +7.20143,      37.20669,       +7.20091,  3518007.68, -2120068.32,  4992752.70,      50.742317,       +3.570126,   99783.77,  325169.76,   14151.94,            14174.78,   -55.91,  59493.64,           60107.68,     19.69,     12.75,          14.88,  +0.32,  -2.24
  7,     UK002N,       0,  0.281800, 2459439.510264715180,  37.14293,   6.88410,               99.45262,  16.26833,        99.43687,       16.25289,     37.14293,      +6.88410,      37.16570,       +6.88141,  3517144.96, -2121007.53,  4990773.48,      50.732969,       +3.552524,   98090.54,  323670.49,   16506.45,            16529.30,  -191.81,  58482.73,           60071.04,    102.43,     66.41,          77.79,  +0.56,  -1.99
  8,     UK002N,       1,  0.322020, 2459439.510265180841,  37.08226,   6.61048,               99.67879,  16.09137,        99.64484,       16.05810,     37.08226,      +6.61048,      37.13015,       +6.60466,  3516404.00, -2121814.19,  4989073.57,      50.724935,       +3.537381,   96636.56,  322389.46,   18528.68,            18551.52,  -657.52,  50279.08,           59401.91,    219.91,    142.75,         167.74,  +2.79,  +0.25
  0,     UK0032,       0,  0.071609, 2459439.510262310971,  11.56766, -10.58266,              132.62827,  15.22977,       132.63262,       15.23412,     11.56766,     -10.58266,      11.56217,      -10.58066,  3521806.83, -2115932.29,  5001468.64,      50.783390,       +3.647574,  107245.01,  370602.58,       0.00,             3806.18,    87.10,      0.00,           61288.76,    -21.56,    -32.62,          21.76,  +2.17,  -0.67
  1,     UK0032,       0,  0.111689, 2459439.510262775235,  11.45327, -10.90441,              132.88219,  14.99299,       132.88760,       14.99840,     11.45327,     -10.90441,      11.44652,      -10.90192,  3520969.27, -2116844.13,  4999547.11,      50.774348,       +3.630490,  105599.43,  369967.68,    2285.88,             6092.06,  -106.30,  57032.90,           61288.76,    -26.75,    -40.48,          27.05,  +1.02,  -1.82
  2,     UK0032,       0,  0.151773, 2459439.510263239034,  11.32527, -11.26056,              133.16361,  14.73101,       133.16938,       14.73677,     11.32527,     -11.26056,      11.31820,      -11.25790,  3520044.31, -2117851.10,  4997425.10,      50.764353,       +3.611639,  103782.59,  369282.63,    4810.25,             8616.44,   -61.45,  62977.14,           61288.76,    -28.50,    -43.12,          28.87,  +0.52,  -2.32
  3,     UK0032,       0,  0.191877, 2459439.510263703298,  11.21756, -11.62741,              133.43066,  14.45005,       133.45306,       14.47240,     11.21756,     -11.62741,      11.18837,      -11.61710,  3519114.28, -2118863.60,  4995291.43,      50.754295,       +3.592683,  101956.24,  368610.08,    7348.50,            11154.68,    -3.97,  63291.48,           61288.76,   -110.54,   -167.09,         112.11,  +0.65,  -2.18
  4,     UK0032,       0,  0.231937, 2459439.510264166631,  11.05478, -11.97895,              133.73953,  14.20631,       133.73855,       14.20534,     11.05478,     -11.97895,      11.05707,      -11.97940,  3518179.41, -2119881.35,  4993146.69,      50.744176,       +3.573626,  100120.88,  367950.59,    9899.91,            13706.09,    69.40,  63689.79,           62025.21,      4.81,      7.29,           4.90,  +0.54,  -2.29
  5,     UK0032,       0,  0.272041, 2459439.510264630895,  10.95928, -12.32831,              133.98569,  13.93473,       134.00571,       13.95466,     10.95928,     -12.32831,      10.93356,      -12.31906,  3517305.87, -2120832.36,  4991142.62,      50.734713,       +3.555807,   98406.31,  367348.83,   12283.98,            16090.16,   -27.29,  59447.25,           61867.24,    -98.43,   -148.82,         100.19,  +0.62,  -2.21
  6,     UK0032,       0,  0.312125, 2459439.510265094694,  10.83059, -12.68346,              134.26358,  13.67189,       134.28420,       13.69238,     10.83059,     -12.68346,      10.80420,      -12.67392,  3516396.07, -2121822.83,  4989055.37,      50.724849,       +3.537252,   96621.03,  366737.95,   14766.99,            18573.18,   -23.80,  61945.22,           61819.18,   -101.20,   -153.01,         103.18,  +2.17,  -0.65

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.