Orbital Analysis for matched events on 20210810_233341.190_UK

Summary for Event
-----------------
shower ID 7 PER
Lg 50.12° Bg 30.22° Vg 62.68km/s
mass 0.24879g, abs. mag -2.7
Path Details
------------
start 2.55° 50.92° 99.56km
end   2.12° 50.77° 71.12km

Orbit Details
-------------
Semimajor axis 6.29A.U., eccentricity 0.84, inclination 128.10°, Period 15.77Y, LA Sun 138.25°, last Perihelion 2021-08-07

Full details below
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Detailed report below graphs

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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: 2459437.481726738624
Time: 2021-08-10 23:33:41.190217 UTC


Plane intersections
-------------------
Intersection 1 - Stations: UK000F and UK002N
 Convergence angle = 4.87685 deg
 R.A. =  38.30514  Dec = +49.36078 deg

Best intersection: Stations UK000F and UK002N with Qconv = 4.88 deg


Least squares solution
----------------------
State vector (ECI, epoch of date):
 X =   2925168.64 +/- 1222.61 m
 Y =  -2861529.87 +/- 393.29 m
 Z =   5004989.01 +/- 80.88 m
 Vx =    35105.50 +/- 5541.73 m/s
 Vy =    25736.05 +/- 1871.88 m/s
 Vz =    46446.02 +/- 4791.52 m/s

State vector covariance matrix (X, Y, Z, Vx, Vy, Vz):
+1.015132e+06, +3.178268e+05, +7.982907e+03, +3.134078e+06, +1.179180e+06, +5.833965e+05
+3.178268e+05, +1.014373e+05, +3.974372e+03, +1.003968e+06, +3.803585e+05, +1.832332e+05
+7.982907e+03, +3.974372e+03, +5.216417e+03, +4.239734e+04, +1.650008e+04, +8.601165e+03
+3.134078e+06, +1.003968e+06, +4.239734e+04, +1.653326e+07, +6.246083e+06, +2.757421e+06
+1.179180e+06, +3.803585e+05, +1.650008e+04, +6.246083e+06, +2.370648e+06, +1.056723e+06
+5.833965e+05, +1.832332e+05, +8.601165e+03, +2.757421e+06, +1.056723e+06, +5.470824e+05

Timing offsets (from input data):
    UK000F: 0.000000 s
    UK002B: 0.000000 s
    UK002N: -0.001014 s

Reference point on the trajectory:
  Time: 2021-08-10 23:33:41.190217 UTC
  Lon     = ++2.547644 +/- 0.0159 deg
  Lat     = +50.916250 +/- 0.0041 deg
  Lat geo = +50.730690 +/- 0.0041 deg
  Ht      =   99556.67 +/- 390.94 m

  JD dynamic   = 2459437.482527479529 
  LST apparent = 315.6300805320 deg
Radiant (apparent in ECI which includes Earth's rotation, epoch of date):
  R.A.      =  36.24537 +/- 3.1416 deg
  Dec       = +46.85715 +/- 3.4976 deg
  Azimuth   =  61.03346 +/- 5.1793 deg
  Elevation = +39.54417 +/- 0.4628 deg
  Vavg      =  61.38187 +/- 2.9407 km/s
  Vinit     =  63.65511 +/- 3.3644 km/s
Radiant (apparent ground-fixed, epoch of date):
  R.A.      =  36.30898 +/- 3.1416 deg
  Dec       = +46.66439 +/- 3.4976 deg
  Azimuth   =  61.20125 +/- 5.1793 deg
  Elevation = +39.39491 +/- 0.4628 deg
  Vavg      =  61.58357 +/- 2.9407 km/s
  Vinit     =  63.85681 +/- 3.3644 km/s
Radiant (geocentric, J2000):
  R.A.   =  36.38493 +/- 3.2610 deg
  Dec    = +46.51365 +/- 3.4769 deg
  Vg     =  62.67906 +/- 3.4284 km/s
  Vinf   =  63.65511 +/- 3.3644 km/s
  Zc     =  50.54589 +/- 0.4504 deg
  Zg     =  50.96387 +/- 0.3983 deg
Radiant (ecliptic geocentric, J2000):
  Lg     =  50.12275 +/- 3.7500 deg
  Bg     = +30.21861 +/- 2.5393 deg
  Vh     =  40.11770 +/- 1.7437 km/s
Radiant (ecliptic heliocentric, J2000):
  Lh     =  51.66429 +/- 13.0411 deg
  Bh     = +51.84744 +/- 4.6594 deg
  Vh_x   = -15.37211 +/- 4.8330 km/s
  Vh_y   = -19.43954 +/- 1.8257 km/s
  Vh_z   = -31.54730 +/- 0.3236 km/s
Orbit:
  La Sun = 138.251119 +/- 0.0000 deg
  a      =   6.289706 +/- 2.5482 AU
  e      =   0.839088 +/- 0.1324
  i      = 128.103090 +/- 6.5397 deg
  peri   = 175.382500 +/- 14.9858 deg
  node   = 138.248782 +/- 0.0005 deg
  Pi     = 313.631282 +/- 14.9853 deg
  q      =   1.012088 +/- 0.0403 AU
  f      =   4.612817 +/- 14.9861 deg
  M      =   0.219773 +/- 6.2647 deg
  Q      =  11.567324 +/- 5.0808 AU
  n      =   0.062483 +/- 0.1335 deg/day
  T      =  15.774156 +/- 10.4428 years
  Last perihelion JD = 2459433.965170 (2021-08-07 11:09:50.678644) +/- 11.6513 days
  Tj     =   0.089350 +/- 0.8923
Shower association:
  IAU No.  =    7
  IAU code =  PER

Orbit covariance matrix:
             e     ,     q (AU)   ,      Tp (JD) ,   node (rad) ,   peri (rad) ,    i (rad)
e   , +2.515262e-02, +2.748770e-03, +1.330372e+00, -1.176400e-06, +2.808592e-02, +1.301544e-02
q   , +2.748770e-03, +6.051031e-04, +2.179193e-01, -1.785044e-07, +4.746540e-03, +2.091320e-03
Tp  , +1.330372e+00, +2.179193e-01, +8.864879e+01, -7.432022e-05, +1.900545e+00, +8.498924e-01
node, -1.176400e-06, -1.785044e-07, -7.432022e-05, +6.353605e-11, -1.592412e-06, -7.217813e-07
peri, +2.808592e-02, +4.746540e-03, +1.900545e+00, -1.592412e-06, +4.084093e-02, +1.825659e-02
i   , +1.301544e-02, +2.091320e-03, +8.498924e-01, -7.217813e-07, +1.825659e-02, +8.239091e-03

Jacchia fit on lag = -|a1|*exp(|a2|*t):
 a1 = 35.238050
 a2 = 5.453306

Mean time residuals from time vs. length:
  Station with reference time: UK000F
  Avg. res. = 3.879e-06 s
  Stddev    = 1.97e-03 s

Begin point on the trajectory:
  Lon =     2.547751 +/- 0.0160 deg
  Lat =    50.916288 +/- 0.0040 deg
  Ht  = 99563.89 +/- 396.74 m
End point on the trajectory:
  Lon =     2.120752 +/- 0.0324 deg
  Lat =    50.766708 +/- 0.0062 deg
  Ht  = 71117.15 +/- 877.39 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,   False,    -1.306160,    51.883100,   80.00,   0.549011,  16.895238,    99563.89,    83598.28,          0.023565,    121.84,     16.68,              53.76, 1.0000,    True,    True, {"ff_name": "FF_UK000F_20210810_233339_226_0284416.fits"}
    UK002B,    True,    -1.367130,    50.815550,   22.00,   0.000000,   0.000000,    85355.08,    80895.44,          1.508455,       nan,       nan,              35.32, 0.0000,    True,    True, {"ff_name": "FF_UK002B_20210810_233342_378_0301568.fits"}
    UK002N,   False,    -0.727590,    51.263100,   57.00,  40.420225,   5.249584,    95812.29,    71117.15,          0.011957,     47.47,     10.66,              41.98, 1.0000,    True,    True, {"ff_name": "FF_UK002N_20210810_233333_417_0302080.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,       0,  0.000000, 2459437.481726738624,  15.17777,   1.89448,              110.36074,  17.59165,       110.34013,       17.56408,     15.17777,      +1.89448,      15.20977,       +1.88338,  2925174.90, -2861525.28,  5004997.29,      50.916288,       +2.547751,   99563.89,  307672.71,       0.00,               11.35,    55.41,      0.00,           61622.08,     24.48,    180.15,         121.88,  +3.08,  +0.64
  1,     UK000F,       0,  0.040300, 2459437.481727205217,  15.10527,   1.52042,              110.64953,  17.32844,       110.66248,       17.34570,     15.10527,      +1.52042,      15.08536,       +1.52736,  2923694.71, -2862610.42,  5003038.94,      50.907411,       +2.522227,   97855.42,  305892.50,    2683.96,             2672.61,   151.37,  66599.55,           61622.08,    -15.40,   -112.31,          76.44,  +1.77,  -0.66
  2,     UK000F,       0,  0.080520, 2459437.481727670413,  14.96810,   1.22519,              110.94521,  17.16651,       110.93875,       17.15791,     14.96810,      +1.22519,      14.97844,       +1.22173,  2922437.51, -2863532.08,  5001375.61,      50.899864,       +2.500520,   96404.83,  304389.46,    4963.58,             4952.24,  -129.21,  56678.81,           61622.08,      7.60,     55.73,          38.11,  +1.01,  -1.41
  3,     UK000F,       0,  0.120792, 2459437.481728136539,  14.85981,   0.87595,              111.24820,  16.94338,       111.24975,       16.94544,     14.85981,      +0.87595,      14.85792,       +0.87678,  2921033.37, -2864561.46,  4999517.88,      50.891426,       +2.476293,   94785.25,  302723.54,    7509.64,             7498.29,  -146.68,  63221.49,           61622.08,     -1.81,    -13.28,           9.13,  +0.93,  -1.48
  4,     UK000F,       0,  0.161080, 2459437.481728603132,  14.69980,   0.49404,              111.61429,  16.72276,       111.60052,       16.70451,     14.69980,      +0.49404,      14.72175,       +0.48666,  2919463.68, -2865712.21,  4997441.12,      50.881982,       +2.449224,   92975.41,  300877.16,   10355.87,            10344.53,   135.02,  70647.17,           63423.64,     15.94,    117.16,          81.06,  +0.71,  -1.68
  5,     UK000F,       0,  0.201356, 2459437.481729069259,  14.61662,   0.14468,              111.89442,  16.48421,       111.90321,       16.49582,     14.61662,      +0.14468,      14.60390,       +0.14938,  2918121.90, -2866695.88,  4995665.89,      50.873900,       +2.426058,   91428.92,  299309.91,   12788.86,            12777.51,     4.23,  60407.83,           63507.21,    -10.17,    -74.29,          51.67,  +0.35,  -2.03
  6,     UK000F,       0,  0.241644, 2459437.481729535386,  14.52033,  -0.22177,              112.19523,  16.23875,       112.22249,       16.27467,     14.52033,      -0.22177,      14.47933,       -0.20725,  2916718.25, -2867724.91,  4993808.79,      50.865436,       +2.401829,   89811.68,  297683.45,   15334.04,            15322.70,   -15.12,  63174.79,           63501.42,    -31.45,   -228.75,         159.99,  +0.40,  -1.97
  7,     UK000F,       0,  0.281888, 2459437.481730001047,  14.35936,  -0.55509,              112.53092,  16.05697,       112.53250,       16.05906,     14.35936,      -0.55509,      14.35809,       -0.55424,  2915367.01, -2868715.51,  4992021.05,      50.857280,       +2.378495,   88255.37,  296129.70,   17784.18,            17772.84,  -126.72,  60882.09,           63280.88,     -1.81,    -13.23,           9.30,  +0.53,  -1.83
  8,     UK000F,       0,  0.322176, 2459437.481730467640,  14.22407,  -0.93222,              112.86993,  15.82402,       112.86953,       15.82350,     14.22407,      -0.93222,      14.22601,       -0.93243,  2913910.18, -2869783.51,  4990093.61,      50.848477,       +2.353347,   86578.08,  294469.13,   20425.77,            20414.42,   -49.67,  65567.53,           63330.47,      0.44,      3.24,           2.29,  +0.38,  -1.97
  9,     UK000F,       0,  0.362432, 2459437.481730933301,  14.11890,  -1.26976,              113.15906,  15.60601,       113.16624,       15.61542,     14.11890,      -1.26976,      14.10938,       -1.26594,  2912638.87, -2870715.52,  4988411.61,      50.840787,       +2.331377,   85114.86,  293030.60,   22730.98,            22719.63,  -306.96,  57263.82,           63024.93,     -8.09,    -59.15,          42.02,  +0.43,  -1.90
 10,     UK000F,       0,  0.402712, 2459437.481731399428,  14.02292,  -1.62812,              113.45194,  15.36526,       113.47626,       15.39706,     14.02292,      -1.62812,      13.98725,       -1.61519,  2911320.75, -2871681.84,  4986667.68,      50.832806,       +2.308602,   83598.28,  291551.35,   25121.06,            25109.72,  -480.90,  59336.76,           62690.58,    -27.35,   -199.20,         142.25,  +0.94,  -1.38
  0,     UK002B,       1,  0.271421, 2459437.481729879975,  30.99859,  14.43348,               88.92240,  17.87749,        87.91737,       16.83032,     30.99859,     +14.43348,      32.45520,      +14.26477,  2912847.40, -2870562.65,  4988687.50,      50.842049,       +2.335334,   85355.08,  276086.91,       0.00,            22341.52,  5108.22,      0.00,           58262.80,   2983.50,   6157.65,        5112.46,  +1.23,  -0.98
  1,     UK002B,       1,  0.311513, 2459437.481730344240,  30.92410,  14.12266,               89.19268,  17.68884,        88.15473,       16.60710,     30.92410,     +14.12266,      32.42731,      +13.94734,  2911292.98, -2871702.21,  4986630.94,      50.832637,       +2.308507,   83566.64,  273709.19,    2818.55,            25160.08,  5374.72,  70302.16,           58262.80,   3049.91,   6311.82,        5283.30,  +1.21,  -0.98
  2,     UK002B,       1,  0.351581, 2459437.481730808038,  30.85429,  13.87263,               89.41742,  17.54318,        88.34650,       16.42635,     30.85429,     +13.87263,      32.40471,      +13.69046,  2910053.97, -2872610.53,  4984991.69,      50.825127,       +2.287086,   82141.59,  271817.81,    5065.18,            27406.70,  5070.81,  56070.26,           58262.80,   3120.09,   6475.69,        5455.25,  +0.98,  -1.19
  3,     UK002B,       1,  0.391589, 2459437.481731270906,  30.72579,  13.66167,               89.66071,  17.46414,        88.51615,       16.26613,     30.72579,     +13.66167,      32.38466,      +13.46289,  2908970.21, -2873405.04,  4983557.82,      50.818553,       +2.268327,   80895.44,  270166.57,    7030.32,            29371.84,  4489.24,  49118.73,           58262.80,   3301.68,   6904.20,        5843.66,  +2.88,  +0.72
  0,     UK002N,       0,  0.093122, 2459437.481727816164,  21.91899,  11.23192,               98.98054,  21.48354,        98.98515,       21.48970,     21.91899,     +11.23192,      21.91203,      +11.23399,  2921923.85, -2863908.65,  5000696.02,      50.896778,       +2.491667,   95812.29,  249994.65,       0.00,             5883.62,    -0.01,      0.00,           62624.38,     -7.18,    -31.94,          27.01,  +2.60,  +0.61
  1,     UK002N,       0,  0.133394, 2459437.481728282291,  21.81317,  10.88410,               99.30234,  21.27866,        99.30560,       21.28301,     21.81317,     +10.88410,      21.80853,      +10.88557,  2920504.32, -2864949.32,  4998817.92,      50.888244,       +2.467174,   94175.17,  247950.26,    2573.97,             8457.60,    10.45,  63914.74,           62624.38,     -5.04,    -22.43,          19.13,  +1.77,  -0.20
  2,     UK002N,       0,  0.173662, 2459437.481728748418,  21.69355,  10.53769,               99.63378,  21.08296,        99.62730,       21.07434,     21.69355,     +10.53769,      21.70457,      +10.53477,  2919098.46, -2865979.96,  4996957.91,      50.879783,       +2.442912,   92554.41,  245935.42,    5123.15,            11006.77,    -3.64,  63305.13,           62624.38,      9.90,     44.11,          37.91,  +1.58,  -0.37
  3,     UK002N,       0,  0.213934, 2459437.481729214545,  21.59464,  10.19687,               99.94379,  20.87840,        99.93850,       20.87139,     21.59464,     +10.19687,      21.60391,      +10.19449,  2917756.40, -2866963.83,  4995182.31,      50.871697,       +2.419741,   91007.74,  244021.00,    7556.64,            13440.26,  -133.67,  60426.47,           62624.38,      7.99,     35.63,          30.87,  +1.00,  -0.94
  4,     UK002N,       0,  0.254238, 2459437.481729681138,  21.47820,   9.81035,              100.29804,  20.64857,       100.29137,       20.63976,     21.47820,      +9.81035,      21.48979,       +9.80737,  2916255.04, -2868064.49,  4993195.95,      50.862641,       +2.393835,   89278.12,  241891.87,   10278.98,            16162.61,    23.12,  67545.19,           63412.26,      9.98,     44.50,          38.89,  +0.39,  -1.53
  5,     UK002N,       0,  0.294522, 2459437.481730147265,  21.40620,   9.45841,              100.59184,  20.41791,       100.60380,       20.43366,     21.40620,      +9.45841,      21.38859,       +9.46373,  2914943.98, -2869025.63,  4991461.36,      50.854725,       +2.371189,   87768.26,  240041.18,   12656.27,            18539.89,  -163.88,  59013.19,           63008.70,    -17.78,    -79.00,          69.58,  +0.16,  -1.74
  6,     UK002N,       0,  0.334794, 2459437.481730613392,  21.27788,   9.10601,              100.93156,  20.22111,       100.92908,       20.21786,     21.27788,      +9.10601,      21.28317,       +9.10491,  2913596.30, -2870013.62,  4989678.33,      50.846579,       +2.347912,   86216.76,  238149.02,   15099.94,            20983.57,  -283.72,  60679.23,           62615.07,      3.64,     16.20,          14.38,  -0.02,  -1.90
  7,     UK002N,       0,  0.375114, 2459437.481731079984,  21.18104,   8.70208,              101.27868,  19.96413,       101.28894,       19.97757,     21.18104,      +8.70208,      21.16652,       +8.70663,  2912125.31, -2871092.01,  4987732.15,      50.837678,       +2.322517,   84523.93,  236096.46,   17767.22,            23650.84,  -183.02,  66152.58,           62746.15,    -14.96,    -66.49,          59.54,  -0.07,  -1.94
  8,     UK002N,       0,  0.415402, 2459437.481731546111,  21.07123,   8.33756,              101.60960,  19.74552,       101.61812,       19.75664,     21.07123,      +8.33756,      21.05964,       +8.34133,  2910798.16, -2872064.96,  4985976.28,      50.829639,       +2.299585,   82997.16,  234254.33,   20173.67,            26057.30,  -341.10,  59731.42,           62606.29,    -12.29,    -54.67,          49.34,  -0.23,  -2.08
  9,     UK002N,       0,  0.455674, 2459437.481732012238,  20.95762,   7.98285,              101.93647,  19.53648,       101.93919,       19.54003,     20.95762,      +7.98285,      20.95527,       +7.98405,  2909520.03, -2873001.96,  4984285.26,      50.821889,       +2.277492,   81527.27,  232489.74,   22491.25,            28374.87,  -587.05,  57547.99,           62259.29,     -3.90,    -17.35,          15.78,  -0.20,  -2.03
 10,     UK002N,       0,  0.495974, 2459437.481732478831,  20.85651,   7.60422,              102.26794,  19.30055,       102.27625,       19.31135,     20.85651,      +7.60422,      20.84563,       +7.60788,  2908195.05, -2873973.31,  4982532.26,      50.813847,       +2.254592,   80004.02,  230671.37,   24893.76,            30777.39,  -749.83,  59615.82,           61949.80,    -11.79,    -52.44,          48.06,  -0.35,  -2.16
 11,     UK002N,       0,  0.536282, 2459437.481732945424,  20.70107,   7.19914,              102.66076,  19.07646,       102.64680,       19.05834,     20.70107,      +7.19914,      20.72503,       +7.19298,  2906757.59, -2875027.12,  4980630.44,      50.805112,       +2.229759,   78352.05,  228711.92,   27500.25,            33383.87,  -709.16,  64664.09,           61875.72,     19.54,     87.32,          80.69,  -0.33,  -2.13
 12,     UK002N,       0,  0.576594, 2459437.481733412016,  20.60995,   6.81000,              102.98910,  18.82512,       102.98824,       18.82401,     20.60995,      +6.81000,      20.61370,       +6.80963,  2905450.91, -2875985.06,  4978901.64,      50.797164,       +2.207168,   76850.90,  226941.21,   29869.59,            35753.21,  -905.88,  58775.16,           61728.66,      1.19,      5.32,           4.96,  -0.53,  -2.31
 13,     UK002N,       0,  0.616906, 2459437.481733878609,  20.50224,   6.41338,              103.33516,  18.57751,       103.33873,       18.58212,     20.50224,      +6.41338,      20.49928,       +6.41495,  2904126.63, -2876955.90,  4977149.56,      50.789101,       +2.184271,   75330.04,  225158.19,   32270.85,            38154.47, -1070.69,  59566.84,           61574.42,     -4.92,    -21.91,          20.57,  -0.53,  -2.29
 14,     UK002N,       0,  0.657230, 2459437.481734345201,  20.38190,   5.99727,              103.70335,  18.32163,       103.70706,       18.32640,     20.38190,      +5.99727,      20.37892,       +5.99889,  2902753.02, -2877962.90,  4975332.22,      50.780729,       +2.160524,   73753.08,  223321.58,   34761.55,            40645.18, -1146.81,  61767.30,           61479.00,     -5.06,    -22.54,          21.34,  -0.44,  -2.18
 15,     UK002N,       0,  0.697546, 2459437.481734811794,  20.26768,   5.59215,              104.05846,  18.07019,       104.06399,       18.07727,     20.26768,      +5.59215,      20.26207,       +5.59456,  2901439.39, -2878925.93,  4973594.24,      50.772714,       +2.137805,   72245.51,  221576.82,   37143.48,            43027.10, -1331.20,  59081.45,           61362.23,     -7.47,    -33.28,          31.75,  -0.21,  -1.94
 16,     UK002N,       0,  0.737774, 2459437.481735277455,  20.15215,   5.29284,              104.34611,  17.90295,       104.33444,       17.88800,     20.15215,      +5.29284,      20.17321,       +5.28774,  2900455.97, -2879646.88,  4972293.13,      50.766708,       +2.120752,   71117.15,  220275.83,   38926.68,            44810.30, -2108.72,  44327.27,           60948.66,     15.64,     69.86,          67.03,  +2.24,  +0.53

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.