Orbital Analysis for matched events on 20210810_213222.057_UK

Summary for Event
-----------------
shower ID 7 PER
Lg 60.86° Bg 40.42° Vg 58.93km/s
mass 0.00729g, abs. mag 0.6
Path Details
------------
start -2.65° 51.56° 108.07km
end   -2.74° 51.46° 100.77km

Orbit Details
-------------
Semimajor axis -114.56A.U., eccentricity 1.01, inclination 110.62°, Period 1000000000.00Y, LA Sun 138.17°, 

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: 2459437.397477520630
Time: 2021-08-10 21:32:22.097613 UTC


Plane intersections
-------------------
Intersection 1 - Stations: UK0006 and UK000S
 Convergence angle = 25.53988 deg
 R.A. =  42.93585  Dec = +59.47420 deg

Best intersection: Stations UK0006 and UK000S with Qconv = 25.54 deg


Least squares solution
----------------------
State vector (ECI, epoch of date):
 X =    703637.22 +/- 39.31 m
 Y =  -3978456.55 +/- 21.36 m
 Z =   5058859.32 +/- 101.76 m
 Vx =    21966.30 +/- 465.33 m/s
 Vy =    20683.29 +/- 339.45 m/s
 Vz =    51824.16 +/- 452.21 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):
    UK0006: 0.000470 s
    UK000S: 0.000000 s
    UK001Z: 0.000000 s
    UK0020: 0.000000 s

Reference point on the trajectory:
  Time: 2021-08-10 21:32:22.097613 UTC
  Lon     = +-2.640127 +/- 0.0006 deg
  Lat     = +51.572147 +/- 0.0005 deg
  Lat geo = +51.387783 +/- 0.0005 deg
  Ht      =  109095.74 +/- 87.04 m

  JD dynamic   = 2459437.398278722540 
  LST apparent = 280.0297194303 deg
Radiant (apparent in ECI which includes Earth's rotation, epoch of date):
  R.A.      =  43.27691 +/- 0.2040 deg
  Dec       = +59.79250 +/- 0.4987 deg
  Azimuth   =  29.18921 +/- 0.4212 deg
  Elevation = +30.36913 +/- 0.3578 deg
  Vavg      =  57.03197 +/- 0.1410 km/s
  Vinit     =  59.96716 +/- 0.2228 km/s
Radiant (apparent ground-fixed, epoch of date):
  R.A.      =  42.97266 +/- 0.2040 deg
  Dec       = +59.58912 +/- 0.4987 deg
  Azimuth   =  29.47325 +/- 0.4212 deg
  Elevation = +30.29956 +/- 0.3578 deg
  Vavg      =  57.15653 +/- 0.1410 km/s
  Vinit     =  60.09172 +/- 0.2228 km/s
Radiant (geocentric, J2000):
  R.A.   =  43.53943 +/- 0.2026 deg
  Dec    = +59.24645 +/- 0.5045 deg
  Vg     =  58.93156 +/- 0.2267 km/s
  Vinf   =  59.96716 +/- 0.2228 km/s
  Zc     =  59.79186 +/- 0.3571 deg
  Zg     =  60.36569 +/- 0.3635 deg
Radiant (ecliptic geocentric, J2000):
  Lg     =  60.86436 +/- 0.3530 deg
  Bg     = +40.41847 +/- 0.4401 deg
  Vh     =  41.93095 +/- 0.3919 km/s
Radiant (ecliptic heliocentric, J2000):
  Lh     =  81.81152 +/- 1.0778 deg
  Bh     = +65.68039 +/- 0.3708 deg
  Vh_x   =  -2.45952 +/- 0.3381 km/s
  Vh_y   = -17.09221 +/- 0.1492 km/s
  Vh_z   = -38.21010 +/- 0.4451 km/s
Orbit:
  La Sun = 138.170271 +/- -0.0000 deg
  a      = -114.564925 +/- 61.1548 AU
  e      =   1.008389 +/- 0.0361
  i      = 110.617996 +/- 0.5508 deg
  peri   = 153.738415 +/- 0.2450 deg
  node   = 138.168527 +/- 0.0000 deg
  Pi     = 291.906942 +/- 0.2450 deg
  q      =   0.961081 +/- 0.0010 AU
  f      =  26.257449 +/- 0.2450 deg
  M      =        nan +/- nan deg
  Q      = -230.090931 +/- 122.3099 AU
  n      =   0.000804 +/- 0.0140 deg/day
  T      = 1000000000.000000 +/- 0.0000 years
  Last perihelion JD = NaN 
  Tj     =  -0.474334 +/- 0.1906
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: UK000S
  Avg. res. = 4.542e-06 s
  Stddev    = 2.13e-03 s

Begin point on the trajectory:
  Lon =    -2.652205 +/- 0.0005 deg
  Lat =    51.558670 +/- 0.0004 deg
  Ht  = 108072.49 +/- 67.15 m
End point on the trajectory:
  Lon =    -2.739524 +/- 0.0008 deg
  Lat =    51.462180 +/- 0.0001 deg
  Ht  = 100771.82 +/- 34.56 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
    UK0006,   False,    -1.306160,    51.883100,   80.00,   0.000002,  64.220512,   106662.79,   100771.82,          0.007969,      0.71,     20.66,              93.60, 1.0000,    True,    True, {"ff_name": "FF_UK0006_20210810_213212_731_0111616.fits"}
    UK000S,   False,    -1.778230,    50.857470,   24.00,   0.000000,   0.000000,   108072.49,   101225.24,          0.007631,      8.72,     17.05,              52.72, 1.0000,    True,    True, {"ff_name": "FF_UK000S_20210810_213221_978_0115200.fits"}
    UK001Z,    True,    -2.949729,    50.877448,   82.00,   0.000000,   0.000000,   111367.51,   100073.62,          0.064509,       nan,       nan,              25.12, 0.0000,    True,    True, {"ff_name": "FF_UK001Z_20210810_213219_077_0109824.fits"}
    UK0020,    True,    -3.515726,    50.691998,   17.00,   0.000000,   0.000000,   107278.71,   100671.05,          0.182935,       nan,       nan,              13.25, 0.0000,    True,    True, {"ff_name": "FF_UK0020_20210810_213218_878_0107264.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,     UK0006,       0,  0.096183, 2459437.397478628438, 236.05292,  23.86132,              248.48503,  45.66440,       248.48067,       45.66634,    236.05292,     +23.86132,     236.05724,      +23.86092,   701873.61, -3980117.15,  5054698.51,      51.540085,       -2.669081,  106662.79,  147862.24,       0.00,             4814.59,    -2.45,      0.00,           61833.87,     -9.31,     -0.32,          13.00,  +1.46,  +0.61
  1,     UK0006,       0,  0.136959, 2459437.397479100619, 235.94399,  22.98213,              247.81570,  44.91524,       247.81357,       44.91618,    235.94399,     +22.98213,     235.94648,      +22.98193,   701033.19, -3980908.49,  5052715.74,      51.524796,       -2.682931,  105504.33,  148114.95,    2294.32,             7108.91,  -153.35,  56266.46,           61833.87,     -4.58,     -0.16,           6.39,  +0.76,  -0.09
  2,     UK0006,       0,  0.177879, 2459437.397479574196, 235.83367,  21.93684,              247.02470,  44.02954,       247.04345,       44.02129,    235.83367,     +21.93684,     235.81748,      +21.93858,   700031.45, -3981851.71,  5050352.39,      51.506562,       -2.699401,  104124.30,  148460.66,    5029.02,             9843.61,   127.49,  66830.48,           61833.87,     40.92,      1.41,          56.89,  +0.54,  -0.32
  3,     UK0006,       0,  0.218719, 2459437.397480046842, 235.70681,  20.99631,              246.36258,  43.21175,       246.36848,       43.20916,    235.70681,     +20.99631,     235.70238,      +20.99686,   699123.19, -3982706.93,  5048209.56,      51.490021,       -2.714346,  102873.76,  148817.72,    7508.55,            12323.14,   157.96,  60713.17,           61833.87,     13.03,      0.45,          18.07,  +0.65,  -0.21
  4,     UK0006,       0,  0.259467, 2459437.397480518557, 235.60832,  20.15684,              245.77289,  42.48627,       245.78246,       42.48210,    235.60832,     +20.15684,     235.60071,      +20.15773,   698310.15, -3983472.47,  5046291.40,      51.475208,       -2.727736,  101754.91,  149172.53,    9728.10,            14542.68,   -66.03,  54470.11,           60419.48,     21.34,      0.74,          29.52,  +0.15,  -0.72
  5,     UK0006,       0,  0.300127, 2459437.397480988875, 235.50599,  19.42386,              245.28663,  41.84081,       245.28111,       41.84321,    235.50599,     +19.42386,     235.51226,      +19.42335,   697595.45, -3984145.43,  5044605.24,      51.462180,       -2.739524,  100771.82,  149511.98,   11679.20,            16493.79,  -553.19,  47985.88,           58246.61,    -12.41,     -0.43,          17.14,  +2.13,  +1.26
  0,     UK000S,       1,  0.000000, 2459437.397477520630, 195.84391,  65.72261,              323.21749,  46.83581,       323.21193,       46.87044,    195.84391,     +65.72261,     195.92500,      +65.73272,   703646.89, -3978447.44,  5058882.15,      51.572323,       -2.639803,  109109.07,  148387.77,       0.00,               26.41,   977.17,      0.00,           52092.46,    -80.28,    -41.15,         125.40,  +4.64,  +3.78
  1,     UK000S,       0,  0.039812, 2459437.397477981634, 196.36285,  65.11911,              322.28277,  46.79558,       322.28279,       46.79546,    196.36285,     +65.11911,     196.36273,      +65.11908,   702895.72, -3979154.74,  5057109.92,      51.558670,       -2.652205,  108072.49,  147162.74,    2050.69,             2024.28,   587.63,  51509.33,           52092.46,      0.28,      0.15,           0.45,  +3.01,  +2.17
  2,     UK000S,       0,  0.079652, 2459437.397478442639, 196.78643,  64.51267,              321.36612,  46.71878,       321.36706,       46.71394,    196.78643,     +64.51267,     196.77586,      +64.51131,   702165.34, -3979842.46,  5055386.77,      51.545391,       -2.664264,  107065.06,  145989.66,    4044.59,             4018.18,   192.44,  50047.76,           52092.46,     11.08,      5.67,          17.59,  +1.98,  +1.16
  3,     UK000S,       0,  0.119468, 2459437.397478903178, 197.25518,  63.83115,              320.33729,  46.63023,       320.34080,       46.61375,    197.25518,     +63.83115,     197.21933,      +63.82665,   701357.29, -3980603.32,  5053480.37,      51.530693,       -2.677585,  105951.01,  144712.36,    6250.54,             6224.13,    10.74,  55403.66,           52092.46,     37.46,     19.15,          59.96,  +1.88,  +1.08
  4,     UK000S,       0,  0.159292, 2459437.397479364183, 197.68275,  63.07342,              319.21819,  46.49379,       319.21830,       46.49332,    197.68275,     +63.07342,     197.68240,      +63.07329,   700485.53, -3981424.15,  5051423.68,      51.514828,       -2.691938,  104749.76,  143359.43,    8630.40,             8603.99,     2.46,  59759.30,           53888.69,      1.07,      0.55,           1.73,  +1.22,  +0.44
  5,     UK000S,       0,  0.199112, 2459437.397479825187, 198.10552,  62.32089,              318.10858,  46.35632,       318.10697,       46.36264,    198.10552,     +62.32089,     198.11970,      +62.32254,   699634.41, -3982225.56,  5049415.67,      51.499332,       -2.705951,  103577.54,  142064.83,   10953.93,            10927.52,   -61.90,  58350.80,           55039.29,    -14.16,     -7.25,          23.10,  +0.98,  +0.22
  6,     UK000S,       0,  0.238912, 2459437.397480285726, 198.55044,  61.51768,              316.92753,  46.20549,       316.92592,       46.21131,    198.55044,     +61.51768,     198.56346,      +61.51916,   698741.68, -3983066.15,  5047309.48,      51.483071,       -2.720636,  102348.68,  140735.27,   13391.05,            13364.64,   -11.47,  61234.19,           56113.54,    -12.95,     -6.63,          21.32,  +0.90,  +0.16
  7,     UK000S,       0,  0.278724, 2459437.397480746731, 198.94439,  60.76815,              315.83338,  46.05394,       315.83179,       46.05930,    198.94439,     +60.76815,     198.95641,      +60.76948,   697925.12, -3983835.02,  5045383.01,      51.468190,       -2.734078,  101225.24,  139545.95,   15620.23,            15593.82,  -169.71,  55992.62,           56551.16,    -11.86,     -6.07,          19.69,  +1.17,  +0.45
  0,     UK001Z,       1, -0.070840, 2459437.397476700600, 355.05367,  79.87463,               16.16801,  52.35415,        16.13741,       52.34448,    355.05367,     +79.87463,     355.10479,      +79.89364,   705282.34, -3976907.51,  5062740.59,      51.602026,       -2.612857,  111367.51,  139854.48,       0.00,             4491.12,  9689.98,     -0.00,           58022.73,     51.16,     -4.62,          75.76,  +5.02,  +4.29
  1,     UK001Z,       1, -0.031080, 2459437.397477160674, 353.38852,  79.97637,               15.97729,  52.64000,        15.89910,       52.61532,    353.38852,     +79.97637,     353.51244,      +80.02534,   704635.08, -3977516.97,  5061213.53,      51.590274,       -2.623572,  110473.41,  138247.07,    1767.01,             2724.12,  5538.68,  44441.80,           58022.73,    128.53,    -11.75,         192.56,  +3.25,  +2.55
  2,     UK001Z,       1,  0.008552, 2459437.397477619816, 350.72395,  80.16200,               15.60206,  53.08073,        15.51155,       53.05210,    350.72395,     +80.16200,     350.85397,      +80.21933,   703618.23, -3978474.43,  5058814.53,      51.571802,       -2.640306,  109069.51,  135731.19,    4542.95,               51.83,   489.78,  70043.09,           58022.73,    145.00,    -13.28,         221.27,  +1.94,  +1.28
  3,     UK001Z,       1,  0.048264, 2459437.397478079423, 348.51920,  80.32996,               15.23816,  53.42759,        15.18511,       53.41070,    348.51920,     +80.32996,     348.58891,      +80.36386,   702808.94, -3979236.46,  5056905.19,      51.557093,       -2.653653,  107952.76,  133735.93,    6752.31,             2261.19,   317.72,  55634.47,           58022.73,     83.32,     -7.53,         129.03,  +1.98,  +1.35
  4,     UK001Z,       1,  0.087944, 2459437.397478538565, 346.07944,  80.44104,               14.92928,  53.80809,        14.84199,       53.78030,    346.07944,     +80.44104,     346.18058,      +80.49719,   701997.26, -3980000.73,  5054990.23,      51.542334,       -2.667035,  106833.28,  131741.82,    8968.16,             4477.04,   154.07,  55843.05,           57748.53,    134.13,    -12.22,         210.87,  +1.31,  +0.71
  5,     UK001Z,       1,  0.127612, 2459437.397478997707, 343.38787,  80.57806,               14.52895,  54.20851,        14.45794,       54.18579,    343.38787,     +80.57806,     343.45812,      +80.62402,   701131.52, -3980815.90,  5052947.73,      51.526585,       -2.681293,  105639.85,  129623.14,   11331.59,             6840.47,   138.73,  59580.31,           57931.69,    106.68,     -9.65,         170.46,  +1.48,  +0.92
  6,     UK001Z,       1,  0.167268, 2459437.397479456384, 340.61956,  80.65507,               14.18458,  54.62015,        14.07180,       54.58404,    340.61956,     +80.65507,     340.70947,      +80.72830,   700305.48, -3981593.69,  5050998.88,      51.511551,       -2.694901,  104501.72,  127609.70,   13586.66,             9095.53,    15.73,  56865.59,           57883.00,    165.55,    -15.12,         268.70,  +1.18,  +0.65
  7,     UK001Z,       1,  0.206920, 2459437.397479915526, 337.69344,  80.74940,               13.75759,  55.03470,        13.65687,       55.00229,    337.69344,     +80.74940,     337.75376,      +80.81492,   699462.35, -3982387.57,  5049009.74,      51.496199,       -2.708782,  103340.65,  125563.29,   15888.35,            11397.23,   -60.39,  58047.44,           57876.39,    144.51,    -13.13,         238.36,  +1.09,  +0.60
  8,     UK001Z,       1,  0.246552, 2459437.397480374202, 334.58138,  80.80917,               13.32282,  55.47148,        13.21516,       55.43671,    334.58138,     +80.80917,     334.62236,      +80.87914,   698611.76, -3983188.48,  5047002.98,      51.480704,       -2.722780,  102169.90,  123508.08,   18210.42,            13719.30,  -114.94,  58590.79,           57920.87,    150.82,    -13.69,         252.91,  +0.94,  +0.48
  9,     UK001Z,       1,  0.286196, 2459437.397480832879, 331.53209,  80.82909,               12.91115,  55.89949,        12.77724,       55.85613,    331.53209,     +80.82909,     331.55381,      +80.91576,   697813.72, -3983939.91,  5045120.20,      51.466159,       -2.735920,  101072.02,  121588.62,   20389.04,            15897.92,  -313.66,  54954.61,           57781.88,    183.29,    -16.72,         312.23,  +1.42,  +1.00
 10,     UK001Z,       1,  0.325860, 2459437.397481292021, 328.66601,  80.83051,               12.50720,  56.29676,        12.35711,       56.24800,    328.66601,     +80.83051,     328.65993,      +80.92706,   697087.67, -3984623.55,  5043407.25,      51.452921,       -2.747886,  100073.62,  119850.01,   22371.15,            17880.02,  -710.09,  49972.37,           57351.14,    201.13,    -18.38,         347.60,  +3.85,  +3.46
  0,     UK0020,       1,  0.058756, 2459437.397478200495,  16.57125,  67.03241,               31.87549,  42.88285,        31.78712,       42.89690,     16.57125,     +67.03241,      16.62612,      +67.09514,   702320.25, -3979696.60,  5055752.24,      51.548208,       -2.661655,  107278.71,  156096.51,       0.00,             3595.29,  1022.63,      0.00,           52324.43,    149.77,   -100.72,         238.49,  +4.43,  +3.46
  1,     UK0020,       1,  0.098644, 2459437.397478662431,  16.26748,  66.97069,               32.03103,  42.95300,        31.80845,       42.98966,     16.26748,     +66.97069,      16.40097,      +67.12935,   701933.36, -3980060.89,  5054839.49,      51.541172,       -2.668120,  106745.17,  155066.50,    1056.17,             4651.46,  -313.17,  26478.45,           52324.43,    373.13,   -254.73,         600.96,  +2.52,  +1.57
  2,     UK0020,       1,  0.138460, 2459437.397479122970,  15.65296,  67.02054,               32.13944,  43.18514,        31.87247,       43.22952,     15.65296,     +67.02054,      15.80746,      +67.21094,   700945.90, -3980990.67,  5052509.81,      51.523207,       -2.684359,  105384.05,  152446.58,    3751.91,             7347.19,    -5.09,  67704.77,           52324.43,    438.03,   -300.23,         718.53,  +1.89,  +0.97
  3,     UK0020,       1,  0.178324, 2459437.397479584441,  15.14890,  67.11561,               32.16173,  43.40274,        31.92851,       43.44105,     15.14890,     +67.11561,      15.28146,      +67.28160,   700103.17, -3981784.18,  5050521.59,      51.507868,       -2.698238,  104223.07,  150212.24,    6052.53,             9647.82,   -94.99,  57711.83,           52324.43,    376.16,   -256.54,         625.22,  +2.36,  +1.48
  4,     UK0020,       1,  0.218140, 2459437.397480045445,  14.55760,  67.12413,               32.30832,  43.60675,        31.98714,       43.66058,     14.55760,     +67.12413,      14.73220,      +67.35309,   699254.11, -3982583.65,  5048518.45,      51.492406,       -2.712216,  103053.97,  147963.36,    8370.42,            11965.71,  -164.76,  58215.04,           54553.02,    507.68,   -349.25,         859.02,  +1.59,  +0.74
  5,     UK0020,       1,  0.257996, 2459437.397480506916,  13.97831,  67.24372,               32.31528,  43.86118,        32.05319,       43.90432,     13.97831,     +67.24372,      14.11807,      +67.42998,   698340.10, -3983444.28,  5046362.05,      51.475753,       -2.727245,  101796.11,  145545.35,   10865.65,            14460.94,   -59.58,  62606.12,           56340.86,    406.53,   -277.51,         697.56,  +1.50,  +0.69
  6,     UK0020,       1,  0.297840, 2459437.397480967920,  13.41149,  67.31270,               32.37707,  44.08638,        32.11409,       44.12955,     13.41149,     +67.31270,      13.54755,      +67.49935,   697522.16, -3984214.44,  5044432.32,      51.460844,       -2.740708,  100671.05,  143383.42,   13098.59,            16693.88,  -215.97,  56042.16,           56947.40,    400.49,   -273.10,         697.32,  +3.28,  +2.50

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.