Orbital Analysis for matched events on 20210810_022408.629_UK

Summary for Event
-----------------
shower ID 12 KCG
Lg 297.40° Bg 70.17° Vg 21.90km/s
mass 0.04051g, abs. mag 1.6
Path Details
------------
start -3.79° 51.08° 95.19km
end   -3.66° 51.05° 83.08km

Orbit Details
-------------
Semimajor axis 3.50A.U., eccentricity 0.72, inclination 32.83°, Period 6.55Y, LA Sun 137.41°, last Perihelion 2015-02-08

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: 2459436.600099878851
Time: 2021-08-10 02:24:08.669524 UTC


Plane intersections
-------------------
Intersection 1 - Stations: UK0020 and UK003H
 Convergence angle = 47.61489 deg
 R.A. = 287.32549  Dec = +49.46447 deg

Best intersection: Stations UK0020 and UK003H with Qconv = 47.61 deg


Least squares solution
----------------------
State vector (ECI, epoch of date):
 X =   4025288.61 +/- 17.38 m
 Y =   -635110.77 +/- 42.13 m
 Z =   5013847.95 +/- 107.02 m
 Vx =     4635.94 +/- 52.58 m/s
 Vy =   -15362.21 +/- 16.05 m/s
 Vz =    18588.76 +/- 137.88 m/s

State vector covariance matrix (X, Y, Z, Vx, Vy, Vz):
+2.308623e+02, -3.843681e+02, +9.094850e+02, +3.263818e+02, +4.529773e+01, +8.828750e+02
-3.843681e+02, +1.294494e+03, -2.376765e+03, +6.532211e+01, -1.868560e+02, -1.828419e+03
+9.094850e+02, -2.376765e+03, +7.078602e+03, -3.674320e+02, +3.327618e+03, +5.450658e+03
+3.263818e+02, +6.532211e+01, -3.674320e+02, +1.500034e+03, -1.264297e+03, +5.068977e+02
+4.529773e+01, -1.868560e+02, +3.327618e+03, -1.264297e+03, +5.728719e+03, +9.294440e+02
+8.828750e+02, -1.828419e+03, +5.450658e+03, +5.068977e+02, +9.294440e+02, +6.969554e+03

Timing offsets (from input data):
    UK0020: 0.000000 s
    UK003H: -0.002418 s

Reference point on the trajectory:
  Time: 2021-08-10 02:24:08.669524 UTC
  Lon     = +-3.794205 +/- 0.0006 deg
  Lat     = +51.082411 +/- 0.0005 deg
  Lat geo = +50.896966 +/- 0.0005 deg
  Ht      =   95749.39 +/- 95.70 m

  JD dynamic   = 2459436.600901082624 
  LST apparent = 351.0337773650 deg
Radiant (apparent in ECI which includes Earth's rotation, epoch of date):
  R.A.      = 286.79252 +/- 0.1134 deg
  Dec       = +49.19808 +/- 0.2362 deg
  Azimuth   = 293.39272 +/- 0.3210 deg
  Elevation = +50.11720 +/- 0.1377 deg
  Vavg      =  23.30053 +/- 0.0278 km/s
  Vinit     =  24.55669 +/- 0.0948 km/s
Radiant (apparent ground-fixed, epoch of date):
  R.A.      = 287.26144 +/- 0.1134 deg
  Dec       = +49.67319 +/- 0.2362 deg
  Azimuth   = 293.82958 +/- 0.3210 deg
  Elevation = +50.60818 +/- 0.1377 deg
  Vavg      =  23.12683 +/- 0.0278 km/s
  Vinit     =  24.38299 +/- 0.0948 km/s
Radiant (geocentric, J2000):
  R.A.   = 283.49472 +/- 0.1228 deg
  Dec    = +48.01543 +/- 0.2526 deg
  Vg     =  21.90088 +/- 0.1061 km/s
  Vinf   =  24.55669 +/- 0.0948 km/s
  Zc     =  39.95673 +/- 0.1369 deg
  Zg     =  42.33788 +/- 0.1543 deg
Radiant (ecliptic geocentric, J2000):
  Lg     = 297.40070 +/- 0.3347 deg
  Bg     = +70.17248 +/- 0.2403 deg
  Vh     =  38.69032 +/- 0.0634 km/s
Radiant (ecliptic heliocentric, J2000):
  Lh     = 240.22412 +/- 0.1055 deg
  Bh     = +32.17638 +/- 0.1749 deg
  Vh_x   =  16.26293 +/- 0.0384 km/s
  Vh_y   =  28.42442 +/- 0.0834 km/s
  Vh_z   = -20.60365 +/- 0.1148 km/s
Orbit:
  La Sun = 137.405174 +/- -0.0000 deg
  a      =   3.502482 +/- 0.0678 AU
  e      =   0.722751 +/- 0.0054
  i      =  32.831032 +/- 0.1748 deg
  peri   = 205.879537 +/- 0.1910 deg
  node   = 137.411834 +/- 0.0000 deg
  Pi     = 343.291371 +/- 0.1911 deg
  q      =   0.971058 +/- 0.0007 AU
  f      = 334.114221 +/- 0.1910 deg
  M      = 357.036352 +/- 0.0928 deg
  Q      =   6.033906 +/- 0.1358 AU
  n      =   0.150363 +/- 0.0044 deg/day
  T      =   6.554876 +/- 0.1903 years
  Last perihelion JD = 2457062.100587 (2015-02-08 14:24:50.731215) +/- 69.5388 days
  Tj     =   2.438686 +/- 0.0281
Shower association:
  IAU No.  =   12
  IAU code =  KCG

Orbit covariance matrix:
             e     ,     q (AU)   ,      Tp (JD) ,   node (rad) ,   peri (rad) ,    i (rad)
e   , +2.779614e-05, -1.414228e-06, -3.529256e-01, -5.391512e-10, +2.451034e-06, +2.742280e-06
q   , -1.414228e-06, +3.341044e-07, +1.663731e-02, -7.485485e-11, -1.530489e-06, +3.777481e-07
Tp  , -3.529256e-01, +1.663731e-02, +4.489044e+03, +7.552059e-06, -2.405112e-02, -3.839682e-02
node, -5.391512e-10, -7.485485e-11, +7.552059e-06, +2.075936e-13, +4.986931e-10, -1.046733e-09
peri, +2.451034e-06, -1.530489e-06, -2.405112e-02, +4.986931e-10, +7.754976e-06, -2.520711e-06
i   , +2.742280e-06, +3.777481e-07, -3.839682e-02, -1.046733e-09, -2.520711e-06, +5.278236e-06

Jacchia fit on lag = -|a1|*exp(|a2|*t):
 a1 = 0.865618
 a2 = 9.861970

Mean time residuals from time vs. length:
  Station with reference time: UK0020
  Avg. res. = 1.256e-05 s
  Stddev    = 3.54e-03 s

Begin point on the trajectory:
  Lon =    -3.788118 +/- 0.0003 deg
  Lat =    51.080752 +/- 0.0004 deg
  Ht  = 95185.02 +/- 76.03 m
End point on the trajectory:
  Lon =    -3.660250 +/- 0.0001 deg
  Lat =    51.045030 +/- 0.0003 deg
  Ht  = 83084.88 +/- 48.32 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
    UK0020,   False,    -3.515726,    50.691998,   17.00,   1.327612,   9.237404,    95185.02,    83084.88,          0.016807,     26.72,      8.92,              25.48, 1.0000,    True,    True, {"ff_name": "FF_UK0020_20210810_022402_219_0539648.fits"}
    UK003H,   False,    -2.379250,    51.361350,  169.00,   0.009695,  17.581222,    94299.64,    84968.73,          0.013194,     30.93,      1.17,              29.13, 1.0000,    True,    True, {"ff_name": "FF_UK003H_20210810_022403_350_0543488.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,     UK0020,       1,  0.000000, 2459436.600099878851, 314.60017,  72.02595,              335.83636,  63.21470,       335.86086,       63.15846,    314.60017,     +72.02595,     314.46618,      +72.06568,  4025279.91,  -635081.97,  5013813.10,      51.082307,       -3.793657,   95714.06,  107051.19,       0.00,               46.04,   306.48,      0.00,           22882.39,    -34.03,   -101.53,         206.32,  +3.71,  +3.56
  1,     UK0020,       0,  0.039996, 2459436.600100341719, 314.82351,  72.17778,              336.20163,  63.18929,       336.20269,       63.18676,    314.82351,     +72.17778,     314.81762,      +72.17958,  4025149.75,  -634650.65,  5013291.19,      51.080752,       -3.788118,   95185.02,  106434.36,     689.46,              735.50,    13.77,  17238.22,           22882.39,     -1.52,     -4.54,           9.28,  +3.21,  +3.07
  2,     UK0020,       0,  0.079920, 2459436.600100803655, 315.38070,  72.36011,              336.74731,  63.22857,       336.74646,       63.23068,    315.38070,     +72.36011,     315.38608,      +72.35860,  4024948.91,  -633985.12,  5012485.88,      51.078352,       -3.779481,   94368.74,  105483.00,    1753.32,             1799.36,    97.22,  26647.07,           22882.39,      1.25,      3.75,           7.73,  +2.39,  +2.27
  3,     UK0020,       0,  0.119856, 2459436.600101266056, 315.88487,  72.52315,              337.23756,  63.26026,       337.23458,       63.26809,    315.88487,     +72.52315,     315.90405,      +72.51753,  4024771.59,  -633397.53,  5011774.88,      51.076232,       -3.771873,   93648.09,  104644.97,    2692.59,             2738.63,    55.80,  23519.44,           22882.39,      4.60,     13.75,          28.58,  +2.61,  +2.51
  4,     UK0020,       0,  0.159776, 2459436.600101727992, 316.40850,  72.65891,              337.68624,  63.30809,       337.68877,       63.30120,    316.40850,     +72.65891,     316.39277,      +72.66390,  4024609.11,  -632859.09,  5011123.35,      51.074289,       -3.764915,   92987.76,  103878.60,    3553.29,             3599.33,   -63.80,  21560.67,           22807.46,     -4.01,    -12.01,          25.14,  +2.18,  +2.10
  5,     UK0020,       0,  0.199684, 2459436.600102189928, 317.07044,  72.83236,              338.25773,  63.36153,       338.26477,       63.34132,    317.07044,     +72.83236,     317.02329,      +72.84713,  4024408.06,  -632192.90,  5010317.23,      51.071883,       -3.756265,   92170.81,  102931.83,    4618.22,             4664.26,    21.12,  26684.51,           23339.41,    -11.66,    -34.85,          73.63,  +2.11,  +2.05
  6,     UK0020,       0,  0.239624, 2459436.600102652330, 317.62934,  73.02136,              338.81528,  63.37509,       338.81456,       63.37727,    317.62934,     +73.02136,     317.63552,      +73.01976,  4024219.75,  -631568.86,  5009562.13,      51.069628,       -3.748172,   91405.60,  102047.07,    5615.75,             5661.79,    37.85,  24975.69,           23704.83,      1.24,      3.72,           7.93,  +1.93,  +1.89
  7,     UK0020,       0,  0.279560, 2459436.600103114732, 318.17866,  73.18443,              339.32235,  63.39708,       339.31892,       63.40819,    318.17866,     +73.18443,     318.20615,      +73.17620,  4024049.75,  -631005.54,  5008880.50,      51.067592,       -3.740881,   90714.89,  101250.24,    6516.22,             6562.26,   -42.38,  22547.80,           23760.69,      6.28,     18.80,          40.38,  +2.09,  +2.06
  8,     UK0020,       0,  0.319492, 2459436.600103576668, 318.80217,  73.36650,              339.89149,  63.41792,       339.88490,       63.44084,    318.80217,     +73.36650,     318.85769,      +73.34938,  4023862.99,  -630386.68,  5008131.65,      51.065354,       -3.732854,   89956.11,  100376.53,    7505.48,             7551.52,   -33.71,  24773.79,           23854.30,     12.82,     38.40,          83.19,  +1.99,  +1.98
  9,     UK0020,       0,  0.359388, 2459436.600104038604, 319.56684,  73.53385,              340.49385,  63.47206,       340.49348,       63.47344,    319.56684,     +73.53385,     319.57157,      +73.53281,  4023666.42,  -629735.30,  5007343.46,      51.062997,       -3.724396,   89157.53,   99459.00,    8546.72,             8592.76,    27.82,  26098.88,           24024.26,      0.76,      2.28,           4.99,  +1.66,  +1.67
 10,     UK0020,       0,  0.399304, 2459436.600104500540, 320.27876,  73.70921,              341.08710,  63.50234,       341.08703,       63.50262,    320.27876,     +73.70921,     320.28108,      +73.70900,  4023478.34,  -629112.03,  5006589.29,      51.060740,       -3.716308,   88393.46,   98583.30,    9543.02,             9589.06,    43.91,  24959.74,           24159.49,      0.15,      0.46,           1.02,  +1.65,  +1.68
 11,     UK0020,       0,  0.439216, 2459436.600104962476, 321.03560,  73.88442,              341.69824,  63.53453,       341.69924,       63.53011,    321.03560,     +73.88442,     321.02713,      +73.88782,  4023288.20,  -628481.97,  5005826.90,      51.058458,       -3.708129,   87621.11,   97700.24,   10550.18,            10596.22,    70.96,  25234.53,           24278.84,     -2.40,     -7.19,          16.01,  +1.62,  +1.67
 12,     UK0020,       0,  0.479140, 2459436.600105424412, 321.69124,  74.02418,              342.20751,  63.56479,       342.21044,       63.55079,    321.69124,     +74.02418,     321.66081,      +74.03504,  4023131.49,  -627962.67,  5005198.52,      51.056577,       -3.701417,   86984.53,   96974.35,   11380.30,            11426.34,   -79.32,  20792.48,           24236.06,     -7.55,    -22.57,          50.63,  +1.73,  +1.80
 13,     UK0020,       0,  0.519076, 2459436.600105886813, 322.39766,  74.21569,              342.81864,  63.56169,       342.81652,       63.57314,    322.39766,     +74.21569,     322.42625,      +74.20673,  4022949.66,  -627360.16,  5004469.47,      51.054392,       -3.693601,   86246.03,   96133.90,   12343.41,            12389.45,   -96.90,  24116.44,           24205.76,      6.11,     18.28,          41.36,  +1.71,  +1.80
 14,     UK0020,       0,  0.559008, 2459436.600106348749, 323.05440,  74.36372,              343.33766,  63.57437,       343.33505,       63.58999,    323.05440,     +74.36372,     323.09259,      +74.35140,  4022796.11,  -626851.31,  5003853.74,      51.052547,       -3.687025,   85622.33,   95425.99,   13156.82,            13202.86,  -264.09,  20369.77,           24090.14,      8.26,     24.74,          56.39,  +1.70,  +1.80
 15,     UK0020,       0,  0.598940, 2459436.600106811151, 323.83031,  74.54749,              343.96121,  63.57557,       343.95655,       63.60795,    323.83031,     +74.54749,     323.90667,      +74.52171,  4022615.99,  -626254.45,  5003131.53,      51.050381,       -3.679283,   84890.83,   94597.43,   14110.90,            14156.94,  -290.61,  23892.70,           24008.42,     16.96,     50.81,         116.80,  +2.17,  +2.29
 16,     UK0020,       0,  0.638852, 2459436.600107273087, 324.48727,  74.63330,              344.38496,  63.62389,       344.38569,       63.61834,    324.48727,     +74.63330,     324.47740,      +74.63775,  4022492.17,  -625844.17,  5002635.07,      51.048892,       -3.674012,   84387.94,   94029.53,   14766.75,            14812.79,  -614.87,  16432.36,           23803.84,     -2.89,     -8.65,          20.00,  +2.69,  +2.82
 17,     UK0020,       0,  0.678828, 2459436.600107735489, 325.02085,  74.80404,              344.87344,  63.58187,       344.86828,       63.62864,    325.02085,     +74.80404,     325.12915,      +74.76628,  4022355.26,  -625390.49,  5002086.10,      51.047245,       -3.668165,   83831.90,   93402.66,   15491.96,            15538.00,  -871.33,  18141.24,           23560.78,     24.15,     72.41,         168.56,  +4.50,  +4.65
 18,     UK0020,       0,  0.718704, 2459436.600108196959, 326.03654,  74.94165,              345.53327,  63.63823,       345.53305,       63.64066,    326.03654,     +74.94165,     326.04493,      +74.93967,  4022171.30,  -624780.88,  5001348.45,      51.045030,       -3.660250,   83084.88,   92562.05,   16466.43,            16512.47,  -876.09,  24437.44,           23400.65,      1.24,      3.72,           8.74,  +4.45,  +4.62
  0,     UK003H,       0,  0.080555, 2459436.600100839976, 302.10668,  22.48672,              252.68326,  41.83191,       252.68510,       41.82944,    302.10668,     +22.48672,     302.10417,      +22.48573,  4024931.91,  -633928.78,  5012417.71,      51.078149,       -3.778748,   94299.64,  139891.90,       0.00,             1889.42,   171.70,      0.00,           23704.98,      0.26,      6.89,          10.16,  +4.25,  +3.52
  1,     UK003H,       0,  0.120595, 2459436.600101303309, 302.18402,  22.33896,              252.48218,  41.76500,       252.49611,       41.74648,    302.18402,     +22.33896,     302.16305,      +22.33148,  4024779.00,  -633422.08,  5011804.58,      51.076321,       -3.772211,   93678.19,  139194.55,     809.98,             2699.39,    -1.58,  20229.19,           23704.98,      1.97,     51.55,          76.44,  +4.53,  +3.81
  2,     UK003H,       0,  0.200751, 2459436.600102230906, 302.31761,  21.93840,              252.01104,  41.53733,       252.01334,       41.53431,    302.31761,     +21.93840,     302.31495,      +21.93718,  4024394.36,  -632147.48,  5010262.27,      51.071719,       -3.755678,   92115.12,  137441.24,    2847.44,             4736.86,    67.52,  25418.75,           23704.98,      0.32,      8.33,          12.51,  +2.82,  +2.13
  3,     UK003H,       0,  0.240795, 2459436.600102694705, 302.40489,  21.77165,              251.78552,  41.46093,       251.80174,       41.43968,    302.40489,     +21.77165,     302.38122,      +21.76306,  4024227.79,  -631595.51,  5009594.38,      51.069724,       -3.748540,   91438.27,  136685.38,    3729.77,             5619.19,   -33.50,  22033.93,           23704.98,      2.23,     58.38,          88.16,  +3.11,  +2.43
  4,     UK003H,       0,  0.280875, 2459436.600103158504, 302.46884,  21.56786,              251.55122,  41.34188,       251.55950,       41.33109,    302.46884,     +21.56786,     302.45748,      +21.56351,  4024038.98,  -630969.84,  5008837.30,      51.067463,       -3.740424,   90671.12,  135829.21,    4729.91,             6619.32,   -17.59,  24953.55,           23822.52,      1.12,     29.50,          44.83,  +2.11,  +1.45
  5,     UK003H,       0,  0.320963, 2459436.600103622302, 302.53551,  21.35168,              251.30456,  41.21451,       251.30368,       41.21565,    302.53551,     +21.35168,     302.53819,      +21.35214,  4023841.53,  -630315.55,  5008045.59,      51.065096,       -3.731929,   89868.92,  134935.51,    5775.80,             7665.21,    43.87,  26089.82,           24103.44,     -0.12,     -3.11,           4.76,  +2.16,  +1.51
  6,     UK003H,       0,  0.361039, 2459436.600104086101, 302.59894,  21.15589,              251.07893,  41.10062,       251.07184,       41.10977,    302.59894,     +21.15589,     302.61111,      +21.15959,  4023664.05,  -629727.44,  5007333.95,      51.062968,       -3.724309,   89147.89,  134134.80,    6715.90,             8605.32,    -0.16,  23458.11,           24168.05,     -0.93,    -24.79,          38.15,  +2.02,  +1.38
  7,     UK003H,       0,  0.401099, 2459436.600104549900, 302.68747,  20.96275,              250.83209,  41.00327,       250.83425,       41.00049,    302.68747,     +20.96275,     302.68592,      +20.96163,  4023483.79,  -629130.10,  5006611.15,      51.060806,       -3.716565,   88415.59,  133323.16,    7670.76,             9560.18,   -29.04,  23835.73,           24176.16,      0.28,      7.49,          11.60,  +2.01,  +1.39
  8,     UK003H,       0,  0.441171, 2459436.600105013698, 302.76542,  20.75839,              250.58661,  40.89062,       250.58938,       40.88707,    302.76542,     +20.75839,     302.76314,      +20.75696,  4023299.69,  -628520.05,  5005872.97,      51.058596,       -3.708652,   87667.76,  132495.93,    8645.94,            10535.36,   -37.90,  24335.66,           24189.24,      0.36,      9.53,          14.84,  +1.63,  +1.02
  9,     UK003H,       0,  0.481251, 2459436.600105477497, 302.84399,  20.54013,              250.32966,  40.76715,       250.33033,       40.76629,    302.84399,     +20.54013,     302.84502,      +20.53978,  4023106.80,  -627880.87,  5005099.54,      51.056280,       -3.700352,   86884.29,  131630.87,    9667.67,            11557.09,    -0.40,  25492.28,           24257.61,      0.09,      2.28,           3.58,  +1.64,  +1.04
 10,     UK003H,       0,  0.521335, 2459436.600105941761, 302.91716,  20.32256,              250.07927,  40.64063,       250.07493,       40.64611,    302.91716,     +20.32256,     302.92574,      +20.32477,  4022918.36,  -627256.41,  5004343.93,      51.054016,       -3.692246,   86118.90,  130788.00,   10665.88,            12555.29,    13.48,  24902.83,           24322.95,     -0.54,    -14.58,          23.01,  +1.79,  +1.21
 11,     UK003H,       0,  0.561367, 2459436.600106405094, 303.01331,  20.16842,              249.85959,  40.57675,       249.87904,       40.55223,    303.01331,     +20.16842,     302.98705,      +20.15850,  4022774.57,  -626779.95,  5003767.39,      51.052288,       -3.686100,   85534.88,  130148.22,   11427.51,            13316.93,  -207.95,  19025.56,           24180.33,      2.46,     65.00,         103.09,  +2.31,  +1.74
 12,     UK003H,       0,  0.601455, 2459436.600106868893, 303.03847,  19.99367,              249.69189,  40.45491,       249.68791,       40.45990,    303.03847,     +19.99367,     303.04682,      +19.99569,  4022635.18,  -626318.05,  5003208.48,      51.050612,       -3.680146,   84968.73,  129529.42,   12165.86,            14055.28,  -454.02,  18418.34,           23918.38,     -0.49,    -13.19,          21.02,  +3.18,  +2.62
 13,     UK003H,       1,  0.641567, 2459436.600107333157, 303.02932,  19.81555,              249.55517,  40.31016,       249.50608,       40.37130,    303.02932,     +19.81555,     303.10357,      +19.84016,  4022503.34,  -625881.18,  5002679.85,      51.049026,       -3.674524,   84433.27,  128945.68,   12864.20,            14753.62,  -740.70,  17409.76,           23577.68,     -5.83,   -161.20,         258.03,  +6.62,  +6.07

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.