Input measurement type: Azimuth +east of due north for meas1, Elevation angle above the horizon for meas2 Uncertainties type: Uncertainties computed using MC runs with lower cost function value than the purely geometric solution Reference JD: 2458400.556516203564 Time: 2018-10-09 01:21:22.999988 UTC Plane intersections ------------------- Intersection 1 - Stations: 1 and 2 Convergence angle = 70.52667 deg R.A. = 267.19774 Dec = +56.60519 deg Best intersection: Stations 1 and 2 with Qconv = 70.53 deg Least squares solution ---------------------- State vector (ECI, epoch of date): X = 3425221.77 +/- 2.56 m Y = -3239067.57 +/- 10.86 m Z = 4430087.71 +/- 16.10 m Vx = -845.06 +/- 6.37 m/s Vy = -12605.89 +/- 5.57 m/s Vz = 18764.76 +/- 13.79 m/s State vector covariance matrix (X, Y, Z, Vx, Vy, Vz): +6.597107e+00, -6.578824e-01, +2.823557e+00, +1.338920e+01, -1.556267e+01, +2.753719e+01 -6.578824e-01, +1.185225e+02, -1.738319e+02, -1.920404e+01, +2.647701e+01, -3.370984e+01 +2.823557e+00, -1.738319e+02, +2.605710e+02, +3.311202e+01, -4.038258e+01, +6.327246e+01 +1.338920e+01, -1.920404e+01, +3.311202e+01, +4.112783e+01, -4.535890e+01, +8.220404e+01 -1.556267e+01, +2.647701e+01, -4.038258e+01, -4.535890e+01, +5.575637e+01, -8.861095e+01 +2.753719e+01, -3.370984e+01, +6.327246e+01, +8.220404e+01, -8.861095e+01, +1.705944e+02 Timing offsets (from input data): 1: 0.000000 s 2: -0.000044 s Reference point on the trajectory: Time: 2018-10-09 01:21:22.999988 UTC Lon = -81.363679 +/- 0.0001 deg Lat = +43.409475 +/- 0.0001 deg Lat geo = +43.220384 +/- 0.0001 deg Ht = 101063.53 +/- 16.58 m JD dynamic = 2458400.557316944469 LST apparent = 316.6000321831 deg Radiant (apparent in ECI which includes Earth's rotation, epoch of date): R.A. = 266.16482 +/- 0.0310 deg Dec = +56.04790 +/- 0.0082 deg Azimuth = +309.75419 +/- 0.0146 deg Elevation = +55.94197 +/- 0.0173 deg Vavg = 22.44475 +/- 0.0141 km/s Vinit = 22.62164 +/- 0.0144 km/s Radiant (apparent ground-fixed, epoch of date): R.A. = 267.17898 +/- 0.0310 deg Dec = +56.60420 +/- 0.0082 deg Azimuth = +310.76949 +/- 0.0146 deg Elevation = +56.49602 +/- 0.0173 deg Vavg = 22.29889 +/- 0.0141 km/s Vinit = 22.47578 +/- 0.0144 km/s Radiant (geocentric, J2000): R.A. = 261.74504 +/- 0.1011 deg Dec = +55.99788 +/- 0.0619 deg Vg = 19.71066 +/- 0.0166 km/s Vinf = 22.62164 +/- 0.0144 km/s Zc = 34.17923 +/- 0.0557 deg Zg = 36.60147 +/- 0.0607 deg Radiant (ecliptic geocentric, J2000): Lg = 245.72380 +/- 0.1880 deg Bg = +78.73810 +/- 0.0753 deg Vh = 38.11007 +/- 0.0153 km/s Radiant (ecliptic heliocentric, J2000): Lh = 282.02423 +/- 0.0431 deg Bh = +30.48331 +/- 0.0246 deg Vh_x = -6.84190 +/- 0.0217 km/s Vh_y = 32.12180 +/- 0.0187 km/s Vh_z = -19.33275 +/- 0.0173 km/s Orbit: La Sun = 195.451984 +/- 0.0000 deg a = 2.741772 +/- 0.0102 AU e = 0.636860 +/- 0.0013 i = 30.528207 +/- 0.0238 deg peri = 172.406949 +/- 0.0918 deg node = 195.452928 +/- 0.0000 deg Pi = 7.859877 +/- 0.0918 deg q = 0.995647 +/- 0.0001 AU f = 7.591031 +/- 0.0918 deg M = 1.301354 +/- 0.0140 deg Q = 4.487898 +/- 0.0205 AU n = 0.217099 +/- 0.0012 deg/day T = 4.539915 +/- 0.0256 years Last perihelion JD = 2458394.563016 (2018-10-03 01:30:44.610460) +/- 0.0709 days Tj = 2.862197 +/- 0.0066 Shower association: IAU No. = 9 IAU code = DRA Orbit covariance matrix: e , q (AU) , Tp (JD) , node (rad) , peri (rad) , i (rad) e , +1.775030e-06, -5.338801e-08, -3.458134e-05, -6.969255e-12, -8.465225e-07, +1.025781e-07 q , -5.338801e-08, +7.858284e-09, +6.273362e-06, -1.990196e-12, +1.422307e-07, +2.869812e-08 Tp , -3.458134e-05, +6.273362e-06, +5.053972e-03, -1.706563e-09, +1.142287e-04, +2.462020e-05 node, -6.969255e-12, -1.990196e-12, -1.706563e-09, +8.283988e-16, -3.778337e-11, -1.197552e-11 peri, -8.465225e-07, +1.422307e-07, +1.142287e-04, -3.778337e-11, +2.584511e-06, +5.450065e-07 i , +1.025781e-07, +2.869812e-08, +2.462020e-05, -1.197552e-11, +5.450065e-07, +1.731301e-07 Jacchia fit on lag = -|a1|*exp(|a2|*t): a1 = 8.101263 a2 = 5.220533 Mean time residuals from time vs. length: Station with reference time: 1 Avg. res. = 1.279e-05 s Stddev = 3.58e-03 s Begin point on the trajectory: Lon = -81.363720 +/- 0.0000 deg Lat = 43.409500 +/- 0.0000 deg Ht = 101070.08 +/- 7.56 m End point on the trajectory: Lon = -81.288253 +/- 0.0000 deg Lat = 43.362018 +/- 0.0000 deg Ht = 88707.40 +/- 5.86 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 1, False, -80.772100, 43.264200, 330.00, 50.936968, 1.720869, 101077.93, 88706.80, 0.002647, 4.24, 2.25, 13.01, 1.0000, None, None 2, False, -81.315700, 43.192800, 320.00, 1.174232, 8.685556, 98619.73, 88969.17, 0.001247, 1.75, 1.08, 24.47, 1.0000, None, None 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, 1, 0, 0.000000, 2458400.556516203564, 108.80100, 27.08700, 288.80100, 62.91300, 288.79981, 62.91183, 278.99106, +45.81170, 278.98952, +45.81099, 3425221.77, -3239078.80, 4430100.51, 43.409510, -81.363778, 101077.93, 112932.39, 0.00, 30.04, -257.68, 0.00, 24578.89, -1.18, 2.25, 4.64, None, None 1, 1, 0, 0.062000, 2458400.556516921148, 108.48400, 27.02800, 288.48400, 62.97200, 288.48021, 62.96825, 279.10559, +45.67795, 279.10091, +45.67568, 3425272.45, -3238323.08, 4428976.14, 43.405209, -81.356940, 99954.83, 111620.87, 1355.68, 1385.72, -305.14, 21865.89, 24578.89, -3.75, 7.12, 14.87, None, None 2, 1, 0, 0.093000, 2458400.556517280173, 108.28100, 26.99200, 288.28100, 63.00800, 288.27779, 63.00479, 279.17658, +45.59233, 279.17276, +45.59040, 3425303.99, -3237852.82, 4428276.50, 43.402532, -81.352652, 99256.01, 110804.07, 2199.27, 2229.30, -163.13, 27212.38, 24578.89, -3.18, 6.03, 12.68, None, None 3, 1, 0, 0.124000, 2458400.556517638732, 108.06900, 26.95600, 288.06900, 63.04400, 288.06749, 63.04248, 279.24863, +45.50291, 279.24716, +45.50199, 3425336.20, -3237372.53, 4427561.93, 43.399797, -81.348269, 98542.30, 109970.09, 3060.85, 3090.89, -3.12, 27793.03, 24578.89, -1.49, 2.82, 5.99, None, None 4, 1, 0, 0.155000, 2458400.556517997757, 107.88400, 26.92500, 287.88400, 63.07500, 287.88338, 63.07437, 279.31105, +45.42500, 279.31088, +45.42462, 3425363.86, -3236960.11, 4426948.32, 43.397448, -81.344524, 97929.45, 109254.86, 3800.70, 3830.73, 35.14, 23865.89, 24825.32, -0.61, 1.16, 2.47, None, None 5, 1, 0, 0.186000, 2458400.556518356316, 107.71100, 26.89500, 287.71100, 63.10500, 287.70980, 63.10377, 279.37096, +45.35247, 279.37013, +45.35174, 3425389.52, -3236577.54, 4426379.13, 43.395268, -81.341059, 97360.97, 108591.95, 4486.99, 4517.03, 19.87, 22138.64, 24607.89, -1.19, 2.25, 4.84, None, None 6, 1, 0, 0.218000, 2458400.556518726517, 107.54000, 26.86600, 287.54000, 63.13400, 287.53828, 63.13223, 279.42936, +45.28083, 279.42797, +45.27978, 3425414.49, -3236205.27, 4425825.27, 43.393147, -81.337694, 96807.81, 107947.38, 5154.81, 5184.84, -36.52, 20869.16, 24167.96, -1.70, 3.22, 6.96, None, None 7, 1, 0, 0.249000, 2458400.556519085541, 107.35900, 26.83500, 287.35900, 63.16500, 287.35661, 63.16252, 279.49172, +45.20523, 279.48954, +45.20375, 3425440.60, -3235815.91, 4425245.97, 43.390928, -81.334164, 96229.27, 107273.10, 5853.28, 5883.31, -39.63, 22531.31, 23847.76, -2.37, 4.48, 9.74, None, None 8, 1, 0, 0.280000, 2458400.556519444101, 107.15500, 26.80300, 287.15500, 63.19700, 287.15445, 63.19642, 279.55803, +45.11973, 279.55846, +45.11939, 3425469.26, -3235388.49, 4424610.07, 43.388491, -81.330276, 95594.22, 106532.77, 6620.01, 6650.04, 25.53, 24733.27, 23740.34, -0.55, 1.03, 2.26, None, None 9, 1, 0, 0.311000, 2458400.556519803125, 106.96200, 26.77300, 286.96200, 63.22700, 286.96280, 63.22785, 279.62054, +45.03900, 279.62293, +45.03950, 3425495.98, -3234990.13, 4424017.39, 43.386219, -81.326661, 95002.35, 105843.34, 7334.62, 7364.66, 38.57, 23052.01, 23648.65, 0.80, -1.50, 3.31, None, None 10, 1, 0, 0.342000, 2458400.556520161685, 106.78900, 26.74500, 286.78900, 63.25500, 286.78937, 63.25539, 279.67824, +44.96698, 279.68017, +44.96721, 3425519.76, -3234635.59, 4423489.91, 43.384197, -81.323457, 94475.58, 105230.45, 7970.63, 8000.66, -27.00, 20516.35, 23465.37, 0.37, -0.69, 1.54, None, None 11, 1, 0, 0.373000, 2458400.556520520709, 106.58800, 26.71500, 286.58800, 63.28500, 286.59027, 63.28744, 279.74189, +44.88306, 279.74659, +44.88449, 3425546.73, -3234233.46, 4422891.62, 43.381903, -81.319805, 93878.13, 104534.97, 8692.00, 8722.04, -7.20, 23270.20, 23349.33, 2.26, -4.26, 9.52, None, None 12, 1, 0, 0.404000, 2458400.556520879269, 106.39100, 26.68500, 286.39100, 63.31500, 286.39422, 63.31849, 279.80526, +44.80111, 279.81143, +44.80315, 3425572.87, -3233843.71, 4422311.74, 43.379678, -81.316270, 93299.09, 103861.29, 9391.18, 9421.22, -9.59, 22554.17, 23252.80, 3.21, -6.04, 13.59, None, None 13, 1, 0, 0.435000, 2458400.556521238293, 106.25700, 26.66100, 286.25700, 63.33900, 286.25640, 63.33835, 279.85343, +44.74611, 279.85441, +44.74573, 3425590.86, -3233575.39, 4421912.54, 43.378147, -81.313876, 92900.43, 103399.06, 9872.51, 9902.55, -229.84, 15526.74, 22981.56, -0.60, 1.13, 2.55, None, None 14, 1, 0, 0.466000, 2458400.556521596853, 106.02400, 26.62800, 286.02400, 63.37200, 286.02659, 63.37485, 279.92526, +44.64916, 279.93085, +44.65081, 3425620.76, -3233129.56, 4421249.22, 43.375602, -81.309812, 92238.10, 102628.36, 10672.30, 10702.33, -131.63, 25799.50, 22869.65, 2.59, -4.86, 11.07, None, None 15, 1, 0, 0.498000, 2458400.556521967519, 105.81700, 26.59600, 285.81700, 63.40400, 285.81928, 63.40653, 279.99296, +44.56373, 279.99828, +44.56519, 3425647.23, -3232734.98, 4420662.17, 43.373348, -81.306234, 91651.92, 101947.23, 11380.13, 11410.16, -148.00, 22119.77, 22777.14, 2.28, -4.28, 9.82, None, None 16, 1, 0, 0.529000, 2458400.556522326078, 105.64700, 26.56800, 285.64700, 63.43200, 285.64676, 63.43173, 280.05106, +44.49404, 280.05292, +44.49388, 3425668.87, -3232412.25, 4420182.01, 43.371505, -81.303328, 91172.47, 101391.03, 11959.07, 11989.10, -270.63, 18675.47, 22635.54, -0.25, 0.46, 1.06, None, None 17, 1, 0, 0.560000, 2458400.556522685103, 105.36900, 26.52700, 285.36900, 63.47300, 285.37067, 63.47489, 280.13969, +44.37953, 280.14444, +44.38062, 3425703.19, -3231900.46, 4419420.58, 43.368581, -81.298642, 90412.27, 100506.85, 12877.15, 12907.19, -54.12, 29615.63, 22653.90, 1.68, -3.15, 7.33, None, None 18, 1, 0, 0.591000, 2458400.556523043662, 105.19400, 26.49700, 285.19400, 63.50300, 285.19171, 63.50039, 280.20139, +44.30843, 280.20055, +44.30693, 3425724.92, -3231576.58, 4418938.70, 43.366730, -81.295724, 89931.12, 99949.16, 13458.17, 13488.21, -174.68, 18742.53, 22607.23, -2.30, 4.31, 10.09, None, None 19, 1, 0, 0.622000, 2458400.556523402687, 104.99400, 26.47100, 284.99400, 63.52900, 284.99383, 63.52880, 280.26068, +44.22579, 280.26302, +44.22568, 3425748.65, -3231222.70, 4418412.20, 43.364708, -81.292524, 89405.45, 99339.67, 14092.99, 14123.03, -241.43, 20478.08, 22543.47, -0.18, 0.33, 0.78, None, None 20, 1, 0, 0.653000, 2458400.556523761246, 104.72200, 26.43800, 284.72200, 63.56200, 284.72753, 63.56846, 280.33836, +44.11324, 280.34924, +44.11691, 3425780.19, -3230752.32, 4417712.38, 43.362019, -81.288226, 88706.80, 98528.50, 14936.79, 14966.83, -99.20, 27219.39, 22555.16, 5.61, -10.47, 24.87, None, None 0, 2, 0, 0.122908, 2458400.556517611258, 173.37100, 13.47600, 353.37100, 76.52400, 353.36949, 76.52466, 313.85052, +56.55055, 313.85059, +56.54984, 3425332.71, -3237424.65, 4427639.46, 43.400094, -81.348749, 98619.73, 101038.52, 0.00, 2997.41, -71.89, 0.00, 23299.21, 0.70, 1.13, 2.70, None, None 1, 2, 0, 0.153908, 2458400.556517970283, 174.08200, 13.38700, 354.08200, 76.61300, 354.08095, 76.61347, 314.17005, +56.48633, 314.17037, +56.48583, 3425361.64, -3236993.22, 4426997.59, 43.397637, -81.344825, 97978.65, 100343.30, 773.93, 3771.33, 0.46, 24965.43, 23299.21, 0.49, 0.79, 1.91, None, None 2, 2, 0, 0.184908, 2458400.556518328842, 174.73800, 13.30600, 354.73800, 76.69400, 354.73979, 76.69318, 314.46066, +56.42547, 314.46199, +56.42633, 3425387.86, -3236602.34, 4426416.03, 43.395410, -81.341282, 97397.82, 99714.36, 1475.13, 4472.54, 0.09, 22619.54, 23299.21, -0.84, -1.36, 3.31, None, None 3, 2, 0, 0.215908, 2458400.556518687867, 175.41200, 13.22800, 355.41200, 76.77200, 355.41228, 76.77187, 314.75428, +56.36546, 314.75527, +56.36560, 3425413.98, -3236212.84, 4425836.53, 43.393190, -81.337751, 96819.06, 99088.55, 2173.85, 5171.26, -2.77, 22539.22, 23299.21, -0.13, -0.22, 0.53, None, None 4, 2, 0, 0.246908, 2458400.556519046426, 176.12400, 13.14600, 356.12400, 76.85400, 356.12709, 76.85251, 315.06025, +56.29962, 315.06230, +56.30116, 3425441.03, -3235809.50, 4425236.44, 43.390891, -81.334090, 96219.75, 98441.44, 2897.40, 5894.81, 19.21, 23340.46, 23208.81, -1.49, -2.41, 5.93, None, None 5, 2, 0, 0.278908, 2458400.556519417092, 176.88500, 13.06300, 356.88500, 76.93700, 356.88861, 76.93521, 315.38190, +56.23070, 315.38429, +56.23254, 3425469.11, -3235390.72, 4424613.39, 43.388504, -81.330287, 95597.53, 97770.63, 3648.64, 6646.04, 46.24, 23476.06, 23222.41, -1.77, -2.86, 7.09, None, None 6, 2, 0, 0.309908, 2458400.556519775651, 177.56600, 12.99300, 357.56600, 77.00700, 357.56711, 77.00643, 315.66529, +56.17058, 315.66697, +56.17116, 3425493.63, -3235025.14, 4424069.48, 43.386419, -81.326980, 95054.35, 97185.93, 4304.45, 7301.86, 0.48, 21155.26, 23006.57, -0.55, -0.89, 2.23, None, None 7, 2, 0, 0.340908, 2458400.556520134676, 178.31400, 12.91800, 358.31400, 77.08200, 358.31439, 77.08180, 315.97225, +56.10355, 315.97380, +56.10376, 3425519.94, -3234632.94, 4423485.96, 43.384182, -81.323422, 94471.65, 96559.60, 5008.01, 8005.42, 2.47, 22695.51, 22891.23, -0.19, -0.31, 0.79, None, None 8, 2, 0, 0.371908, 2458400.556520493235, 179.06600, 12.84400, 359.06600, 77.15600, 359.06812, 77.15486, 316.27640, +56.03459, 316.27874, +56.03574, 3425545.85, -3234246.60, 4422911.16, 43.381978, -81.319919, 93897.65, 95943.59, 5701.07, 8698.48, -6.04, 22356.86, 22802.04, -1.09, -1.76, 4.45, None, None 9, 2, 0, 0.402908, 2458400.556520852260, 179.77800, 12.77800, 359.77800, 77.22200, 359.77926, 77.22130, 316.56027, +55.97068, 316.56244, +55.97138, 3425569.81, -3233889.27, 4422379.53, 43.379938, -81.316688, 93366.76, 95374.71, 6342.08, 9339.49, -66.61, 20677.61, 22641.43, -0.66, -1.07, 2.72, None, None 10, 2, 0, 0.433908, 2458400.556521210819, 180.59200, 12.70700, 0.59200, 77.29300, 0.59078, 77.29370, 316.88027, +55.89893, 316.88158, +55.89823, 3425596.42, -3233492.50, 4421789.21, 43.377674, -81.313086, 92777.31, 94744.06, 7053.85, 10051.25, -56.42, 22960.18, 22568.11, 0.65, 1.06, 2.71, None, None 11, 2, 0, 0.464908, 2458400.556521569844, 181.32200, 12.64600, 1.32200, 77.35400, 1.31834, 77.35617, 317.16334, +55.83447, 317.16373, +55.83232, 3425619.85, -3233143.13, 4421269.42, 43.375679, -81.309930, 92258.27, 94189.62, 7680.57, 10677.98, -131.27, 20216.96, 22435.82, 2.00, 3.24, 8.34, None, None 12, 2, 0, 0.495908, 2458400.556521928404, 182.18600, 12.57400, 2.18600, 77.42600, 2.18468, 77.42681, 317.49352, +55.75504, 317.49501, +55.75424, 3425646.97, -3232738.84, 4420667.92, 43.373370, -81.306257, 91657.67, 93549.12, 8405.83, 11403.23, -107.59, 23395.34, 22387.23, 0.74, 1.20, 3.11, None, None 13, 2, 0, 0.526908, 2458400.556522287428, 183.00400, 12.50900, 3.00400, 77.49100, 3.00460, 77.49062, 317.80156, +55.67974, 317.80403, +55.68012, 3425672.10, -3232364.15, 4420110.45, 43.371230, -81.302861, 91101.05, 92956.53, 9077.99, 12075.39, -137.00, 21682.56, 22336.61, -0.35, -0.56, 1.46, None, None 14, 2, 0, 0.558908, 2458400.556522657629, 183.88900, 12.44600, 3.88900, 77.55400, 3.88642, 77.55574, 318.13066, +55.60209, 318.13174, +55.60041, 3425698.49, -3231970.66, 4419525.02, 43.368982, -81.299293, 90516.53, 92335.32, 9783.85, 12781.26, -155.34, 22058.27, 22296.41, 1.54, 2.50, 6.56, None, None 15, 2, 0, 0.589908, 2458400.556523016654, 184.76900, 12.38400, 4.76900, 77.61600, 4.76719, 77.61728, 318.45295, +55.52197, 318.45449, +55.52074, 3425724.23, -3231586.78, 4418953.89, 43.366789, -81.295811, 89946.29, 91730.39, 10472.49, 13469.90, -168.28, 22214.15, 22267.76, 1.12, 1.82, 4.81, None, None 16, 2, 0, 0.620908, 2458400.556523375213, 185.67500, 12.32500, 5.67500, 77.67500, 5.67236, 77.67697, 318.78049, +55.44069, 318.78165, +55.43881, 3425750.09, -3231201.25, 4418380.29, 43.364585, -81.292312, 89373.61, 91123.97, 11164.09, 14161.50, -178.25, 22309.71, 22248.94, 1.71, 2.77, 7.36, None, None 17, 2, 0, 0.651908, 2458400.556523734238, 186.31600, 12.28300, 6.31600, 77.71700, 6.31475, 77.71797, 319.00901, +55.38074, 319.01102, +55.37982, 3425768.34, -3230929.01, 4417975.26, 43.363029, -81.289880, 88969.17, 90696.32, 11652.46, 14649.86, -391.46, 15753.79, 22122.26, 0.83, 1.35, 3.61, None, None 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.