Orbital Analysis for matched events on 20210929_015722.655_UK

Summary for Event
-----------------
shower ID -1 spo
Lg 89.84° Bg 4.36° Vg 61.51km/s
mass 0.00417g, abs. mag 0.8
Path Details
------------
start -4.93° 50.64° 111.88km
end   -5.01° 50.65° 106.73km

Orbit Details
-------------
Semimajor axis 1.23A.U., eccentricity 0.28, inclination 171.49°, Period 1.36Y, LA Sun 185.86°, last Perihelion 2020-07-11

Full details below
Click here to download a zip of the raw and processed data.

Detailed report below graphs

Click on an image to see a larger view


Input measurement type: Azimuth +east of due north for meas1, Elevation angle above the horizon for meas2

Uncertainties type:
 Purely geometric uncertainties

Reference JD: 2459486.581512222067
Time: 2021-09-29 01:57:22.661056 UTC


Plane intersections
-------------------
Intersection 1 - Stations: UK0021 and UK0024
 Convergence angle = 7.12348 deg
 R.A. =  88.16052  Dec = +29.23177 deg

Best intersection: Stations UK0021 and UK0024 with Qconv = 7.12 deg


Least squares solution
----------------------
State vector (ECI, epoch of date):
 X =   3478847.37 +/- 292.70 m
 Y =   2214058.26 +/- 102.15 m
 Z =   4995127.30 +/- 172.37 m
 Vx =      163.94 +/- 2798.84 m/s
 Vy =    55142.71 +/- 23196.67 m/s
 Vz =    29420.03 +/- 13466.32 m/s

State vector covariance matrix (X, Y, Z, Vx, Vy, Vz):
+8.624948e+04, -2.973862e+04, +4.991022e+04, +3.957615e+05, +4.109386e+06, +2.520569e+06
-2.973862e+04, +1.063674e+04, -1.731882e+04, -1.365756e+05, -1.417762e+06, -8.717067e+05
+4.991022e+04, -1.731882e+04, +2.971313e+04, +2.438160e+05, +2.355434e+06, +1.466596e+06
+3.957615e+05, -1.365756e+05, +2.438160e+05, +5.255738e+06, +2.120809e+07, +1.571118e+07
+4.109386e+06, -1.417762e+06, +2.355434e+06, +2.120809e+07, +5.161350e+08, +2.951526e+08
+2.520569e+06, -8.717067e+05, +1.466596e+06, +1.571118e+07, +2.951526e+08, +1.718417e+08

Timing offsets (from input data):
    UK0021: -0.000048 s
    UK0024: 0.000000 s

Reference point on the trajectory:
  Time: 2021-09-29 01:57:22.661056 UTC
  Lon     = +-4.925891 +/- 0.0026 deg
  Lat     = +50.644759 +/- 0.0003 deg
  Lat geo = +50.459197 +/- 0.0003 deg
  Ht      =  111876.80 +/- 205.18 m

  JD dynamic   = 2459486.582313021645 
  LST apparent = 32.4740794652 deg
Radiant (apparent in ECI which includes Earth's rotation, epoch of date):
  R.A.      =  89.82966 +/- 2.4931 deg
  Dec       = +28.08094 +/- 1.4794 deg
  Azimuth   =  95.34478 +/- 0.6508 deg
  Elevation = +41.74141 +/- 2.5683 deg
  Vavg      =  60.68256 +/- 0.1222 km/s
  Vinit     =  62.50027 +/- 25.0857 km/s
Radiant (apparent ground-fixed, epoch of date):
  R.A.      =  89.99743 +/- 2.4931 deg
  Dec       = +27.97197 +/- 1.4794 deg
  Azimuth   =  95.31059 +/- 0.6508 deg
  Elevation = +41.55932 +/- 2.5683 deg
  Vavg      =  60.90628 +/- 0.1222 km/s
  Vinit     =  62.72398 +/- 25.0857 km/s
Radiant (geocentric, J2000):
  R.A.   =  89.82083 +/- 2.5043 deg
  Dec    = +27.79497 +/- 1.4917 deg
  Vg     =  61.50781 +/- 0.5239 km/s
  Vinf   =  62.50027 +/- 0.5154 km/s
  Zc     =  48.24157 +/- 2.5700 deg
  Zg     =  48.65221 +/- 2.5896 deg
Radiant (ecliptic geocentric, J2000):
  Lg     =  89.84105 +/- 2.1435 deg
  Bg     =  +4.35738 +/- 1.5438 deg
  Vh     =  32.35875 +/- 0.3614 km/s
Radiant (ecliptic heliocentric, J2000):
  Lh     =  83.39515 +/- 4.2238 deg
  Bh     =  +8.30767 +/- 2.8183 deg
  Vh_x   =  -3.68289 +/- 2.2235 km/s
  Vh_y   = -31.80669 +/- 0.7829 km/s
  Vh_z   =  -4.67547 +/- 1.5806 km/s
Orbit:
  La Sun = 185.856182 +/- nan deg
  a      =   1.225454 +/- 0.0431 AU
  e      =   0.278169 +/- 0.0598
  i      = 171.494938 +/- 3.2697 deg
  peri   = 242.467400 +/- 9.3578 deg
  node   = 185.851969 +/- 0.0010 deg
  Pi     =  68.319369 +/- 9.3588 deg
  q      =   0.884570 +/- 0.0635 AU
  f      = 297.526940 +/- 9.3569 deg
  M      = 323.024804 +/- 3.4233 deg
  Q      =   1.566338 +/- 0.1181 AU
  n      =   0.726539 +/- 0.0350 deg/day
  T      =   1.356582 +/- 0.0730 years
  Last perihelion JD = 2459041.974265 (2020-07-11 11:22:56.515058) +/- 27.8523 days
  Tj     =   3.324856 +/- 0.1402
Shower association:
  IAU No.  =   -1
  IAU code =  ...

Orbit covariance matrix:
             e     ,     q (AU)   ,      Tp (JD) ,   node (rad) ,   peri (rad) ,    i (rad)
e   , +3.396218e-03, -3.381798e-03, -7.376335e-01, +9.404856e-07, +7.975550e-03, -3.104066e-03
q   , -3.381798e-03, +3.794929e-03, +2.400471e-01, -1.018770e-06, -9.602741e-03, +3.337155e-03
Tp  , -7.376335e-01, +2.400471e-01, +7.413636e+02, -1.036432e-04, +1.974218e-01, +3.828332e-01
node, +9.404856e-07, -1.018770e-06, -1.036432e-04, +3.098479e-10, +2.587095e-06, -9.519022e-07
peri, +7.975550e-03, -9.602741e-03, +1.974218e-01, +2.587095e-06, +2.541889e-02, -8.261843e-03
i   , -3.104066e-03, +3.337155e-03, +3.828332e-01, -9.519022e-07, -8.261843e-03, +3.085651e-03

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: UK0024
  Avg. res. = 2.316e-05 s
  Stddev    = 4.81e-03 s

Begin point on the trajectory:
  Lon =    -4.925766 +/- 0.0026 deg
  Lat =    50.644751 +/- 0.0004 deg
  Ht  = 111884.83 +/- 212.80 m
End point on the trajectory:
  Lon =    -5.006352 +/- 0.0030 deg
  Lat =    50.649486 +/- 0.0003 deg
  Ht  = 106727.15 +/- 218.06 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
    UK0021,   False,    -3.515726,    50.691998,   17.00,   0.000000,   0.000000,   111884.83,   106727.15,          0.011077,     29.05,      1.75,              85.95, 1.0000,    True,    True, {"ff_name": "FF_UK0021_20210929_015722_347_0667904.fits"}
    UK0024,   False,    -2.949770,    50.877440,   82.00,   0.000000,   0.000000,   111855.27,   107157.91,          0.010334,     32.78,      2.09,              94.70, 1.0000,    True,    True, {"ff_name": "FF_UK0024_20210929_015722_151_0673024.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,     UK0021,       0,  0.006886, 2459486.581512280740, 339.89360,  33.54728,              267.53290,  47.56104,       267.52727,       47.56059,    339.89360,     +33.54728,     339.89618,      +33.54411,  3478847.40,  2214068.91,  4995132.98,      50.644751,       -4.925766,  111884.83,  150511.52,       0.00,               12.07,   -97.17,      0.00,           64184.92,     -0.61,     10.03,          13.77,  +3.58,  +2.69
  1,     UK0021,       0,  0.047622, 2459486.581512751989, 338.90065,  32.95654,              267.67319,  46.54647,       267.69827,       46.54844,    338.90065,     +32.95654,     338.88911,      +32.97085,  3478840.40,  2211715.58,  4993877.42,      50.646386,       -4.953478,  110109.27,  150518.31,    2667.33,             2655.26,     0.01,  65478.35,           64184.92,      2.74,    -45.53,          62.50,  +1.36,  +0.47
  2,     UK0021,       0,  0.088402, 2459486.581513224170, 337.80814,  32.35208,              267.89199,  45.45637,       267.87595,       45.45511,    337.80814,     +32.35208,     337.81621,      +32.34282,  3478832.84,  2209172.42,  4992520.58,      50.648147,       -4.983431,  108191.15,  150578.46,    5549.82,             5537.75,   333.74,  70684.07,           64184.92,     -1.80,     29.70,          40.76,  +1.27,  +0.38
  3,     UK0021,       0,  0.129022, 2459486.581513694488, 337.01134,  31.85173,              267.99746,  44.61948,       268.00699,       44.62023,    337.01134,     +31.85173,     337.00720,      +31.85729,  3478827.07,  2207230.73,  4991484.64,      50.649486,       -5.006352,  106727.15,  150663.70,    7750.58,             7738.51,    -4.26,  54179.12,           64184.92,      1.08,    -17.91,          24.56,  +2.71,  +1.82
  0,     UK0024,       0,  0.000000, 2459486.581512222067, 336.33452,  22.69996,              260.25446,  37.36251,       260.25160,       37.36201,    336.33452,     +22.69996,     336.33598,      +22.69805,  3478847.28,  2214029.74,  4995112.08,      50.644778,       -4.926203,  111855.27,  181552.49,       0.00,               32.32,   353.46,      0.00,           58163.94,      0.47,      7.37,           8.39,  +3.21,  +1.91
  1,     UK0024,       0,  0.040612, 2459486.581512691919, 335.69872,  22.30221,              260.46296,  36.67292,       260.44259,       36.66935,    335.69872,     +22.30221,     335.70936,      +22.28858,  3478841.34,  2212029.57,  4994044.94,      50.646168,       -4.949781,  110346.14,  181899.60,    2267.05,             2299.37,    82.25,  55822.14,           58163.94,      3.38,     52.99,          60.21,  +1.98,  +0.68
  2,     UK0024,       0,  0.081272, 2459486.581513162702, 335.04128,  21.83743,              260.63571,  35.91938,       260.64500,       35.92101,    335.04128,     +21.83743,     335.03679,      +21.84368,  3478834.89,  2209860.04,  4992887.45,      50.647671,       -4.975354,  108709.71,  182306.67,    4726.05,             4758.38,    -0.01,  60477.18,           58163.94,     -1.57,    -24.44,          27.71,  +1.64,  +0.34
  3,     UK0024,       0,  0.121896, 2459486.581513633020, 334.41065,  21.41366,              260.82180,  35.21202,       260.83269,       35.21393,    334.41065,     +21.41366,     334.40544,      +21.42103,  3478828.77,  2207802.11,  4991789.48,      50.649093,       -4.999634,  107157.91,  182723.24,    7058.57,             7090.90,  -206.49,  57417.37,           58163.94,     -1.86,    -28.95,          32.74,  +2.67,  +1.36

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.