The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 15GU56
# Created Wed May 8 01:17:04 2024
# Orbit generated from Bernstein formalism
# Fitting 40 observations of 40
# Arc: 2.35y
# First observation: 2015/02/17
# Last observation: 2017/06/24
Preliminary a, adot, b, bdot, g, gdot:
-0.000144 0.024172 0.000002 -0.000974 0.024207 0.000000
# Chi-squared of fit: 4.71 DOF: 74 RMS: 0.06
# Min/Max residuals: -0.17 0.20
# Exact a, adot, b, bdot, g, gdot:
1.570304E-05 2.405386E-02 -7.946812E-07 -9.694941E-04 2.427579E-02 -1.555478E-04
# Covariance matrix:
1.5432E-13 -1.8072E-14 1.4310E-16 -2.6757E-15 1.1367E-13 1.5629E-12
-1.8072E-14 3.0415E-13 2.7222E-15 -1.4411E-14 1.4536E-13 8.0634E-12
1.4310E-16 2.7222E-15 7.2533E-14 -5.8828E-14 1.4484E-15 1.0507E-13
-2.6757E-15 -1.4411E-14 -5.8828E-14 9.6206E-14 -9.8841E-15 -5.5615E-13
1.1367E-13 1.4536E-13 1.4484E-15 -9.8841E-15 1.9987E-13 5.6065E-12
1.5629E-12 8.0634E-12 1.0507E-13 -5.5615E-13 5.6065E-12 3.1119E-10
# lat0 lon0 xBary yBary zBary JD0
1.162165 -155.928407 0.815395 0.011366 -0.552989 2457070.998808
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 332.28524 +/- 0.699
Argument of Peri: 183.81646 +/- 0.783
Long of Asc Node: 49.59366 +/- 0.007
Inclination: 2.55520 +/- 0.001
Eccentricity: 0.04916016 +/- 0.0004
Semi-Major Axis: 43.63128525 +/- 0.0028
Time of Perihelion: 2465174.5865 +/- 204.5
Perihelion: 41.48636437 +/- 0.0161
Aphelion: 45.77620613 +/- 0.0162
Period (y) 288.2075 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -38.44359237 +/- 0.0007
Ecliptic Y -16.27948249 +/- 0.0003
Ecliptic Z 0.83545222 +/- 0.0000
Ecliptic XDOT 0.00111684 +/- 0.0000
Ecliptic YDOT -0.00247622 +/- 0.0000
Ecliptic ZDOT -0.00010958 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.75678777 +/- 0.0007
Geocenter to KBO 41.19329577 +/- 0.0008
# Hcoef: 7.22
The following table shows the complete astrometric record for 15GU56. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (15GU56) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.49803 13 30 52.596 -08 15 22.91 23.5r 15GU56 568 C~2nvT 2015 02 17.53937 13 30 52.500 -08 15 22.35 23.5r 15GU56 568 C~2nvT 2015 02 20.47010 13 30 45.870 -08 14 40.69 23.4r 15GU56 568 C~2nvT 2015 03 18.46654 13 29 21.171 -08 06 07.31 23.2r 15GU56 568 C~2nvT 2015 03 18.51775 13 29 20.957 -08 06 06.06 23.4r 15GU56 568 C~2nvT 2015 04 11.41033 13 27 36.671 -07 55 54.26 23.1r 15GU56 568 C~2nvT 2015 04 12.36301 13 27 32.323 -07 55 29.06 23.2r 15GU56 568 C~2nvT 2015 04 12.40393 13 27 32.138 -07 55 27.85 23.3r 15GU56 568 C~2nvT 2015 04 12.45094 13 27 31.914 -07 55 26.70 23.3r 15GU56 568 C~2nvT 2015 04 13.12231 13 27 28.85 -07 55 08.8 23.9V 15GU56 W84 C~3jdt 2015 04 13.21165 13 27 28.43 -07 55 06.3 15GU56 W84 C~3jdt 2015 04 13.30360 13 27 28.00 -07 55 03.9 15GU56 W84 C~3jdt 2015 04 14.46090 13 27 22.691 -07 54 33.38 23.1r 15GU56 568 C~2nvT 2015 04 16.40522 13 27 13.782 -07 53 42.04 23.3r 15GU56 568 C~2nvT 2015 04 18.42156 13 27 04.560 -07 52 48.87 23.3r 15GU56 568 C~2nvT 2015 04 18.46928 13 27 04.333 -07 52 47.53 23.2r 15GU56 568 C~2nvT 2015 05 16.26602 13 25 06.059 -07 41 39.49 23.3r 15GU56 568 C~2nvT 2015 05 25.37165 13 24 34.159 -07 38 45.43 23.4r 15GU56 568 C~2nvT 2015 05 25.41355 13 24 34.017 -07 38 44.68 23.3r 15GU56 568 C~2nvT 2015 05 25.42921 13 24 33.957 -07 38 44.46 23.4r 15GU56 568 C~2nvT 2015 06 21.32182 13 23 32.197 -07 33 32.07 23.3r 15GU56 568 C~2nvT 2015 06 22.27832 13 23 31.038 -07 33 27.28 23.5r 15GU56 568 C~2nvT 2015 07 12.27234 13 23 24.590 -07 33 35.14 23.5r 15GU56 568 C~2nvT 2015 07 15.26255 13 23 26.614 -07 33 54.44 23.6r 15GU56 568 C~2nvT 2015 07 19.26227 13 23 30.563 -07 34 27.15 23.5r 15GU56 568 C~2nvT 2016 02 04.57138 13 36 19.132 -08 50 52.33 23.7w 15GU56 568 C~2nvT 2016 02 10.55937 13 36 12.171 -08 50 05.69 23.8w 15GU56 568 C~2nvT 2016 02 10.60896 13 36 12.078 -08 50 05.11 23.8w 15GU56 568 C~2nvT 2016 02 11.58117 13 36 10.651 -08 49 55.89 23.7w 15GU56 568 C~2nvT 2016 03 11.56702 13 34 53.846 -08 42 09.14 23.6w 15GU56 568 C~2nvT 2016 04 03.45744 13 33 19.352 -08 32 57.52 23.4w 15GU56 568 C~2nvT 2016 04 09.43859 13 32 52.206 -08 30 21.35 23.5w 15GU56 568 C~2nvT 2016 05 01.36857 13 31 12.767 -08 20 57.45 23.7w 15GU56 568 C~2nvT 2016 05 02.31122 13 31 08.673 -08 20 34.45 23.6w 15GU56 568 C~2nvT 2016 05 06.32100 13 30 51.522 -08 18 58.80 23.7w 15GU56 568 C~2nvT 2016 05 28.28409 13 29 30.062 -08 11 34.63 23.5w 15GU56 568 C~2nvT 2016 06 04.36558 13 29 09.697 -08 09 48.23 23.6w 15GU56 568 C~2nvT 2017 02 24.64250 13 40 50.985 -09 20 12.79 15GU56 568 C~2nvT 2017 03 29.45933 13 38 53.894 -09 08 50.38 23.5w 15GU56 568 C~2nvT 2017 06 24.28972 13 33 38.603 -08 40 15.87 23.6w 15GU56 568 C~2nvT
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 -0.01 0.00 0.03
2 0.0001 -1.53 -0.07 -0.00 0.01
3 0.0081 -108.37 -0.03 2.63 -0.01
4 0.0793 -1466.64 -0.01 17.98 0.00
5 0.0795 -1470.06 -0.10 17.97 0.01
6 0.1449 -3135.72 -0.11 16.15 -0.03
7 0.1475 -3205.07 0.08 15.75 -0.03
8 0.1476 -3208.07 0.11 15.86 0.12
9 0.1477 -3211.59 0.08 15.70 0.00
10 0.1496 -3260.52 0.20 15.55 -0.05
11 0.1498 -3267.24 0.10 15.57 0.06
12 0.1500 -3274.07 0.09 15.44 0.01
13 0.1532 -3358.66 -0.04 14.70 0.01
14 0.1585 -3500.67 -0.02 13.57 -0.06
15 0.1641 -3647.69 0.07 12.41 0.03
16 0.1642 -3651.32 -0.03 12.41 0.08
17 0.2403 -5532.45 0.03 -16.72 -0.02
18 0.2652 -6037.81 0.01 -30.69 0.02
19 0.2653 -6040.05 -0.04 -30.78 0.01
20 0.2654 -6040.96 -0.14 -30.90 -0.08
21 0.3390 -7010.56 -0.06 -81.31 0.01
22 0.3416 -7028.36 -0.02 -83.26 0.03
23 0.3964 -7114.58 0.02 -126.17 0.07
24 0.4046 -7079.43 -0.02 -132.92 -0.16
25 0.4155 -7012.69 -0.08 -141.51 -0.03
26 0.9639 5287.87 0.04 -212.58 -0.01
27 0.9803 5174.72 0.12 -206.66 -0.01
28 0.9805 5173.23 -0.17 -206.62 0.01
29 0.9831 5150.16 -0.04 -205.73 -0.03
30 1.0625 3919.15 -0.04 -185.68 0.01
31 1.1251 2412.76 -0.03 -183.71 -0.00
32 1.1415 1980.80 0.00 -185.61 0.01
33 1.2016 401.26 0.01 -201.37 -0.05
34 1.2041 336.29 0.04 -202.26 0.01
35 1.2151 64.40 0.01 -206.68 0.03
36 1.2753 -1223.47 0.05 -237.84 -0.02
37 1.2946 -1543.79 -0.04 -250.14 -0.07
38 2.0209 9684.62 -0.04 -395.06 0.00
39 2.1108 7818.23 0.04 -385.25 0.03
40 2.3485 2838.78 0.02 -487.44 0.04
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.
15GU56 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.219 43.227 43.211 ecceobj 0.043 0.043 0.043 incobj 2.562 2.562 2.562 qmin 40.936 40.885 40.933 qmax 46.273 46.292 46.253 amean 43.502 43.510 43.493 amin 43.161 43.174 43.158 amax 43.849 43.849 43.848 emean 0.038 0.038 0.038 emin 0.021 0.021 0.020 emax 0.056 0.056 0.056 imean 1.562 1.564 1.559 imin 0.717 0.721 0.711 imax 2.226 2.226 2.225 excite_mean 0.047 0.047 0.047 fracstop 1.000 1.000 1.000 cjmean 3.093 3.093 3.093 libcent 0 -180.0 -180.0 -180.0 libamp 0 -180.0 -180.0 -180.0 libcent 1 -180.0 -180.0 -180.0 libamp 1 -180.0 -180.0 -180.0 libcent 2 -180.0 -180.0 -180.0 libamp 2 -180.0 -180.0 -180.0 libcent 3 -180.0 -180.0 -180.0 libamp 3 -180.0 -180.0 -180.0 libcent 4 -180.0 -180.0 -180.0 libamp 4 -180.0 -180.0 -180.0 kozaimean 182.2 182.2 181.7 kozaiamp 180.0 180.0 180.0