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: 15FY400
# Created Tue Apr 1 01:10:21 2025
# Orbit generated from Bernstein formalism
# Fitting 30 observations of 30
# Arc: 1.86y
# First observation: 2015/03/18
# Last observation: 2017/01/26
Preliminary a, adot, b, bdot, g, gdot:
-0.000035 0.025568 -0.000000 -0.000686 0.024704 0.000000
# Chi-squared of fit: 15.15 DOF: 54 RMS: 0.13
# Min/Max residuals: -0.32 0.38
# Exact a, adot, b, bdot, g, gdot:
1.766634E-05 2.568053E-02 3.481039E-07 -6.894070E-04 2.518224E-02 -4.115829E-04
# Covariance matrix:
2.3798E-13 7.1634E-13 2.0166E-15 -2.2671E-14 1.7031E-12 2.2701E-11
7.1634E-13 5.8421E-12 1.5239E-14 -1.6331E-13 1.1025E-11 1.5913E-10
2.0166E-15 1.5239E-14 9.8170E-14 -7.0697E-14 2.8835E-14 4.2038E-13
-2.2671E-14 -1.6331E-13 -7.0697E-14 1.0535E-13 -3.1538E-13 -4.5348E-12
1.7031E-12 1.1025E-11 2.8835E-14 -3.1538E-13 2.2327E-11 3.1098E-10
2.2701E-11 1.5913E-10 4.2038E-13 -4.5348E-12 3.1098E-10 4.4359E-09
# lat0 lon0 xBary yBary zBary JD0
1.664077 -178.340626 0.074220 0.028857 -0.988957 2457099.995558
# Heliocentric elements and errors
Epoch: 2457090.5000 = 2015/03/09
Mean Anomaly: 348.94137 +/- 1.615
Argument of Peri: 146.29137 +/- 1.907
Long of Asc Node: 48.19411 +/- 0.013
Inclination: 2.23255 +/- 0.000
Eccentricity: 0.07934777 +/- 0.0010
Semi-Major Axis: 44.12801042 +/- 0.0314
Time of Perihelion: 2460379.5367 +/- 480.3
Perihelion: 40.62655138 +/- 0.0530
Aphelion: 47.62946946 +/- 0.0559
Period (y) 293.1431 +/- 0.31
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -40.67135529 +/- 0.0074
Ecliptic Y -1.10415971 +/- 0.0002
Ecliptic Z 1.15320740 +/- 0.0002
Ecliptic XDOT 0.00011997 +/- 0.0000
Ecliptic YDOT -0.00279539 +/- 0.0000
Ecliptic ZDOT -0.00007613 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.70268047 +/- 0.0074
Geocenter to KBO 39.71053302 +/- 0.0075
# Hcoef: 8.53
The following table shows the complete astrometric record for 15FY400. 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 (15FY400) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.49478 12 08 44.21 +00 52 00.8 24.6r 15FY400 T09 C~8eRZ 2015 03 18.50552 12 08 44.17 +00 52 01.2 24.5r 15FY400 T09 C~8eRZ 2015 03 18.52286 12 08 44.10 +00 52 01.5 24.6r 15FY400 T09 C~8eRZ 2015 03 20.444244 12 08 35.290 +00 52 58.61 23.9i 15FY400 568 C~2TuK 2015 03 20.483035 12 08 35.109 +00 52 59.75 24.0i 15FY400 568 C~2TuK 2015 03 20.496906 12 08 35.040 +00 53 00.22 23.9i 15FY400 568 C~2TuK 2015 03 20.521711 12 08 34.927 +00 53 00.91 24.0i 15FY400 568 C~2TuK 2015 03 25.472038 12 08 12.136 +00 55 27.20 25.3g 15FY400 568 C~2TuK 2015 03 25.499924 12 08 11.995 +00 55 27.98 25.3g 15FY400 568 C~2TuK 2015 03 25.528103 12 08 11.865 +00 55 28.84 25.1g 15FY400 568 C~2TuK 2015 03 25.556134 12 08 11.733 +00 55 29.74 25.2g 15FY400 568 C~2TuK 2015 03 29.26630 12 07 54.70 +00 57 18.0 23.4y 15FY400 T09 C~8eRZ 2015 03 29.28550 12 07 54.61 +00 57 18.6 23.5y 15FY400 T09 C~8eRZ 2015 03 29.29365 12 07 54.57 +00 57 19.0 23.3y 15FY400 T09 C~8eRZ 2016 04 02.39692 12 12 53.58 +00 22 16.0 24.2i 15FY400 T09 C~8HFs 2016 04 02.46363 12 12 53.27 +00 22 17.6 24.4i 15FY400 T09 C~8HFs 2016 04 02.49633 12 12 53.12 +00 22 18.6 24.4i 15FY400 T09 C~8HFs 2016 04 02.52059 12 12 53.01 +00 22 19.3 24.5i 15FY400 T09 C~8HFs 2016 04 04.35168 12 12 44.76 +00 23 11.2 25.5g 15FY400 T09 C~8HFs 2016 04 04.38515 12 12 44.59 +00 23 12.4 25.9g 15FY400 T09 C~8HFs 2016 04 04.41084 12 12 44.51 +00 23 12.9 26.0g 15FY400 T09 C~8HFs 2016 04 08.50734 12 12 26.22 +00 25 07.3 24.7r 15FY400 T09 C~8HFs 2016 04 08.51792 12 12 26.19 +00 25 07.6 24.5r 15FY400 T09 C~8HFs 2016 04 08.52003 12 12 26.18 +00 25 07.6 24.7r 15FY400 T09 C~8HFs 2016 04 08.52637 12 12 26.14 +00 25 07.8 24.8r 15FY400 T09 C~8HFs 2017 01 26.62279 12 22 24.18 -00 42 46.9 24.4z 15FY400 T09 C~8eRZ 2017 01 26.62885 12 22 24.16 -00 42 46.9 24.6z 15FY400 T09 C~8eRZ 2017 01 26.63421 12 22 24.15 -00 42 46.7 24.4z 15FY400 T09 C~8eRZ 2017 01 26.63960 12 22 24.14 -00 42 46.5 24.4z 15FY400 T09 C~8eRZ 2017 01 26.64766 12 22 24.13 -00 42 46.5 24.2z 15FY400 T09 C~8eRZ
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 -0.32 0.00 -0.16
2 0.0000 -0.71 -0.21 0.13 -0.03
3 0.0001 -1.79 0.02 -0.01 -0.16
4 0.0053 -145.74 0.12 -0.16 0.05
5 0.0054 -148.68 0.14 -0.19 0.05
6 0.0055 -149.82 0.06 -0.17 0.08
7 0.0055 -151.65 0.12 -0.21 0.06
8 0.0191 -523.46 0.23 -1.90 0.13
9 0.0192 -525.71 0.10 -2.03 0.03
10 0.0193 -527.84 0.11 -2.02 0.08
11 0.0193 -530.01 0.07 -1.98 0.14
12 0.0295 -807.46 -0.10 -4.22 -0.16
13 0.0295 -808.94 -0.13 -4.20 -0.13
14 0.0296 -809.65 -0.22 -4.07 0.01
15 1.0429 4142.18 -0.13 -149.82 0.13
16 1.0430 4137.28 -0.04 -150.20 -0.16
17 1.0431 4134.82 -0.05 -150.18 -0.09
18 1.0432 4133.02 -0.03 -150.19 -0.07
19 1.0482 3998.79 0.10 -151.80 -0.14
20 1.0483 3995.97 -0.23 -151.72 -0.01
21 1.0484 3994.67 0.38 -151.74 0.01
22 1.0596 3697.36 -0.14 -155.92 0.05
23 1.0596 3696.83 0.09 -155.82 0.16
24 1.0596 3696.69 0.11 -155.88 0.10
25 1.0596 3696.06 -0.06 -155.94 0.06
26 1.8621 13566.22 0.08 -325.90 -0.01
27 1.8621 13565.95 0.00 -326.02 -0.13
28 1.8621 13565.73 -0.04 -325.90 -0.02
29 1.8621 13565.51 -0.08 -325.77 0.10
30 1.8622 13565.37 0.05 -325.83 0.03
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.
15FY400 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.709 43.784 43.639 ecceobj 0.070 0.073 0.068 incobj 2.236 2.237 2.236 qmin 39.875 39.861 39.804 qmax 48.156 48.313 48.073 amean 43.916 43.992 43.843 amin 43.570 43.641 43.494 amax 44.283 44.355 44.218 emean 0.071 0.073 0.069 emin 0.053 0.056 0.052 emax 0.088 0.090 0.088 imean 1.544 1.556 1.528 imin 0.667 0.694 0.638 imax 2.278 2.290 2.228 excite_mean 0.076 0.078 0.075 fracstop 1.000 1.000 1.000 cjmean 3.093 3.094 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 174.9 175.2 176.0 kozaiamp 180.0 179.9 179.9