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: 18HM14
# Created Sun Apr 27 01:11:10 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 17 observations of 17
# Arc: 5.10y
# First observation: 2014/02/28
# Last observation: 2019/04/04
# Chi-squared of fit: 8.23 DOF: 28 RMS: 0.12
# Min/Max residuals: -0.30 0.26
# Exact a, adot, b, bdot, g, gdot:
1.433295E-05 2.014413E-02 -2.880034E-07 -5.245617E-04 2.221526E-02 7.850356E-04
# Covariance matrix:
4.7934E-13 -2.8963E-13 -1.3607E-15 4.7805E-15 -2.2445E-13 -1.9731E-12
-2.8963E-13 9.9480E-13 6.6695E-15 -2.3692E-14 1.4448E-12 9.8844E-12
-1.3607E-15 6.6695E-15 4.3545E-13 -1.0236E-13 9.5017E-15 6.8784E-14
4.7805E-15 -2.3692E-14 -1.0236E-13 3.0534E-14 -3.4149E-14 -2.4397E-13
-2.2445E-13 1.4448E-12 9.5017E-15 -3.4149E-14 2.5835E-12 1.4406E-11
-1.9731E-12 9.8844E-12 6.8784E-14 -2.4397E-13 1.4406E-11 1.0163E-10
# lat0 lon0 xBary yBary zBary JD0
1.824407 173.133064 0.231874 0.030709 -0.960610 2456716.863734
# Heliocentric elements and errors
Epoch: 2456716.5000 = 2014/02/28
Mean Anomaly: 134.00311 +/- 0.331
Argument of Peri: 351.53485 +/- 0.334
Long of Asc Node: 43.19713 +/- 0.009
Inclination: 2.31914 +/- 0.000
Eccentricity: 0.05181209 +/- 0.0004
Semi-Major Axis: 44.32317155 +/- 0.0073
Time of Perihelion: 2416596.8581 +/- 99.5
Perihelion: 42.02669543 +/- 0.0185
Aphelion: 46.61964768 +/- 0.0188
Period (y) 295.0900 +/- 0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -45.59644094 +/- 0.0032
Ecliptic Y 5.72594193 +/- 0.0004
Ecliptic Z 1.43307045 +/- 0.0001
Ecliptic XDOT -0.00040064 +/- 0.0000
Ecliptic YDOT -0.00245595 +/- 0.0000
Ecliptic ZDOT -0.00006140 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.97687890 +/- 0.0032
Geocenter to KBO 45.01411348 +/- 0.0033
# Hcoef: 7.53
The following table shows the complete astrometric record for 18HM14. 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 (18HM14) followed by the observatory code and reference code for the source of the astrometry.
2014 02 28.362956 11 37 40.39 +04 24 05.4 18HM14 T09 C~8MgL 2014 02 28.375841 11 37 40.34 +04 24 05.7 18HM14 T09 C~8MgL 2014 02 28.395883 11 37 40.25 +04 24 06.3 18HM14 T09 C~8MgL 2016 03 17.569014 11 44 52.12 +03 33 33.5 18HM14 T09 C~8MgL 2018 03 10.505008 11 53 46.13 +02 31 39.5 18HM14 T09 C~8MgL 2018 03 18.46645 11 53 13.19 +02 35 12.3 24.1i 18HM14 T09 C~8MgL 2018 03 18.49491 11 53 13.09 +02 35 13.1 24.2i 18HM14 T09 C~8MgM 2018 03 18.56803 11 53 12.78 +02 35 15.1 24.1i 18HM14 T09 C~8MgM 2018 04 12.118960 11 51 34.315 +02 45 33.73 23.9V 18HM14 W84 C~8MgM 2018 04 24.36214 11 50 51.73 +02 49 50.6 24.2z 18HM14 T09 C~8MgM 2018 04 24.39066 11 50 51.64 +02 49 50.7 23.5z 18HM14 T09 C~8MgM 2018 04 24.43452 11 50 51.50 +02 49 51.6 23.9z 18HM14 T09 C~8MgM 2018 04 24.47734 11 50 51.37 +02 49 52.8 24.2z 18HM14 T09 C~8MgM 2018 04 24.49071 11 50 51.31 +02 49 53.1 23.6z 18HM14 T09 C~8MgM 2019 02 05.500779 11 59 54.61 +01 49 10.1 18HM14 T09 C~8MgM 2019 02 05.662517 11 59 54.15 +01 49 13.2 18HM14 T09 C~8MgM 2019 04 04.436418 11 56 14.93 +02 13 11.9 18HM14 T09 C~8MgM
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 -0.02
2 0.0000 0.00 0.03 0.00 -0.06
3 0.0001 0.00 -0.09 0.00 0.01
4 2.0485 0.00 0.09 0.00 0.09
5 4.0278 0.00 0.17 0.00 -0.15
6 4.0496 0.00 -0.30 0.00 -0.04
7 4.0496 0.00 0.00 0.00 -0.00
8 4.0498 0.00 -0.02 0.00 0.05
9 4.1171 0.00 -0.13 0.00 0.04
10 4.1506 0.00 -0.03 0.00 0.19
11 4.1507 0.00 0.02 0.00 -0.25
12 4.1508 0.00 0.07 0.00 -0.18
13 4.1509 0.00 0.20 0.00 0.21
14 4.1509 0.00 -0.05 0.00 0.26
15 4.9367 0.00 -0.03 0.00 0.03
16 4.9372 0.00 0.03 0.00 -0.03
17 5.0953 0.00 -0.02 0.00 -0.11
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.
18HM14 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.043 44.043 44.043 ecceobj 0.057 0.057 0.057 incobj 2.322 2.322 2.322 qmin 40.750 40.752 40.749 qmax 47.865 47.870 47.872 amean 44.199 44.199 44.199 amin 43.854 43.857 43.849 amax 44.569 44.569 44.568 emean 0.059 0.059 0.059 emin 0.043 0.043 0.043 emax 0.075 0.075 0.075 imean 1.655 1.655 1.655 imin 0.908 0.908 0.908 imax 2.227 2.227 2.227 excite_mean 0.066 0.066 0.066 fracstop 1.000 1.000 1.000 cjmean 3.099 3.099 3.099 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 181.3 181.3 181.2 kozaiamp 180.0 180.0 180.0