Orbit Fit and Astrometric record for 17NM2

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: 17NM2     
# Created Wed Oct 17 01:10:02 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   41 observations of   42
# Arc:   1.82y
# First observation: 2015/11/30
#  Last observation: 2017/09/25
# Chi-squared of fit:   679.88 DOF:   76 RMS:  0.72
# Min/Max residuals:    -0.73    2.27
# Exact a, adot, b, bdot, g, gdot:
 -9.534570E-06 -1.063344E-01  4.910745E-05  5.587863E-01  1.810795E-01 -1.038302E-01
# Covariance matrix:
  3.6791E-13 -2.5817E-13 -2.1121E-15  2.7544E-13  1.2774E-13  1.2031E-13
 -2.5817E-13  2.4771E-13  2.1088E-14 -6.1962E-13 -2.7031E-13 -2.8122E-13
 -2.1121E-15  2.1088E-14  3.6710E-13 -3.5136E-13 -4.1394E-14 -8.3543E-14
  2.7544E-13 -6.1962E-13 -3.5136E-13  3.3205E-12  1.3504E-12  1.4777E-12
  1.2774E-13 -2.7031E-13 -4.1394E-14  1.3504E-12  5.9390E-13  6.0996E-13
  1.2031E-13 -2.8122E-13 -8.3543E-14  1.4777E-12  6.0996E-13  6.9225E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   52.469131   93.151074    0.426327    0.707612   -0.543331  2457357.049869
# Heliocentric elements and errors
Epoch:              2457356.5000  =  2015/11/30
Mean Anomaly:          351.77151 +/-     0.000
Argument of Peri:       89.27210 +/-     0.000
Long of Asc Node:       99.27858 +/-     0.000
Inclination:           101.29093 +/-     0.000
Eccentricity:         0.62492683 +/-    0.0000
Semi-Major Axis:     14.67650351 +/-    0.1382
Time of Perihelion: 2457825.9072 +/-     283.4
Perihelion:           5.50476272 +/-    0.0518
Aphelion:            23.84824430 +/-    0.2246
Period (y)               56.2266 +/-      0.79
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            0.18807466 +/-    0.0000
Ecliptic Y            4.27195227 +/-    0.0000
Ecliptic Z            4.37956302 +/-    0.0000
Ecliptic XDOT         0.00202497 +/-    0.0000
Ecliptic YDOT        -0.00756316 +/-    0.0000
Ecliptic ZDOT         0.00390190 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    6.12098389 +/-    0.0000
Geocenter to KBO      5.52250580 +/-    0.0000
# Hcoef: 13.85

The following table shows the complete astrometric record for 17NM2. 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 (17NM2) followed by the observatory code and reference code for the source of the astrometry.

2015 11  30.54908  06 31 25.940  +75 49 20.86  21.0G 17NM2     F51  C~2jiV      
2015 12  01.59239  06 28 32.135  +75 59 27.68  21.4G 17NM2     F51  C~2jiV      
2015 12  01.60556  06 28 29.924  +75 59 35.22  21.3G 17NM2     F51  C~2jiV      
2015 12  01.61880  06 28 27.626  +75 59 42.73  21.3G 17NM2     F51  C~2jiV      
2017 06  06.51276  20 37 53.788  +66 16 37.38  21.5i 17NM2     F51  C~2HlF      
2017 06  06.52534  20 37 52.671  +66 16 39.78  21.6i 17NM2     F51  C~2HlF      
2017 06  06.53793  20 37 51.561  +66 16 41.88  21.1i 17NM2     F51  C~2HlF      
2017 06  06.55052  20 37 50.434  +66 16 44.16  21.5i 17NM2     F51  C~2HlF      
2017 07  04.44886  19 48 10.626  +66 17 56.88  21.5i 17NM2     F51  C~2HlF      
2017 07  04.45935  19 48 09.341  +66 17 54.73  21.1i 17NM2     F51  C~2HlF      
2017 07  04.48031  19 48 06.909  +66 17 50.63  21.4i 17NM2     F51  C~2HlF      
2017 07  06.45890  19 44 14.281  +66 10 37.21  20.8i 17NM2     F51  C~2HlF      
2017 07  06.47084  19 44 12.837  +66 10 34.09  21.0i 17NM2     F51  C~2HlF      
2017 07  06.48277  19 44 11.492  +66 10 31.41  21.1i 17NM2     F51  C~2HlF      
2017 07  06.49471  19 44 10.013  +66 10 28.63  20.8i 17NM2     F51  C~2HlF      
2017 07  08.46486  19 40 19.009  +66 02 11.96  20.9i 17NM2     F51  C~2HlF      
2017 07  08.47794  19 40 17.396  +66 02 08.49  21.2i 17NM2     F51  C~2HlF      
2017 07  08.50421  19 40 14.377  +66 02 01.39  21.3i 17NM2     F51  C~2HlF      
2017 07  10.45891  19 36 26.362  +65 52 43.78  21.1i 17NM2     F51  C~2HlF      
2017 07  10.47365  19 36 24.642  +65 52 39.22  21.6i 17NM2     F51  C~2HlF      
2017 07  10.48822  19 36 22.887  +65 52 34.67  20.9i 17NM2     F51  C~2HlF      
2017 07  10.50282  19 36 21.188  +65 52 30.38  21.2i 17NM2     F51  C~2HlF      
2017 07  12.43202  19 32 38.013  +65 42 15.71  21.7G 17NM2     F51  C~2jiV      
2017 07  12.44583  19 32 36.388  +65 42 11.12  22.1G 17NM2     F51  C~2jiV      
2017 07  12.45962  19 32 34.823  +65 42 06.55  21.1G 17NM2     F51  C~2jiV      
2017 07  12.47346  19 32 33.190  +65 42 01.97  21.3G 17NM2     F51  C~2jiV      
2017 07  15.44509  19 26 54.182  +65 24 12.32  21.0i 17NM2     F51  C~2Hvk      
2017 07  15.46148  19 26 52.299  +65 24 06.24  20.9i 17NM2     F51  C~2Hvk      
2017 07  15.47787  19 26 50.353  +65 23 59.54  20.8i 17NM2     F51  C~2Hvk      
2017 08  17.31309  18 38 00.832  +59 39 51.47  21.0G 17NM2     F51  C~2jiV      
2017 08  17.32699  18 37 59.978  +59 39 39.90  20.9G 17NM2     F51  C~2jiV      
2017 08  17.34086  18 37 59.125  +59 39 28.33  21.4G 17NM2     F51  C~2jiV      
2017 08  17.35477  18 37 58.275  +59 39 16.85  21.0G 17NM2     F51  C~2jiV      
2017 09  14.25667  18 21 23.627  +52 32 22.09  21.4w 17NM2     F51  C~2KZX      
2017 09  14.26957  18 21 23.436  +52 32 09.63  21.6w 17NM2     F51  C~2KZX      
2017 09  14.28250  18 21 23.256  +52 31 57.03  21.5w 17NM2     F51  C~2KZX      
2017 09  14.29540  18 21 23.067  +52 31 44.70  21.7w 17NM2     F51  C~2KZX      
2017 09  25.25275  18 20 10.17   +49 35 11.6   20.6V 17NM2     G96  C~2LUt      
2017 09  25.25847  18 20 10.11   +49 35 06.4   21.6V 17NM2     G96  C~2LUt      
2017 09  25.26423  18 20 10.11   +49 35 00.3   20.8V 17NM2     G96  C~2LUt      
2017 09  25.26990  18 20 10.05   +49 34 55.6   22.3V 17NM2     G96  C~2LUt      
2017 09  27.27505  18 20 12.421  +49 02 52.35  21.3G 17NM2     F51  C~2jiV      

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     2.15       0.00    -0.53
  2   0.0029      0.00     1.60       0.00    -0.46
  3   0.0029      0.00 (   2.33)      0.00 (  -0.42)
  4   0.0029      0.00     1.92       0.00    -0.44
  5   1.5167      0.00     0.51       0.00    -0.21
  6   1.5167      0.00     0.54       0.00    -0.05
  7   1.5167      0.00     0.71       0.00    -0.18
  8   1.5168      0.00     0.63       0.00    -0.12
  9   1.5932      0.00     1.49       0.00     0.25
 10   1.5932      0.00     0.97       0.00     0.22
 11   1.5932      0.00     1.96       0.00     0.36
 12   1.5987      0.00     1.28       0.00     0.23
 13   1.5987      0.00     0.94       0.00    -0.08
 14   1.5987      0.00     2.07       0.00     0.05
 15   1.5988      0.00     1.20       0.00     0.10
 16   1.6042      0.00     1.52       0.00     0.23
 17   1.6042      0.00     0.60       0.00     0.28
 18   1.6043      0.00     2.03       0.00     0.30
 19   1.6096      0.00     1.61       0.00     0.52
 20   1.6096      0.00     1.86       0.00     0.42
 21   1.6097      0.00     1.28       0.00     0.30
 22   1.6097      0.00     1.58       0.00     0.46
 23   1.6150      0.00     1.53       0.00     0.12
 24   1.6150      0.00     1.34       0.00     0.15
 25   1.6151      0.00     2.01       0.00     0.21
 26   1.6151      0.00     1.74       0.00     0.29
 27   1.6233      0.00     2.27       0.00     0.27
 28   1.6233      0.00     2.16       0.00     0.51
 29   1.6234      0.00     1.10       0.00     0.16
 30   1.7132      0.00     0.64       0.00     0.56
 31   1.7133      0.00     0.63       0.00     0.55
 32   1.7133      0.00     0.60       0.00     0.51
 33   1.7134      0.00     0.63       0.00     0.62
 34   1.7898      0.00    -0.18       0.00     0.94
 35   1.7898      0.00    -0.18       0.00     0.98
 36   1.7898      0.00    -0.03       0.00     0.91
 37   1.7899      0.00    -0.02       0.00     1.09
 38   1.8199      0.00     1.00       0.00     0.47
 39   1.8199      0.00     0.12       0.00     0.81
 40   1.8199      0.00     0.15       0.00     0.28
 41   1.8199      0.00    -0.73       0.00     1.07
 42   1.8254      0.00    -0.02       0.00     0.75

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.

17NM2    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        14.568    14.568    14.568
ecceobj         0.618     0.618     0.618
incobj        101.304   101.304   101.304
qmin            5.459     5.459     5.459
qmax           23.680    23.679    23.680
amean          14.569    14.569    14.569
amin           14.568    14.568    14.568
amax           14.569    14.569    14.570
emean           0.622     0.622     0.622
emin            0.618     0.618     0.618
emax            0.625     0.625     0.625
imean          99.766    99.766    99.766
imin           99.742    99.742    99.742
imax           99.791    99.791    99.791
excite_mean     1.165     1.165     1.165
fracstop        0.000     0.000     0.000
cjmean          1.876     1.876     1.876

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        88.4      88.4      88.4
kozaiamp          0.8       0.8       0.8