Orbit Fit and Astrometric record for 16NM56

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: 16NM56    
# Created Mon Oct 23 01:38:42 2017
# Orbit generated from Bernstein formalism
# Fitting   57 observations of   61
# Arc:   2.89y
# First observation: 2014/09/03
#  Last observation: 2017/07/26
Preliminary a, adot, b, bdot, g, gdot:
   0.038674  -0.272033  -0.018919   0.158270   0.148024   0.000000
# Chi-squared of fit:   238.95 DOF:  108 RMS:  0.36
# Min/Max residuals:    -1.21    0.81
# Exact a, adot, b, bdot, g, gdot:
 -3.317276E-05 -2.210105E-01  2.075958E-05  1.336710E-01  1.006326E-01 -4.920892E-02
# Covariance matrix:
  3.8783E-13 -3.1849E-13 -6.2812E-14  1.0028E-13  1.1408E-13  2.1023E-13
 -3.1849E-13  3.5876E-13  9.9123E-14 -1.5946E-13 -1.5351E-13 -3.3530E-13
 -6.2812E-14  9.9123E-14  3.0142E-13 -1.9027E-13 -3.5470E-14 -1.2376E-13
  1.0028E-13 -1.5946E-13 -1.9027E-13  1.6671E-13  4.7735E-14  2.0360E-13
  1.1408E-13 -1.5351E-13 -3.5470E-14  4.7735E-14  2.5924E-13  9.2735E-14
  2.1023E-13 -3.3530E-13 -1.2376E-13  2.0360E-13  9.2735E-14  4.3182E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
  -18.507016   18.619720    0.621058   -0.253271   -0.756990  2456904.050788
# Heliocentric elements and errors
Epoch:              2456900.5000  =  2014/08/31
Mean Anomaly:          359.35592 +/-     0.000
Argument of Peri:      345.72395 +/-     0.000
Long of Asc Node:      350.02398 +/-     0.000
Inclination:           144.04108 +/-     0.000
Eccentricity:         0.85648484 +/-    0.0000
Semi-Major Axis:     73.34610473 +/-    0.0127
Time of Perihelion: 2457310.9898 +/-       0.0
Perihelion:          10.52627759 +/-    0.0025
Aphelion:           136.16593186 +/-    0.0237
Period (y)              628.1651 +/-      0.16
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            9.88261418 +/-    0.0000
Ecliptic Y            2.67616147 +/-    0.0000
Ecliptic Z           -3.15404656 +/-    0.0000
Ecliptic XDOT         0.00180588 +/-    0.0000
Ecliptic YDOT        -0.00573938 +/-    0.0000
Ecliptic ZDOT         0.00387371 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   10.71335208 +/-    0.0000
Geocenter to KBO      9.93714193 +/-    0.0001
# Hcoef: 11.28

The following table shows the complete astrometric record for 16NM56. 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 (16NM56) followed by the observatory code and reference code for the source of the astrometry.

2014 09  03.55001  01 36 50.325  -09 50 01.82  21.6w 16NM56    F51  C~1x98      
2014 09  03.56196  01 36 50.009  -09 50 03.48  21.8w 16NM56    F51  C~1x98      
2014 10  27.35240  01 08 55.782  -11 40 30.77  21.4w 16NM56    F51  C~1x98      
2014 10  27.39222  01 08 54.495  -11 40 33.49  21.6w 16NM56    F51  C~1x98      
2015 08  09.57810  00 46 51.752  -06 21 50.20  21.1i 16NM56    F51  C~1x98      
2015 08  09.61277  00 46 50.958  -06 21 53.59  21.2i 16NM56    F51  C~1x98      
2016 07  14.56561  23 55 57.295  -02 50 38.08  21.8w 16NM56    F51  C~1x98      
2016 07  14.57759  23 55 57.074  -02 50 38.45  21.9w 16NM56    F51  C~1x98      
2016 07  14.58959  23 55 56.862  -02 50 38.92  21.7w 16NM56    F51  C~1x98      
2016 07  14.60156  23 55 56.639  -02 50 39.25  21.9w 16NM56    F51  C~1x98      
2016 07  15.36911  23 55 42.72   -02 51 08.6   21.0R 16NM56    291  C~1x98      
2016 07  15.40659  23 55 42.02   -02 51 10.4   21.2R 16NM56    291  C~1x98      
2016 07  15.43748  23 55 41.48   -02 51 11.3         16NM56    291  C~1x98      
2016 07  17.355632 23 55 05.74   -02 52 30.4   22.3V 16NM56    H21  C~1x98      
2016 07  17.362949 23 55 05.58   -02 52 30.7   21.7V 16NM56    H21  C~1x98      
2016 07  17.375953 23 55 05.30   -02 52 31.3   22.0V 16NM56    H21  C~1x98      
2016 07  29.317307 23 50 52.06   -03 03 28.3   21.1R 16NM56    705  C~1x98      
2016 07  29.318329 23 50 52.03   -03 03 28.7   21.3R 16NM56    705  C~1x98      
2016 07  29.319350 23 50 51.99   -03 03 28.5   21.1R 16NM56    705  C~1x98      
2016 07  30.300689 23 50 28.89   -03 04 34.4   22.2V 16NM56    H21  C~1x98      
2016 07  30.315621 23 50 28.51   -03 04 35.4   21.5V 16NM56    H21  C~1x98      
2016 07  30.327544 23 50 28.25   -03 04 35.8   21.4R 16NM56    W86  C~1x98      
2016 07  30.331977 23 50 28.13   -03 04 36.5   22.1V 16NM56    H21  C~1x98      
2016 07  30.335407 23 50 28.06   -03 04 36.3   21.2R 16NM56    W86  C~1x98      
2016 07  30.341228 23 50 27.92   -03 04 37.2   22.0V 16NM56    H21  C~1x98      
2016 07  30.343267 23 50 27.87   -03 04 36.8   21.3R 16NM56    W86  C~1x98      
2016 07  30.351227 23 50 27.67   -03 04 38.0   22.1V 16NM56    H21  C~1x98      
2016 07  30.523994 23 50 23.591  -03 04 49.85  21.2R 16NM56    568  C~1x98      
2016 07  30.527874 23 50 23.498  -03 04 50.18  21.1R 16NM56    568  C~1x98      
2016 07  31.76580  23 49 53.78   -03 06 15.9         16NM56    Q62  C~1x98      
2016 07  31.77021  23 49 53.64   -03 06 16.3   21.7w 16NM56    Q62  C~1x98      
2016 08  04.30009  23 48 26.26   -03 10 36.6   21.3R 16NM56    W96  C~2KZN      
2016 08  06.38931  23 47 32.64   -03 13 23.2   21.1R 16NM56    291  C~1x98      
2016 08  06.40053  23 47 32.32   -03 13 24.7   21.3R 16NM56    291  C~1x98      
2016 08  06.41175  23 47 32.02   -03 13 25.5   21.7R 16NM56    291  C~1x98      
2016 08  06.502657 23 47 29.668  -03 13 33.05  21.0R 16NM56    568  C~1x98      
2016 08  06.506606 23 47 29.567  -03 13 33.35  21.0R 16NM56    568  C~1x98      
2016 08  07.44589  23 47 04.94   -03 14 50.0   21.5R 16NM56    291  C~1x98      
2016 08  07.45265  23 47 04.76   -03 14 50.7   21.5R 16NM56    291  C~1x98      
2016 08  07.45940  23 47 04.57   -03 14 51.0   21.4R 16NM56    291  C~1x98      
2016 08  24.28568  23 39 03.99   -03 41 07.4   21.3R 16NM56    291  C~1x98      
2016 08  24.29316  23 39 03.73   -03 41 08.1   20.7R 16NM56    291  C~1x98      
2016 08  24.30063  23 39 03.55   -03 41 08.5   20.9R 16NM56    291  C~1x98      
2016 08  26.36365  23 38 00.26   -03 44 42.9         16NM56    291  C~1x98      
2016 08  26.38453  23 37 59.64   -03 44 45.7         16NM56    291  C~1x98      
2016 08  26.40630  23 37 58.95   -03 44 47.9         16NM56    291  C~1x98      
2016 08  28.34098  23 36 58.90   -03 48 12.0   21.4V 16NM56    691  C~1x98      
2016 08  28.35538  23 36 58.46   -03 48 13.6   21.8V 16NM56    691  C~1x98      
2016 08  28.36975  23 36 57.98   -03 48 14.7   21.4V 16NM56    691  C~1x98      
2016 08  29.22500  23 36 31.33   -03 49 45.9   22.1R 16NM56    291  C~1x98      
2016 08  29.27962  23 36 29.64   -03 49 52.0   21.3R 16NM56    291  C~1x98      
2016 09  12.35075  23 28 59.01   -04 15 33.4   21.7V 16NM56    G96  C~1xhn      
2016 09  12.36509  23 28 58.53   -04 15 34.9   21.6V 16NM56    G96  C~1xhn      
2016 09  12.37094  23 28 58.38   -04 15 35.6   21.4V 16NM56    G96  C~1xhn      
2016 09  12.38532  23 28 57.88   -04 15 38.6   20.7V 16NM56    G96  C~1xhn      
2017 07  26.51263  22 54 27.202  +00 12 32.21  21.8w 16NM56    F51  C~2IDV      
2017 07  26.52536  22 54 26.877  +00 12 31.67  21.8w 16NM56    F51  C~2IDV      
2017 07  26.55092  22 54 26.213  +00 12 30.15  21.8w 16NM56    F51  C~2IDV      
2017 09  12.31635  22 31 00.193  -00 51 54.64  21.5w 16NM56    F51  C~2KZN      
2017 09  12.32798  22 30 59.848  -00 51 55.64  21.6w 16NM56    F51  C~2KZN      
2017 09  12.33960  22 30 59.491  -00 51 56.74  21.7w 16NM56    F51  C~2KZN      

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     0.05
  2   0.0000     -4.95    -0.34       0.25     0.19
  3   0.1473 -25499.74     0.40    3051.33    -0.06
  4   0.1474 -25518.64     0.55    3055.68    -0.09
  5   0.9309 -37452.43    -0.20   28446.60    -0.39
  6   0.9310 -37465.23    -0.28   28447.81    -0.06
  7   1.8618 -80984.25     0.00   59723.43    -0.16
  8   1.8618 -80988.16    -0.01   59724.51    -0.07
  9   1.8618 -80991.96     0.12   59725.42    -0.14
 10   1.8619 -80995.90     0.09   59726.56     0.01
 11   1.8640 -81244.79    -0.58   59788.11     0.28
 12   1.8641 -81257.43    -0.79   59790.86    -0.04
 13   1.8642 -81267.01    -0.11   59793.50     0.07
 14   1.8694 -81908.48     0.45   59947.75    -0.54
 15   1.8694 -81911.33     0.13   59948.50    -0.39
 16   1.8695 -81916.36    -0.39   59949.73    -0.24
 17   1.9022 -86538.77     0.61   60946.38    -0.33
 18   1.9022 -86539.43     0.39   60946.15    -0.64
 19   1.9022 -86540.06     0.21   60946.64    -0.25
 20   1.9049 -86967.68     0.20   61031.71     0.30
 21   1.9049 -86974.69    -0.18   61033.20     0.48
 22   1.9049 -86979.39     0.30   61034.53    -0.41
 23   1.9049 -86981.74     0.04   61034.58     0.42
 24   1.9050 -86982.90     0.30   61035.27    -0.36
 25   1.9050 -86985.66     0.22   61035.25     0.27
 26   1.9050 -86986.40     0.29   61036.02    -0.31
 27   1.9050 -86990.33     0.00   61036.07     0.21
 28   1.9055 -87065.98     0.18   61050.88    -0.15
 29   1.9055 -87067.73     0.17   61051.15    -0.22
 30   1.9089 -87619.37     0.07   61159.74    -0.03
 31   1.9089 -87621.97    -0.52   61160.26     0.09
 32   1.9185 -89253.34 (   0.79)  61471.49 (   1.60)
 33   1.9243 -90261.66     0.76   61655.64     0.54
 34   1.9243 -90267.86     0.12   61656.19     0.06
 35   1.9243 -90273.47     0.07   61657.36     0.21
 36   1.9246 -90317.87    -0.02   61665.19    -0.22
 37   1.9246 -90319.77     0.05   61665.55    -0.22
 38   1.9272 -90784.28    -0.16   61750.15     0.03
 39   1.9272 -90787.73    -0.21   61750.62    -0.13
 40   1.9272 -90791.22    -0.30   61751.59     0.22
 41   1.9733-100050.55    -0.37   63333.32     0.05
 42   1.9733-100055.60    -0.90   63334.36     0.34
 43   1.9733-100059.06     0.15   63335.17     0.40
 44   1.9790-101305.63     0.35   63538.65     0.49
 45   1.9790-101318.11     0.72   63539.86    -0.41
 46   1.9791-101331.69     0.54   63542.24    -0.24
 47   1.9844-102520.40    -0.41   63735.13     0.32
 48   1.9844-102529.17    -0.18   63736.42     0.14
 49   1.9844-102538.51    -0.55   63738.56     0.81
 50   1.9868-103068.08    -0.02   63823.66     0.53
 51   1.9869-103101.81     0.54   63828.70     0.00
 52   2.0255-112230.15    -0.30   65285.55     0.38
 53   2.0255-112240.01    -0.48   65287.28     0.55
 54   2.0255-112243.17     0.30   65287.56     0.19
 55   2.0256-112253.92    -0.75   65287.72    -1.21
 56   2.8938-151823.85    -0.03  102670.15     0.07
 57   2.8938-151831.96     0.12  102672.74     0.03
 58   2.8939-151848.68    -0.01  102677.47    -0.52
 59   3.0247-190849.95 (   0.72) 112702.74 (  -0.53)
 60   3.0247-190860.48 (   1.03) 112705.37 (  -0.32)
 61   3.0247-190871.40 (   0.94) 112707.99 (  -0.12)

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.

16NM56    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        71.082    71.101    71.064
ecceobj         0.852     0.852     0.852
incobj        144.068   144.068   144.069
qmin           10.281    10.309    10.304
qmax          139.245   136.502   134.216
amean          71.957    71.665    69.966
amin           70.877    69.628    67.218
amax           74.867    73.535    72.416
emean           0.854     0.853     0.849
emin            0.849     0.847     0.840
emax            0.860     0.857     0.856
imean         144.797   144.777   145.019
imin          144.424   144.303   144.425
imax          145.341   145.244   145.779
excite_mean     1.030     1.030     1.025
fracstop        0.014     0.010     0.009
cjmean         -0.907    -0.906    -0.898

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       350.6     349.9     349.8
kozaiamp          5.3       4.5       4.8