Orbit Fit and Astrometric record for 17RG16

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: 17RG16    
# Created Thu Oct 18 01:10:00 2018
# Orbit generated from Bernstein formalism
# Fitting   75 observations of   81
# Arc:   1.14y
# First observation: 2017/07/25
#  Last observation: 2018/09/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.021810   0.130756  -0.014941   0.530037   0.133059   0.000000
# Chi-squared of fit:   244.91 DOF:  144 RMS:  0.32
# Min/Max residuals:    -1.15    0.88
# Exact a, adot, b, bdot, g, gdot:
  1.302841E-05  1.149486E-01  5.054253E-05  4.800402E-01  1.516996E-01  4.551087E-04
# Covariance matrix:
  1.1117E-13 -5.6640E-14  7.1678E-15  4.0363E-16  7.1339E-14  1.2941E-14
 -5.6640E-14  1.3040E-13 -4.2333E-14  2.7781E-13  1.1467E-14  4.4380E-13
  7.1678E-15 -4.2333E-14  1.0469E-13 -4.7467E-13 -2.4226E-14 -6.8322E-13
  4.0363E-16  2.7781E-13 -4.7467E-13  2.9661E-12  2.1127E-13  4.5910E-12
  7.1339E-14  1.1467E-14 -2.4226E-14  2.1127E-13  8.7336E-14  3.5106E-13
  1.2941E-14  4.4380E-13 -6.8322E-13  4.5910E-12  3.5106E-13  7.3620E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -36.214072   -1.502409    0.835519   -0.338037   -0.461794  2457960.126221
# Heliocentric elements and errors
Epoch:              2457960.5000  =  2017/07/26
Mean Anomaly:            0.04971 +/-     0.000
Argument of Peri:      323.02764 +/-     0.001
Long of Asc Node:        0.54424 +/-     0.000
Inclination:            74.90320 +/-     0.000
Eccentricity:         0.90739595 +/-    0.0000
Semi-Major Axis:     76.74205506 +/-    0.0111
Time of Perihelion: 2457926.5961 +/-       0.0
Perihelion:           7.10662509 +/-    0.0014
Aphelion:           146.37748503 +/-    0.0211
Period (y)              672.2926 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            5.86443910 +/-    0.0000
Ecliptic Y           -0.99485736 +/-    0.0000
Ecliptic Z           -3.89425320 +/-    0.0000
Ecliptic XDOT         0.00518240 +/-    0.0000
Ecliptic YDOT         0.00193360 +/-    0.0000
Ecliptic ZDOT         0.00698504 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    7.10961287 +/-    0.0000
Geocenter to KBO      6.59197649 +/-    0.0000
# Hcoef: 11.51

The following table shows the complete astrometric record for 17RG16. 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 (17RG16) followed by the observatory code and reference code for the source of the astrometry.

2017 07  25.62542  00 59 51.867  -33 23 56.47  19.9G 17RG16    F51  C~2jiV      
2017 07  25.63009  00 59 51.778  -33 23 57.11  19.9G 17RG16    F51  C~2jiV      
2017 07  26.62905  00 59 34.417  -33 25 37.36  20.3G 17RG16    F51  C~2jiV      
2017 08  06.52418  00 55 39.995  -33 44 34.65  19.7i 17RG16    F51  C~2Y59      
2017 08  06.53399  00 55 39.743  -33 44 35.50  19.7i 17RG16    F51  C~2Y59      
2017 08  06.54377  00 55 39.501  -33 44 36.46  19.7i 17RG16    F51  C~2Y59      
2017 08  06.55357  00 55 39.259  -33 44 37.56  19.7i 17RG16    F51  C~2Y59      
2017 09  12.42460  00 33 28.345  -34 23 08.68  20.0i 17RG16    F51  C~2KwB      
2017 09  12.43363  00 33 27.943  -34 23 08.45  20.1i 17RG16    F51  C~2KwB      
2017 09  12.44261  00 33 27.543  -34 23 08.51  19.9i 17RG16    F51  C~2KwB      
2017 09  12.45162  00 33 27.144  -34 23 08.46  19.9i 17RG16    F51  C~2KwB      
2017 09  14.074205 00 32 15.12   -34 22 41.7   19.9G 17RG16    K91  C~2KwB      
2017 09  14.077852 00 32 14.95   -34 22 41.6   19.7G 17RG16    K91  C~2KwB      
2017 09  14.081501 00 32 14.79   -34 22 41.5   19.7G 17RG16    K91  C~2KwB      
2017 09  14.085146 00 32 14.62   -34 22 41.3   19.8G 17RG16    K91  C~2KwB      
2017 09  16.55904  00 30 23.91   -34 21 32.5   19.8R 17RG16    474  C~2KwB      
2017 09  16.56256  00 30 23.69   -34 21 32.7   19.7R 17RG16    474  C~2KwB      
2017 09  16.56608  00 30 23.56   -34 21 32.5   19.6R 17RG16    474  C~2KwB      
2017 09  16.56889  00 30 23.40   -34 21 32.5   19.3R 17RG16    474  C~2KwB      
2017 09  18.33115  00 29 03.78   -34 20 21.5   19.6V 17RG16    807  C~2KwB      
2017 09  18.33285  00 29 03.71   -34 20 21.2   19.8V 17RG16    807  C~2KwB      
2017 09  18.33458  00 29 03.63   -34 20 21.1   19.9V 17RG16    807  C~2KwB      
2017 09  19.54301  00 28 08.94   -34 19 21.4         17RG16    Q62  C~2Uf0      
2017 09  19.54627  00 28 08.80   -34 19 20.8   19.4w 17RG16    Q62  C~2Uf0      
2017 09  20.500589 00 27 25.324  -34 18 29.27  19.4G 17RG16    568  C~2KwB      
2017 09  20.501764 00 27 25.272  -34 18 29.20  19.3G 17RG16    568  C~2KwB      
2017 09  20.502939 00 27 25.216  -34 18 29.13  19.3G 17RG16    568  C~2KwB      
2017 09  23.407433 00 25 12.837  -34 15 11.10  19.5G 17RG16    568  C~2LVe      
2017 09  23.409574 00 25 12.740  -34 15 10.93  19.2G 17RG16    568  C~2LVe      
2017 09  23.412131 00 25 12.621  -34 15 10.80  19.9G 17RG16    568  C~2LVe      
2017 09  23.414119 00 25 12.528  -34 15 10.61  19.8G 17RG16    568  C~2LVe      
2017 10  16.49110  00 08 15.17   -33 16 07.9   19.5R 17RG16    474  C~2NQP      
2017 10  16.49533  00 08 14.98   -33 16 06.9   19.7R 17RG16    474  C~2NQP      
2017 10  16.49955  00 08 14.79   -33 16 06.0   20.0R 17RG16    474  C~2NQP      
2017 10  23.46870  00 03 41.28   -32 46 58.2   20.2R 17RG16    Q62  C~2Nqo      
2017 10  23.49034  00 03 40.46   -32 46 52.4   20.5R 17RG16    Q62  C~2Nqo      
2017 10  23.51294  00 03 39.59   -32 46 46.3   20.6R 17RG16    Q62  C~2Nqo      
2017 10  23.53214  00 03 38.84   -32 46 41.0   20.2R 17RG16    Q62  C~2Nqo      
2017 11  11.42703  23 53 34.82   -31 04 57.5   19.7R 17RG16    474  C~2PmI      
2017 11  11.43103  23 53 34.71   -31 04 56.0   20.1R 17RG16    474  C~2PmI      
2017 11  11.43503  23 53 34.62   -31 04 54.5   20.3R 17RG16    474  C~2PmI      
2017 12  07.11078  23 46 15.19   -28 08 43.8         17RG16    691  C~2SFX      
2017 12  07.12293  23 46 15.12   -28 08 39.2   20.6R 17RG16    691  C~2SFX      
2017 12  07.13491  23 46 15.06   -28 08 33.5         17RG16    691  C~2SFX      
2017 12  19.07943  23 45 20.65   -26 38 10.6   20.1R 17RG16    691  C~2TL7      
2017 12  19.09058  23 45 20.63   -26 38 04.3   19.9R 17RG16    691  C~2TL8      
2017 12  19.10084  23 45 20.63   -26 38 00.9   20.7R 17RG16    691  C~2TL8      
2017 12  21.10725  23 45 20.14   -26 22 32.8   20.2R 17RG16    691  C~2TL8      
2017 12  21.11869  23 45 20.11   -26 22 28.0   20.7R 17RG16    691  C~2TL8      
2017 12  21.13016  23 45 20.11   -26 22 22.2   20.5R 17RG16    691  C~2TL8      
2018 01  05.08892  23 46 26.82   -24 25 54.7   20.8V 17RG16    691  C~2Uf0      
2018 01  05.09743  23 46 26.90   -24 25 50.8   20.9V 17RG16    691  C~2Uf0      
2018 01  05.10585  23 46 27.04   -24 25 46.8   20.3V 17RG16    691  C~2Uf0      
2018 01  06.07201  23 46 35.22   -24 18 13.9   20.3V 17RG16    691  C~2V02      
2018 01  06.08492  23 46 35.35   -24 18 07.7   20.3V 17RG16    691  C~2V02      
2018 01  06.09760  23 46 35.48   -24 18 01.5   20.8V 17RG16    691  C~2V02      
2018 01  19.07677  23 49 06.65   -22 36 52.0   20.2R 17RG16    691  C~2VWy      
2018 01  19.08448  23 49 06.72   -22 36 48.5   20.3R 17RG16    691  C~2VWy      
2018 01  19.09215  23 49 06.83   -22 36 44.4   20.3R 17RG16    691  C~2VWy      
2018 09  06.12075  00 16 02.27   -06 19 29.2   19.9R 17RG16    W49  C~2kSs      
2018 09  06.17293  00 16 00.42   -06 19 27.9   19.4R 17RG16    W49  C~2kSs      
2018 09  06.22509  00 15 58.69   -06 19 27.2   19.7R 17RG16    W49  C~2kSs      
2018 09  07.39528  00 15 19.44   -06 18 46.4   20.1G 17RG16    G96  C~2kSs      
2018 09  07.40036  00 15 19.27   -06 18 46.2   20.1G 17RG16    G96  C~2kSs      
2018 09  07.40544  00 15 19.06   -06 18 46.0   19.8G 17RG16    G96  C~2kSs      
2018 09  07.41053  00 15 18.90   -06 18 46.2   19.8G 17RG16    G96  C~2kSs      
2018 09  09.60997  00 14 04.35   -06 17 27.4         17RG16    Q62  C~2kSs      
2018 09  09.62336  00 14 03.92   -06 17 26.7         17RG16    Q62  C~2kSs      
2018 09  10.34690  00 13 39.12   -06 17 02.0         17RG16    U69  C~2kSs      
2018 09  10.34933  00 13 39.01   -06 17 02.5         17RG16    U69  C~2kSs      
2018 09  11.69188  00 12 52.85   -06 16 14.5   20.0R 17RG16    D29  C~2kSs      
2018 09  11.71158  00 12 52.15   -06 16 13.7   19.7R 17RG16    D29  C~2kSs      
2018 09  11.73128  00 12 51.45   -06 16 13.2   20.1R 17RG16    D29  C~2kSs      
2018 09  13.27728  00 11 58.06   -06 15 16.6   19.5G 17RG16    703  C~2kSs      
2018 09  13.28267  00 11 57.84   -06 15 15.7   19.7G 17RG16    703  C~2kSs      
2018 09  13.28806  00 11 57.64   -06 15 15.4   20.8G 17RG16    703  C~2kSs      
2018 09  13.29344  00 11 57.42   -06 15 16.3   20.4G 17RG16    703  C~2kSs      
2018 09  14.26780  00 11 23.59   -06 14 40.4   19.6G 17RG16    G96  C~2kSs      
2018 09  14.27761  00 11 23.24   -06 14 39.9   20.1G 17RG16    G96  C~2kSt      
2018 09  14.28330  00 11 23.04   -06 14 39.6   19.9G 17RG16    G96  C~2kSt      
2018 09  14.28899  00 11 22.85   -06 14 39.5   19.9G 17RG16    G96  C~2kSt      

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    -0.22       0.00    -0.10
  2   0.0000     -1.28    -0.37      -0.03    -0.21
  3   0.0027   -240.17    -0.15      15.27     0.55
  4   0.0326  -3359.95    -0.31     393.68     0.04
  5   0.0326  -3363.13    -0.20     394.40     0.20
  6   0.0326  -3366.25    -0.04     394.96     0.20
  7   0.0327  -3369.43     0.06     395.40     0.08
  8   0.1336 -19276.00    -0.22    5673.61     0.35
  9   0.1336 -19280.47    -0.13    5675.93     0.46
 10   0.1337 -19285.03    -0.16    5677.96     0.31
 11   0.1337 -19289.54    -0.13    5680.09     0.25
 12   0.1381 -20096.71     0.02    6079.85    -0.31
 13   0.1381 -20098.61    -0.04    6080.82    -0.26
 14   0.1381 -20100.38     0.02    6081.74    -0.27
 15   0.1382 -20102.23     0.00    6082.81    -0.13
 16   0.1449 -21335.32     0.57    6718.73    -0.22
 17   0.1449 -21337.91    -0.25    6719.68    -0.20
 18   0.1449 -21339.31     0.13    6720.53    -0.29
 19   0.1450 -21341.14    -0.28    6721.35    -0.21
 20   0.1498 -22222.12    -0.07    7195.62    -0.07
 21   0.1498 -22222.80     0.11    7196.25     0.09
 22   0.1498 -22223.68     0.10    7196.76     0.11
 23   0.1531 -22825.89     0.31    7531.26     0.20
 24   0.1531 -22827.25     0.60    7532.52     0.55
 25   0.1557 -23305.27     0.03    7801.45    -0.15
 26   0.1557 -23305.83     0.06    7801.78    -0.16
 27   0.1557 -23306.45     0.04    7802.13    -0.15
 28   0.1637 -24750.63    -0.01    8654.98    -0.17
 29   0.1637 -24751.68     0.02    8655.63    -0.17
 30   0.1637 -24753.00    -0.02    8656.35    -0.23
 31   0.1637 -24753.99    -0.01    8656.99    -0.19
 32   0.2269 -35403.91     0.35   16945.25    -0.31
 33   0.2269 -35405.84     0.18   16947.10    -0.21
 34   0.2269 -35407.81    -0.03   16948.85    -0.20
 35   0.2460 -38106.10     0.36   19903.80     0.20
 36   0.2460 -38114.09     0.39   19913.20     0.10
 37   0.2461 -38122.59     0.26   19923.11     0.09
 38   0.2462 -38129.90     0.05   19931.70     0.24
 39   0.2979 -43582.12    -0.08   28649.84    -0.24
 40   0.2979 -43583.03    -0.13   28651.82    -0.20
 41   0.2979 -43583.67     0.08   28653.70    -0.25
 42   0.3682 -45847.57    -0.45   41175.10    -0.15
 43   0.3682 -45847.02    -0.21   41180.04    -1.15
 44   0.3683 -45845.97     0.53   41186.02    -1.01
 45   0.4010 -44817.77     0.13   46894.87     0.08
 46   0.4010 -44815.99 (   0.43)  46901.32 (   1.26)
 47   0.4010 -44814.89     0.18   46904.75    -0.16
 48   0.4065 -44518.80     0.40   47843.06     0.27
 49   0.4066 -44517.64    -0.16   47848.05    -0.10
 50   0.4066 -44515.75     0.00   47853.90     0.37
 51   0.4475 -41289.72    -0.58   54589.01     0.56
 52   0.4476 -41287.31    -0.44   54592.56     0.39
 53   0.4476 -41284.03     0.60   54595.89     0.04
 54   0.4502 -41019.04    -0.53   55013.58     0.28
 55   0.4503 -41015.16    -0.18   55019.20     0.30
 56   0.4503 -41011.28     0.23   55024.82     0.41
 57   0.4858 -36839.23     0.10   60402.30     0.25
 58   0.4859 -36837.04    -0.47   60405.50     0.36
 59   0.4859 -36834.09    -0.25   60409.09     0.88
 60   1.1157  10823.27 (   0.92) 113445.37 (   1.79)
 61   1.1158  10795.40 (  -0.71) 113461.50 (   1.92)
 62   1.1159  10769.08    -0.72  113475.98     0.35
 63   1.1192  10183.72     0.36  113834.20    -0.21
 64   1.1192  10181.19     0.43  113835.78    -0.21
 65   1.1192  10178.05    -0.12  113837.68     0.10
 66   1.1192  10175.48    -0.10  113838.70    -0.46
 67   1.1252   9061.93     0.54  114521.35    -0.51
 68   1.1253   9055.62 (   1.17) 114525.58 (  -0.50)
 69   1.1272   8683.75     0.51  114751.06     0.63
 70   1.1272   8681.80    -0.17  114751.33     0.14
 71   1.1309   7989.69    -0.18  115173.72     0.05
 72   1.1310   7979.22    -0.31  115180.22     0.25
 73   1.1310   7968.61    -0.59  115186.35     0.09
 74   1.1353   7167.04     0.68  115676.67    -0.02
 75   1.1353   7164.06 (   0.54) 115679.50 (   1.06)
 76   1.1353   7161.09 (   0.43) 115681.44 (   1.27)
 77   1.1353   7157.24    -0.57  115682.10     0.20
 78   1.1380   6648.48     0.01  115993.10    -0.33
 79   1.1380   6643.27     0.01  115996.47    -0.14
 80   1.1380   6640.30     0.07  115998.42    -0.03
 81   1.1380   6637.39     0.18  116000.04    -0.25

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.

17RG16    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        74.235    74.271    74.199
ecceobj         0.904     0.904     0.904
incobj         75.099    75.099    75.098
qmin            5.442     5.221     6.395
qmax          398.296   198.406   152.065
amean         129.346    70.909    72.751
amin           74.235    55.909    65.010
amax          202.168   101.838    79.529
emean           0.948     0.910     0.906
emin            0.903     0.886     0.895
emax            0.971     0.948     0.917
imean          73.467    74.417    75.166
imin           71.441    72.691    74.256
imax           76.280    76.263    76.278
excite_mean     1.348     1.325     1.325
fracstop        0.094     0.044     0.014
cjmean          0.604     0.756     0.738

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       301.6     302.1     315.9
kozaiamp         18.9      22.1       7.8