Orbit Fit and Astrometric record for 12YG12

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: 12YG12    
# Created Wed Jun  3 01:10:52 2020
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  110 observations of  110
# Arc:   5.17y
# First observation: 2012/11/08
#  Last observation: 2018/01/10
# Chi-squared of fit:   115.88 DOF:  214 RMS:  0.18
# Min/Max residuals:    -0.79    0.79
# Exact a, adot, b, bdot, g, gdot:
  1.727121E-05  2.888811E-02  7.018401E-06  1.283522E-02  2.893499E-02 -5.771584E-03
# Covariance matrix:
  1.4511E-13 -7.9166E-14  3.1487E-14 -2.8892E-14 -7.2699E-15 -3.8540E-13
 -7.9166E-14  6.7781E-14 -3.4344E-14  3.0740E-14  2.8049E-14  4.0894E-13
  3.1487E-14 -3.4344E-14  1.0304E-13 -4.0883E-14 -1.6919E-14 -2.3365E-13
 -2.8892E-14  3.0740E-14 -4.0883E-14  2.3478E-14  1.3779E-14  2.0950E-13
 -7.2699E-15  2.8049E-14 -1.6919E-14  1.3779E-14  4.9310E-14  1.8129E-13
 -3.8540E-13  4.0894E-13 -2.3365E-13  2.0950E-13  1.8129E-13  2.7876E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -20.837693   77.094186    0.504833   -0.301977   -0.793547  2456240.074728
# Heliocentric elements and errors
Epoch:              2456240.5000  =  2012/11/09
Mean Anomaly:          310.89923 +/-     0.004
Argument of Peri:       28.67138 +/-     0.008
Long of Asc Node:      114.53219 +/-     0.000
Inclination:            30.88409 +/-     0.000
Eccentricity:         0.21676592 +/-    0.0001
Semi-Major Axis:     39.68276732 +/-    0.0015
Time of Perihelion: 2468693.8786 +/-       4.5
Perihelion:          31.08089568 +/-    0.0024
Aphelion:            48.28463896 +/-    0.0027
Period (y)              249.9834 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            7.89687607 +/-    0.0001
Ecliptic Y           32.20122580 +/-    0.0002
Ecliptic Z          -12.29362778 +/-    0.0001
Ecliptic XDOT        -0.00268792 +/-    0.0000
Ecliptic YDOT         0.00053600 +/-    0.0000
Ecliptic ZDOT         0.00132944 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.36129176 +/-    0.0002
Geocenter to KBO     34.56037803 +/-    0.0003
# Hcoef:  6.84

The following table shows the complete astrometric record for 12YG12. 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 (12YG12) followed by the observatory code and reference code for the source of the astrometry.

2012 11  08.57395  05 11 46.448  +02 03 47.07  21.9G 12YG12    F51  C~3468      
2012 12  07.45976  05 09 07.435  +01 59 00.32  21.9G 12YG12    F51  C~3468      
2012 12  12.49490  05 08 37.680  +01 59 02.03  21.5G 12YG12    F51  C~3468      
2012 12  30.42489  05 06 54.920  +02 01 22.58  22.2G 12YG12    F51  C~3468      
2012 12  30.43776  05 06 54.828  +02 01 23.30  22.3G 12YG12    F51  C~3468      
2013 11  01.59522  05 18 42.558  +02 59 01.30  21.6G 12YG12    F51  C~3468      
2013 11  01.60701  05 18 42.542  +02 59 01.22  21.8G 12YG12    F51  C~3468      
2013 11  29.53488  05 16 19.664  +02 52 45.98  21.9G 12YG12    F51  C~3468      
2013 11  29.54898  05 16 19.561  +02 52 45.97  22.5G 12YG12    F51  C~3468      
2013 11  29.56309  05 16 19.470  +02 52 46.00  22.0G 12YG12    F51  C~3468      
2013 11  29.57728  05 16 19.407  +02 52 45.73  21.5G 12YG12    F51  C~3468      
2013 12  11.38615  05 15 09.819  +02 52 16.15  21.8G 12YG12    F51  C~3468      
2013 12  11.39970  05 15 09.742  +02 52 15.90  22.8G 12YG12    F51  C~3468      
2013 12  11.41296  05 15 09.656  +02 52 15.68  21.9G 12YG12    F51  C~3468      
2013 12  11.42567  05 15 09.628  +02 52 15.69  22.5G 12YG12    F51  C~3468      
2013 12  29.43031  05 13 24.539  +02 54 20.21        12YG12    F51  C~3468      
2014 02  25.28608  05 10 06.889  +03 21 52.56  22.1G 12YG12    F51  C~3468      
2014 02  28.24966  05 10 05.928  +03 23 53.10  22.6G 12YG12    F51  C~3468      
2014 02  28.26183  05 10 05.931  +03 23 53.73  22.3G 12YG12    F51  C~3468      
2014 02  28.27396  05 10 05.930  +03 23 54.42  22.3G 12YG12    F51  C~3468      
2014 02  28.28608  05 10 05.921  +03 23 54.73  22.1G 12YG12    F51  C~3468      
2014 11  20.52028  05 23 41.054  +03 47 41.55  22.9G 12YG12    F51  C~3468      
2014 11  20.53359  05 23 40.986  +03 47 41.53  23.1G 12YG12    F51  C~3468      
2014 11  20.54685  05 23 40.917  +03 47 41.10  23.3G 12YG12    F51  C~3468      
2014 11  20.56021  05 23 40.834  +03 47 40.95  22.8G 12YG12    F51  C~3468      
2014 12  02.43997  05 22 33.715  +03 46 12.84  21.5G 12YG12    F51  C~3468      
2015 01  15.37180  05 18 24.557  +03 52 55.61  21.5G 12YG12    F51  C~3468      
2015 01  15.38419  05 18 24.479  +03 52 55.97  22.2G 12YG12    F51  C~3468      
2015 01  15.39655  05 18 24.433  +03 52 56.07  22.0G 12YG12    F51  C~3468      
2015 01  15.40893  05 18 24.371  +03 52 56.38  22.4G 12YG12    F51  C~3468      
2015 01  17.35253  05 18 15.247  +03 53 40.88  22.2G 12YG12    F51  C~3468      
2015 01  17.36649  05 18 15.178  +03 53 41.15  22.2G 12YG12    F51  C~3468      
2015 01  17.38030  05 18 15.119  +03 53 41.52  22.2G 12YG12    F51  C~3468      
2015 01  17.39411  05 18 15.046  +03 53 41.88  22.0G 12YG12    F51  C~3468      
2015 02  13.25695  05 16 43.117  +04 07 09.28  22.3G 12YG12    F51  C~3468      
2015 09  19.56590  05 33 00.480  +05 02 01.54  21.9G 12YG12    F51  C~3468      
2015 09  19.57884  05 33 00.476  +05 02 00.93  22.1G 12YG12    F51  C~3468      
2015 09  19.59176  05 33 00.514  +05 02 00.64  22.0G 12YG12    F51  C~3468      
2015 09  19.60473  05 33 00.504  +05 02 00.26  22.4G 12YG12    F51  C~3468      
2015 10  08.52917  05 32 52.651  +04 54 34.11  22.3G 12YG12    F51  C~3468      
2015 10  08.54213  05 32 52.632  +04 54 33.67  22.2G 12YG12    F51  C~3468      
2015 10  08.55507  05 32 52.605  +04 54 33.44  22.1G 12YG12    F51  C~3468      
2015 10  08.56803  05 32 52.575  +04 54 33.17  22.0G 12YG12    F51  C~3468      
2015 10  09.52408  05 32 51.104  +04 54 11.13  22.1G 12YG12    F51  C~3468      
2015 10  09.53702  05 32 51.098  +04 54 10.69  22.2G 12YG12    F51  C~3468      
2015 10  09.54995  05 32 51.059  +04 54 10.65  22.4G 12YG12    F51  C~3468      
2015 10  09.56290  05 32 51.037  +04 54 10.15  22.5G 12YG12    F51  C~3468      
2015 10  14.52807  05 32 41.668  +04 52 17.73  22.1G 12YG12    F51  C~3468      
2015 10  14.54102  05 32 41.643  +04 52 17.24  22.1G 12YG12    F51  C~3468      
2015 10  14.55408  05 32 41.606  +04 52 16.73  22.5G 12YG12    F51  C~3468      
2015 10  14.56714  05 32 41.578  +04 52 16.60  22.2G 12YG12    F51  C~3468      
2015 11  17.47525  05 30 32.838  +04 42 14.77  22.6G 12YG12    F51  C~3468      
2015 12  03.45932  05 29 03.955  +04 40 15.70  22.2G 12YG12    F51  C~3468      
2015 12  03.47201  05 29 03.877  +04 40 15.80  22.1G 12YG12    F51  C~3468      
2015 12  03.48479  05 29 03.798  +04 40 15.65  22.3G 12YG12    F51  C~3468      
2015 12  03.49746  05 29 03.716  +04 40 15.72  21.9G 12YG12    F51  C~3468      
2015 12  05.40771  05 28 52.463  +04 40 10.62  21.8G 12YG12    F51  C~3468      
2015 12  05.40835  05 28 52.458  +04 40 10.63  21.9G 12YG12    F51  C~3468      
2015 12  05.42012  05 28 52.383  +04 40 10.58  22.0G 12YG12    F51  C~3468      
2015 12  05.42076  05 28 52.382  +04 40 10.45  22.0G 12YG12    F51  C~3468      
2015 12  05.43254  05 28 52.309  +04 40 10.45  22.3G 12YG12    F51  C~3468      
2015 12  05.43320  05 28 52.306  +04 40 10.36  22.0G 12YG12    F51  C~3468      
2015 12  05.44506  05 28 52.245  +04 40 10.55  22.0G 12YG12    F51  C~3468      
2015 12  05.44571  05 28 52.231  +04 40 10.42  22.0G 12YG12    F51  C~3468      
2015 12  31.43695  05 26 17.317  +04 42 32.72  21.7G 12YG12    F51  C~3468      
2015 12  31.44739  05 26 17.279  +04 42 32.79  22.1G 12YG12    F51  C~3468      
2015 12  31.45777  05 26 17.215  +04 42 32.76  22.0G 12YG12    F51  C~3468      
2015 12  31.46842  05 26 17.117  +04 42 33.00  22.0G 12YG12    F51  C~3468      
2016 01  01.40674  05 26 11.806  +04 42 45.87  22.2G 12YG12    F51  C~3468      
2016 01  01.41738  05 26 11.767  +04 42 45.72  21.1G 12YG12    F51  C~3468      
2016 01  11.40360  05 25 17.242  +04 45 32.23  23.1G 12YG12    F51  C~3468      
2016 01  11.41545  05 25 17.187  +04 45 32.65  22.5G 12YG12    F51  C~3468      
2016 01  11.42731  05 25 17.123  +04 45 32.76  22.6G 12YG12    F51  C~3468      
2016 01  11.43912  05 25 17.065  +04 45 32.83  22.9G 12YG12    F51  C~3468      
2016 02  26.24602  05 22 50.525  +05 08 35.57  22.4G 12YG12    F51  C~3468      
2016 02  26.25879  05 22 50.525  +05 08 35.84  22.8G 12YG12    F51  C~3468      
2016 02  26.27147  05 22 50.519  +05 08 36.68  22.4G 12YG12    F51  C~3468      
2016 10  13.59143  05 39 17.871  +05 45 57.58  22.4G 12YG12    F51  C~3468      
2016 10  13.60359  05 39 17.851  +05 45 57.18  22.6G 12YG12    F51  C~3468      
2016 10  13.61573  05 39 17.823  +05 45 57.10  22.3G 12YG12    F51  C~3468      
2016 10  13.62788  05 39 17.794  +05 45 56.67  22.1G 12YG12    F51  C~3468      
2016 11  01.54811  05 38 21.401  +05 39 57.80  23.1G 12YG12    F51  C~3468      
2016 12  22.36619  05 33 45.539  +05 35 38.95  22.3G 12YG12    F51  C~3468      
2016 12  22.37908  05 33 45.452  +05 35 38.84  22.0G 12YG12    F51  C~3468      
2016 12  22.39195  05 33 45.370  +05 35 38.98  21.7G 12YG12    F51  C~3468      
2016 12  22.40490  05 33 45.294  +05 35 39.17  22.0G 12YG12    F51  C~3468      
2017 01  20.39755  05 31 06.123  +05 43 35.43  22.1G 12YG12    F51  C~3468      
2017 01  20.39819  05 31 06.121  +05 43 35.54  22.3G 12YG12    F51  C~3468      
2017 01  20.40935  05 31 06.073  +05 43 35.76  21.3G 12YG12    F51  C~3468      
2017 01  20.40999  05 31 06.042  +05 43 35.62  21.2G 12YG12    F51  C~3468      
2017 01  20.42114  05 31 06.019  +05 43 36.03  21.7G 12YG12    F51  C~3468      
2017 01  20.42178  05 31 06.006  +05 43 36.06  22.1G 12YG12    F51  C~3468      
2017 01  20.43292  05 31 05.967  +05 43 36.24  21.8G 12YG12    F51  C~3468      
2017 01  20.43356  05 31 05.962  +05 43 36.33  22.2G 12YG12    F51  C~3468      
2017 01  28.28421  05 30 32.047  +05 47 00.26  22.3G 12YG12    F51  C~3468      
2017 01  28.29695  05 30 31.992  +05 47 00.57  22.1G 12YG12    F51  C~3468      
2017 01  28.30966  05 30 31.931  +05 47 01.02  22.4G 12YG12    F51  C~3468      
2017 01  28.32237  05 30 31.881  +05 47 01.46  22.3G 12YG12    F51  C~3468      
2017 11  24.50690  05 43 17.916  +06 30 07.59  21.9G 12YG12    F51  C~3468      
2017 11  24.52000  05 43 17.789  +06 30 07.47  19.6G 12YG12    F51  C~3468      
2017 11  24.54622  05 43 17.718  +06 30 06.81  19.4G 12YG12    F51  C~3468      
2017 12  25.42432  05 40 13.599  +06 31 02.40  22.4G 12YG12    F51  C~3468      
2017 12  25.43642  05 40 13.519  +06 31 02.63  21.8G 12YG12    F51  C~3468      
2017 12  25.44857  05 40 13.442  +06 31 02.77  22.7G 12YG12    F51  C~3468      
2017 12  25.46079  05 40 13.374  +06 31 02.79  21.8G 12YG12    F51  C~3468      
2018 01  03.49088  05 39 19.772  +06 32 56.31  22.3G 12YG12    F51  C~3468      
2018 01  10.32633  05 38 41.223  +06 34 50.10  22.0G 12YG12    F51  C~3468      
2018 01  10.33898  05 38 41.172  +06 34 50.43  21.8G 12YG12    F51  C~3468      
2018 01  10.35166  05 38 41.106  +06 34 50.56  22.2G 12YG12    F51  C~3468      
2018 01  10.36439  05 38 41.030  +06 34 50.77  22.0G 12YG12    F51  C~3468      

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    -0.31       0.00    -0.03
  2   0.0791      0.00     0.13       0.00     0.17
  3   0.0929      0.00     0.20       0.00     0.43
  4   0.1420      0.00     0.02       0.00    -0.79
  5   0.1420      0.00    -0.29       0.00    -0.25
  6   0.9802      0.00    -0.04       0.00     0.07
  7   0.9802      0.00     0.48       0.00     0.22
  8   1.0567      0.00     0.21       0.00     0.08
  9   1.0567      0.00    -0.09       0.00     0.16
 10   1.0568      0.00    -0.22       0.00     0.28
 11   1.0568      0.00     0.09       0.00     0.09
 12   1.0892      0.00     0.07       0.00     0.23
 13   1.0892      0.00     0.14       0.00    -0.04
 14   1.0892      0.00     0.06       0.00    -0.27
 15   1.0893      0.00     0.79       0.00    -0.28
 16   1.1386      0.00    -0.28       0.00    -0.38
 17   1.2970      0.00    -0.02       0.00    -0.05
 18   1.3051      0.00    -0.13       0.00    -0.06
 19   1.3051      0.00    -0.04       0.00     0.07
 20   1.3051      0.00    -0.01       0.00     0.26
 21   1.3052      0.00    -0.10       0.00     0.08
 22   2.0313      0.00    -0.06       0.00    -0.02
 23   2.0314      0.00     0.01       0.00     0.11
 24   2.0314      0.00     0.07       0.00    -0.18
 25   2.0314      0.00    -0.08       0.00    -0.19
 26   2.0640      0.00    -0.21       0.00     0.03
 27   2.1843      0.00     0.03       0.00     0.11
 28   2.1843      0.00    -0.24       0.00     0.20
 29   2.1843      0.00    -0.02       0.00     0.02
 30   2.1844      0.00    -0.05       0.00     0.05
 31   2.1897      0.00     0.01       0.00     0.00
 32   2.1897      0.00    -0.04       0.00    -0.05
 33   2.1898      0.00     0.06       0.00    -0.01
 34   2.1898      0.00    -0.06       0.00     0.03
 35   2.2633      0.00    -0.15       0.00     0.06
 36   2.8610      0.00     0.17       0.00     0.33
 37   2.8611      0.00    -0.01       0.00     0.03
 38   2.8611      0.00     0.45       0.00     0.04
 39   2.8611      0.00     0.18       0.00    -0.04
 40   2.9130      0.00    -0.11       0.00    -0.04
 41   2.9130      0.00    -0.08       0.00    -0.18
 42   2.9130      0.00    -0.18       0.00    -0.11
 43   2.9131      0.00    -0.32       0.00    -0.08
 44   2.9157      0.00    -0.14       0.00    -0.01
 45   2.9157      0.00     0.10       0.00    -0.16
 46   2.9157      0.00    -0.15       0.00     0.10
 47   2.9158      0.00    -0.15       0.00    -0.10
 48   2.9294      0.00     0.02       0.00     0.38
 49   2.9294      0.00     0.08       0.00     0.18
 50   2.9294      0.00    -0.03       0.00    -0.04
 51   2.9295      0.00    -0.01       0.00     0.12
 52   3.0223      0.00    -0.33       0.00     0.00
 53   3.0661      0.00    -0.03       0.00    -0.05
 54   3.0661      0.00    -0.06       0.00     0.09
 55   3.0661      0.00    -0.10       0.00    -0.02
 56   3.0662      0.00    -0.20       0.00     0.10
 57   3.0714      0.00    -0.01       0.00     0.12
 58   3.0714      0.00    -0.02       0.00     0.13
 59   3.0714      0.00    -0.09       0.00     0.11
 60   3.0714      0.00    -0.04       0.00    -0.02
 61   3.0715      0.00    -0.07       0.00     0.00
 62   3.0715      0.00    -0.06       0.00    -0.08
 63   3.0715      0.00     0.10       0.00     0.13
 64   3.0715      0.00    -0.05       0.00     0.00
 65   3.1427      0.00    -0.24       0.00    -0.04
 66   3.1427      0.00     0.10       0.00    -0.11
 67   3.1427      0.00     0.04       0.00    -0.28
 68   3.1428      0.00    -0.50       0.00    -0.18
 69   3.1453      0.00     0.12       0.00     0.05
 70   3.1454      0.00     0.46       0.00    -0.25
 71   3.1727      0.00     0.04       0.00    -0.07
 72   3.1727      0.00     0.15       0.00     0.12
 73   3.1728      0.00     0.13       0.00    -0.00
 74   3.1728      0.00     0.20       0.00    -0.16
 75   3.2982      0.00    -0.16       0.00     0.12
 76   3.2982      0.00     0.01       0.00    -0.10
 77   3.2983      0.00     0.09       0.00     0.26
 78   3.9289      0.00    -0.04       0.00     0.10
 79   3.9289      0.00     0.04       0.00    -0.05
 80   3.9289      0.00     0.00       0.00     0.13
 81   3.9290      0.00    -0.05       0.00    -0.05
 82   3.9808      0.00     0.09       0.00     0.12
 83   4.1199      0.00     0.07       0.00     0.20
 84   4.1199      0.00    -0.04       0.00    -0.02
 85   4.1200      0.00    -0.09       0.00     0.02
 86   4.1200      0.00    -0.04       0.00     0.10
 87   4.1994      0.00     0.02       0.00    -0.10
 88   4.1994      0.00     0.03       0.00    -0.00
 89   4.1994      0.00     0.11       0.00    -0.05
 90   4.1994      0.00    -0.31       0.00    -0.20
 91   4.1994      0.00     0.14       0.00    -0.06
 92   4.1994      0.00    -0.01       0.00    -0.05
 93   4.1995      0.00     0.19       0.00    -0.14
 94   4.1995      0.00     0.16       0.00    -0.06
 95   4.2210      0.00     0.13       0.00    -0.08
 96   4.2210      0.00     0.08       0.00    -0.12
 97   4.2210      0.00    -0.05       0.00    -0.02
 98   4.2211      0.00    -0.03       0.00     0.06
 99   5.0429      0.00     0.06       0.00     0.03
100   5.0430      0.00    -0.75       0.00    -0.01
101   5.0430      0.00     0.39       0.00    -0.51
102   5.1276      0.00     0.10       0.00     0.01
103   5.1276      0.00     0.01       0.00     0.12
104   5.1277      0.00    -0.02       0.00     0.13
105   5.1277      0.00     0.09       0.00     0.03
106   5.1524      0.00     0.25       0.00     0.51
107   5.1711      0.00    -0.19       0.00    -0.07
108   5.1712      0.00     0.10       0.00     0.03
109   5.1712      0.00     0.17       0.00    -0.08
110   5.1712      0.00     0.09       0.00    -0.10

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.

12YG12    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.736    39.735    39.736
ecceobj         0.214     0.214     0.214
incobj         30.905    30.905    30.905
qmin           24.480    24.485    24.475
qmax           55.090    55.092    55.087
amean          39.454    39.454    39.454
amin           39.102    39.103    39.102
amax           39.941    39.940    39.940
emean           0.269     0.269     0.269
emin            0.139     0.139     0.140
emax            0.379     0.379     0.379
imean          27.539    27.539    27.539
imin           23.610    23.613    23.606
imax           30.648    30.648    30.648
excite_mean     0.539     0.539     0.539
fracstop        1.000     1.000     1.000
cjmean          2.714     2.714     2.714

libcent 0       179.9     179.9     179.9
libamp  0        33.9      33.8      34.0
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       243.5     243.6     243.4
kozaiamp        180.0     180.0     180.0