Orbit Fit and Astrometric record for 19GP187

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: 19GP187   
# Created Tue Apr  1 01:11:14 2025
# Orbit generated from Bernstein formalism
# Fitting     14 observations of     14
# Arc:   1.77y
# First observation: 2018/04/22
#  Last observation: 2020/01/30
Preliminary a, adot, b, bdot, g, gdot:
   0.000160   0.022402   0.000000  -0.000293   0.023203   0.000000
# Chi-squared of fit:     3.05 DOF:     22 RMS:  0.08
# Min/Max residuals:    -0.19    0.13
# Exact a, adot, b, bdot, g, gdot:
  1.510973E-05  2.242023E-02 -4.006661E-07 -2.934730E-04  2.344751E-02 -4.476472E-04
# Covariance matrix:
  1.4661E-12 -2.0128E-12 -7.2117E-15  1.5892E-14 -6.0589E-13 -2.3284E-11
 -2.0128E-12  3.4835E-12  1.9296E-14 -3.4968E-14  6.8302E-13  4.5373E-11
 -7.2117E-15  1.9296E-14  8.7646E-13 -8.4137E-13 -3.4096E-15  2.6639E-13
  1.5892E-14 -3.4968E-14 -8.4137E-13  9.1725E-13 -8.9251E-15 -6.1482E-13
 -6.0589E-13  6.8302E-13 -3.4096E-15 -8.9251E-15  1.7554E-12  2.5833E-11
 -2.3284E-11  4.5373E-11  2.6639E-13 -6.1482E-13  2.5833E-11  9.2239E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.162540 -177.604143   -0.489047    0.063439   -0.870832  2458230.873652
# Heliocentric elements and errors
Epoch:              2458230.5000  =  2018/04/22
Mean Anomaly:          318.64520 +/-     3.391
Argument of Peri:      143.55902 +/-     3.544
Long of Asc Node:       82.07648 +/-     0.033
Inclination:             4.15445 +/-     0.001
Eccentricity:         0.01637812 +/-    0.0009
Semi-Major Axis:     44.05997366 +/-    0.0112
Time of Perihelion: 2470501.7333 +/-    1006.2
Perihelion:          43.33835415 +/-    0.0430
Aphelion:            44.78159317 +/-    0.0431
Period (y)              292.4654 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -43.35178307 +/-    0.0024
Ecliptic Y           -2.31055682 +/-    0.0001
Ecliptic Z            3.09571186 +/-    0.0002
Ecliptic XDOT         0.00016565 +/-    0.0000
Ecliptic YDOT        -0.00261778 +/-    0.0000
Ecliptic ZDOT        -0.00003813 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.52354765 +/-    0.0024
Geocenter to KBO     42.64845092 +/-    0.0024
# Hcoef:  9.54

The following table shows the complete astrometric record for 19GP187. 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 (19GP187) followed by the observatory code and reference code for the source of the astrometry.

2018 04  22.372851 12 15 24.90   +02 52 00.0         19GP187   T09  C~89Vi      
2019 02  05.544578 12 25 00.80   +01 47 22.4         19GP187   T09  C~89Vi      
2019 03  03.574069 12 23 36.12   +01 58 05.5         19GP187   T09  C~89Vi      
2019 03  03.614338 12 23 35.96   +01 58 06.7         19GP187   T09  C~89Vi      
2019 04  04.44382  12 21 21.19   +02 12 58.5   25.9g 19GP187   T09  C~89Vi      
2019 04  04.46353  12 21 21.10   +02 12 59.0   26.3g 19GP187   T09  C~89Vi      
2019 04  04.48669  12 21 20.99   +02 12 59.6   26.3g 19GP187   T09  C~89Vi      
2019 04  04.50558  12 21 20.92   +02 13 00.0   26.0g 19GP187   T09  C~89Vi      
2019 04  04.51607  12 21 20.87   +02 13 00.3   26.1g 19GP187   T09  C~89Vi      
2019 04  05.52660  12 21 16.54   +02 13 27.0   25.5r 19GP187   T09  C~89Vi      
2019 04  05.54963  12 21 16.44   +02 13 27.7   26.4r 19GP187   T09  C~89Vi      
2019 04  05.57896  12 21 16.30   +02 13 28.7   26.4r 19GP187   T09  C~89Vi      
2019 04  06.343824 12 21 13.06   +02 13 48.5         19GP187   T09  C~89Vi      
2020 01  30.649938 12 29 53.82   +01 13 51.6         19GP187   T09  C~89Vi      

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     0.00       0.00     0.04
     2   0.7917   9468.20     0.12    -114.18     0.05
     3   0.8630   8044.92    -0.08     -31.56    -0.05
     4   0.8631   8042.23    -0.11     -31.42     0.03
     5   0.9502   5831.46     0.02     -20.08     0.07
     6   0.9503   5830.02    -0.03     -20.16     0.03
     7   0.9503   5828.27    -0.14     -20.27    -0.04
     8   0.9504   5827.15     0.07     -20.32    -0.06
     9   0.9504   5826.34     0.01     -20.35    -0.06
    10   0.9532   5756.12     0.12     -21.76    -0.10
    11   0.9533   5754.47     0.08     -21.72    -0.01
    12   0.9533   5752.14    -0.19     -21.64     0.12
    13   0.9554   5699.67     0.13     -22.86    -0.09
    14   1.7749  14315.72     0.00    -201.12     0.06

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.

19GP187    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.710    43.742    43.677
ecceobj         0.008     0.008     0.008
incobj          4.155     4.154     4.155
qmin           42.819    42.813    42.785
qmax           45.115    45.199    45.066
amean          43.901    43.934    43.869
amin           43.566    43.596    43.533
amax           44.240    44.272    44.206
emean           0.009     0.009     0.009
emin            0.000     0.000     0.000
emax            0.020     0.021     0.020
imean           2.444     2.445     2.442
imin            1.782     1.793     1.770
imax            3.021     3.018     3.023
excite_mean     0.044     0.044     0.044
fracstop        1.000     1.000     1.000
cjmean          3.098     3.098     3.098

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       182.2     181.8     182.3
kozaiamp        180.0     179.9     180.0