Orbit Fit and Astrometric record for 01KG77

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: 01KG77    
# Created Thu Mar 28 01:10:31 2024
# Orbit generated from Bernstein formalism
# Fitting     15 observations of     15
# Arc:   1.94y
# First observation: 2001/05/23
#  Last observation: 2003/05/01
Preliminary a, adot, b, bdot, g, gdot:
  -0.000095   0.036125  -0.000045   0.009878   0.029424   0.000000
# Chi-squared of fit:    34.35 DOF:     24 RMS:  0.27
# Min/Max residuals:    -0.45    0.53
# Exact a, adot, b, bdot, g, gdot:
  2.101876E-05  3.592817E-02  4.729072E-06  9.822706E-03  2.949374E-02 -4.934479E-03
# Covariance matrix:
  2.8452E-13 -2.8837E-13  3.9358E-15 -2.3622E-14  6.7835E-14 -1.3447E-12
 -2.8837E-13  1.0656E-12 -4.7771E-14  2.3571E-13  3.2226E-13  1.3375E-11
  3.9358E-15 -4.7771E-14  2.4103E-13 -1.9531E-13 -2.6007E-14 -7.9541E-13
 -2.3622E-14  2.3571E-13 -1.9531E-13  3.0359E-13  1.1422E-13  3.8757E-12
  6.7835E-14  3.2226E-13 -2.6007E-14  1.1422E-13  4.9228E-13  6.4667E-12
 -1.3447E-12  1.3375E-11 -7.9541E-13  3.8757E-12  6.4667E-12  2.1987E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.443252 -118.120510   -0.003540   -0.043564   -1.017990  2452052.691053
# Heliocentric elements and errors
Epoch:              2452050.5000  =  2001/05/21
Mean Anomaly:          351.36011 +/-     0.022
Argument of Peri:       15.69762 +/-     0.067
Long of Asc Node:      250.46661 +/-     0.000
Inclination:            15.51962 +/-     0.001
Eccentricity:         0.44451845 +/-    0.0002
Semi-Major Axis:     61.10409205 +/-    0.0195
Time of Perihelion: 2456237.5649 +/-      10.5
Perihelion:          33.94219552 +/-    0.0184
Aphelion:            88.26598858 +/-    0.0318
Period (y)              477.6542 +/-      0.23
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -16.43911665 +/-    0.0004
Ecliptic Y          -30.77134742 +/-    0.0007
Ecliptic Z           -1.44522771 +/-    0.0000
Ecliptic XDOT         0.00313043 +/-    0.0000
Ecliptic YDOT        -0.00120032 +/-    0.0000
Ecliptic ZDOT         0.00093072 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.91717430 +/-    0.0007
Geocenter to KBO     33.90550082 +/-    0.0008
# Hcoef:  8.06

The following table shows the complete astrometric record for 01KG77. 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 (01KG77) followed by the observatory code and reference code for the source of the astrometry.

2001 05  23.19031  15 56 59.83   -22 55 50.2   23.0R 01KG77    807  Cd1817      
2001 05  23.25457  15 56 59.46   -22 55 48.8         01KG77    807  Cd1817      
2001 06  13.06604  15 55 02.40   -22 47 55.8   23.3R 01KG77    304  Cd1817      
2001 06  13.19097  15 55 01.72   -22 47 53.2         01KG77    304  Cd1817      
2001 07  24.30788  15 52 24.59   -22 34 25.4         01KG77    568  Cd4418      
2001 07  25.27436  15 52 22.75   -22 34 11.1         01KG77    568  Cd4418      
2002 04  06.28355  16 10 09.54   -23 00 19.8   22.3R 01KG77    807  Cf4617      
2002 04  07.28868  16 10 06.14   -23 00 08.7         01KG77    807  Cf4617      
2002 04  07.38484  16 10 05.83   -23 00 07.5         01KG77    807  Cf4617      
2002 07  10.97191  16 02 09.69   -22 30 04.7   23.0R 01KG77    304  Cf9823      
2002 07  11.10104  16 02 09.21   -22 30 02.4         01KG77    304  Cf9823      
2002 07  13.06484  16 02 02.48   -22 29 27.9         01KG77    304  Cf9823      
2002 07  13.09932  16 02 02.35   -22 29 27.3         01KG77    304  Cf9823      
2003 05  01.52812  16 17 39.47   -22 42 36.0   24.1R 01KG77    568  Ch9866      
2003 05  01.57370  16 17 39.23   -22 42 35.2         01KG77    568  Ch9866      

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    -0.36       0.00     0.11
     2   0.0002     -5.29    -0.22       0.33     0.10
     3   0.0572  -1685.89     0.26     131.27     0.26
     4   0.0575  -1695.63     0.22     131.87     0.02
     5   0.1701  -3991.49     0.11     467.41     0.31
     6   0.1727  -4019.43    -0.23     476.01     0.16
     7   0.8709  10764.11     0.03    1837.63     0.20
     8   0.8736  10715.80    -0.04    1840.01    -0.45
     9   0.8739  10711.36     0.34    1840.41    -0.32
    10   1.1329   3893.96     0.11    2369.32    -0.37
    11   1.1332   3886.98    -0.04    2370.27    -0.38
    12   1.1386   3788.74     0.09    2385.90    -0.34
    13   1.1387   3786.85    -0.06    2386.14    -0.37
    14   1.9393  16728.50    -0.09    3983.71     0.51
    15   1.9394  16725.07    -0.12    3983.94     0.53

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.

01KG77    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        61.175    61.233    61.117
ecceobj         0.446     0.446     0.445
incobj         15.513    15.513    15.513
qmin           32.203    32.050    31.980
qmax           93.507    93.296    92.504
amean          61.488    61.377    61.117
amin           59.881    58.869    59.197
amax           63.106    63.034    62.694
emean           0.456     0.457     0.455
emin            0.430     0.422     0.427
emax            0.482     0.482     0.478
imean          15.809    15.592    15.542
imin           14.253    13.956    13.614
imax           17.171    16.834    16.819
excite_mean     0.531     0.531     0.528
fracstop        1.000     1.000     1.000
cjmean          2.937     2.936     2.937

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       162.0     164.6     177.4
kozaiamp        180.0     180.0     180.0