Orbit Fit and Astrometric record for 21RV236

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: 21RV236   
# Created Tue Apr  1 01:11:26 2025
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:   2.02y
# First observation: 2019/09/29
#  Last observation: 2021/10/04
Preliminary a, adot, b, bdot, g, gdot:
   0.000003   0.029574  -0.000000   0.000146   0.026540   0.000000
# Chi-squared of fit:     4.97 DOF:     14 RMS:  0.12
# Min/Max residuals:    -0.23    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.804240E-05  2.968555E-02  4.056587E-08  1.460948E-04  2.643160E-02  2.027990E-03
# Covariance matrix:
  7.3175E-13 -1.2280E-12  6.5619E-16 -4.4100E-15 -6.5781E-13 -1.4561E-11
 -1.2280E-12  1.1100E-11 -7.0444E-15  5.5311E-14  1.2679E-11  1.8233E-10
  6.5619E-16 -7.0444E-15  6.1374E-13 -3.3215E-13 -7.5611E-15 -1.1743E-13
 -4.4100E-15  5.5311E-14 -3.3215E-13  2.3700E-13  6.5895E-14  9.3004E-13
 -6.5781E-13  1.2679E-11 -7.5611E-15  6.5895E-14  1.8210E-11  2.1702E-10
 -1.4561E-11  1.8233E-10 -1.1743E-13  9.3004E-13  2.1702E-10  3.0657E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.258125   -8.857642   -0.252243    0.004373   -0.967411  2458755.514497
# Heliocentric elements and errors
Epoch:              2458750.5000  =  2019/09/24
Mean Anomaly:           12.46615 +/-     0.271
Argument of Peri:       20.64147 +/-     0.506
Long of Asc Node:      309.12800 +/-     0.102
Inclination:             0.37334 +/-     0.001
Eccentricity:         0.25899988 +/-    0.0006
Semi-Major Axis:     51.60351182 +/-    0.0208
Time of Perihelion: 2454061.8558 +/-     101.9
Perihelion:          38.23820850 +/-    0.0352
Aphelion:            64.96881513 +/-    0.0411
Period (y)              370.7038 +/-      0.22
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           38.37975942 +/-    0.0060
Ecliptic Y           -5.73217564 +/-    0.0009
Ecliptic Z            0.17042943 +/-    0.0000
Ecliptic XDOT         0.00068946 +/-    0.0000
Ecliptic YDOT         0.00300682 +/-    0.0000
Ecliptic ZDOT         0.00001585 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.80583483 +/-    0.0060
Geocenter to KBO     37.83350751 +/-    0.0061
# Hcoef:  9.14

The following table shows the complete astrometric record for 21RV236. 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 (21RV236) followed by the observatory code and reference code for the source of the astrometry.

2019 09  29.013696 23 27 02.699  -03 16 27.38  25.0r 21RV236   W84  C~7XPn      
2019 09  29.177510 23 27 01.954  -03 16 32.09  25.0r 21RV236   W84  C~7XPn      
2020 10  21.004397 23 31 43.023  -02 45 56.79  25.0r 21RV236   W84  C~7XPn      
2020 10  21.174149 23 31 42.385  -02 46 01.03  25.0r 21RV236   W84  C~7XPn      
2021 09  06.108763 23 41 13.914  -01 43 59.20  24.7r 21RV236   W84  C~7XPn      
2021 09  06.196686 23 41 13.495  -01 44 01.80  24.7r 21RV236   W84  C~7XPn      
2021 10  01.020278 23 39 18.632  -01 56 23.08  25.0r 21RV236   W84  C~7XPn      
2021 10  01.164836 23 39 18.005  -01 56 27.66  25.0r 21RV236   W84  C~7XPn      
2021 10  04.002582 23 39 05.304  -01 57 49.86  25.0r 21RV236   W84  C~7XPn      
2021 10  04.175328 23 39 04.521  -01 57 54.71  25.0r 21RV236   W84  C~7XPn      

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    -0.06       0.00     0.01
     2   0.0004    -12.11     0.06       0.06     0.01
     3   1.0623   4581.36     0.15      27.20     0.07
     4   1.0627   4570.90    -0.15      27.07    -0.10
     5   1.9387  13931.03     0.08      57.91    -0.02
     6   1.9389  13924.20    -0.08      58.01     0.03
     7   2.0069  12041.93    -0.20      59.33     0.31
     8   2.0073  12031.45     0.16      58.85    -0.23
     9   2.0150  11823.37     0.02      58.74    -0.10
    10   2.0155  11810.63     0.01      58.93     0.03

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.

21RV236    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        51.607    51.680    51.534
ecceobj         0.259     0.261     0.257
incobj          0.379     0.379     0.379
qmin           37.655    37.586    37.690
qmax           65.811    66.114    65.679
amean          51.365    51.479    51.337
amin           50.859    50.965    50.848
amax           52.013    52.113    51.936
emean           0.253     0.256     0.252
emin            0.242     0.244     0.241
emax            0.266     0.269     0.265
imean           2.006     1.985     2.008
imin            1.651     1.643     1.658
imax            2.357     2.385     2.360
excite_mean     0.256     0.258     0.255
fracstop        1.000     1.000     1.000
cjmean          3.111     3.111     3.112

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       180.1     187.1     179.9
kozaiamp        179.9     179.9     180.0