Orbit Fit and Astrometric record for 15RN281

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: 15RN281   
# Created Thu Apr 18 01:10:36 2019
# Orbit generated from Bernstein formalism
# Fitting   32 observations of   33
# Arc:   2.44y
# First observation: 2015/07/14
#  Last observation: 2017/12/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000075   0.014360   0.000009  -0.012162   0.021547   0.000000
# Chi-squared of fit:     9.05 DOF:   58 RMS:  0.09
# Min/Max residuals:    -0.25    0.25
# Exact a, adot, b, bdot, g, gdot:
  9.639086E-06  1.414512E-02 -8.874154E-06 -1.197945E-02  2.137760E-02 -1.091544E-03
# Covariance matrix:
  1.7693E-13  1.5482E-14  1.3965E-14 -8.3397E-14  1.8032E-13  3.3341E-12
  1.5482E-14  1.7992E-13  2.9587E-14 -1.5261E-13  2.0964E-13  6.0714E-12
  1.3965E-14  2.9587E-14  1.1019E-13 -1.1728E-13  4.8314E-14  2.1475E-12
 -8.3397E-14 -1.5261E-13 -1.1728E-13  3.3611E-13 -2.6361E-13 -1.0420E-11
  1.8032E-13  2.0964E-13  4.8314E-14 -2.6361E-13  4.4539E-13  1.0508E-11
  3.3341E-12  6.0714E-12  2.1475E-12 -1.0420E-11  1.0508E-11  4.1358E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.417604   12.783361    1.005053    0.009586   -0.158832  2457218.059109
# Heliocentric elements and errors
Epoch:              2457210.5000  =  2015/07/07
Mean Anomaly:          219.99847 +/-     0.367
Argument of Peri:      323.23789 +/-     0.362
Long of Asc Node:      195.55810 +/-     0.000
Inclination:            40.44496 +/-     0.001
Eccentricity:         0.13053017 +/-    0.0005
Semi-Major Axis:     42.44309092 +/-    0.0066
Time of Perihelion: 2496487.5818 +/-     102.6
Perihelion:          36.90298697 +/-    0.0232
Aphelion:            47.98319487 +/-    0.0237
Period (y)              276.5150 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           45.91138548 +/-    0.0014
Ecliptic Y            9.38715624 +/-    0.0003
Ecliptic Z            2.78821493 +/-    0.0001
Ecliptic XDOT        -0.00045002 +/-    0.0000
Ecliptic YDOT         0.00174975 +/-    0.0000
Ecliptic ZDOT        -0.00153976 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.94409613 +/-    0.0014
Geocenter to KBO     46.77794643 +/-    0.0015
# Hcoef:  8.38

The following table shows the complete astrometric record for 15RN281. 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 (15RN281) followed by the observatory code and reference code for the source of the astrometry.

2015 07  14.55832  00 41 39.639  +08 11 43.90  24.8r 15RN281   568  C~2nvu      
2015 07  19.53712  00 41 37.871  +08 11 19.69  25.0r 15RN281   568  C~2nvu      
2015 08  13.50040  00 41 01.516  +08 06 13.21  24.4r 15RN281   568  C~2nvu      
2015 08  13.55382  00 41 01.397  +08 06 12.08  25.1r 15RN281   568  C~2nvu      
2015 08  20.43842  00 40 43.990  +08 03 55.99  25.3r 15RN281   568  C~2nvu      
2015 08  20.48764  00 40 43.865  +08 03 54.92  24.9r 15RN281   568  C~2nvu      
2015 09  07.58494  00 39 46.116  +07 56 25.86  25.1w 15RN281   568  C~2nvu      
2015 09  09.41265  00 39 39.506  +07 55 34.18  25.1r 15RN281   568  C~2nvu      
2015 09  09.45371  00 39 39.363  +07 55 33.06  24.9r 15RN281   568  C~2nvu      
2015 09  09.49464  00 39 39.206  +07 55 31.86  25.1r 15RN281   568  C~2nvu      
2015 09  10.51893  00 39 35.433  +07 55 02.35  25.2w 15RN281   568  C~2nvu      
2015 09  18.48318  00 39 05.060  +07 51 03.57  24.9w 15RN281   568  C~2nvu      
2015 10  08.37093  00 37 44.598  +07 40 14.22  24.8w 15RN281   568  C~2nvu      
2015 10  08.42353  00 37 44.375  +07 40 12.38  25.0w 15RN281   568  C~2nvu      
2015 10  09.34050  00 37 40.634  +07 39 41.45  24.8w 15RN281   568  C~2nvu      
2015 11  10.46703  00 35 41.979  +07 22 12.01  25.3w 15RN281   568  C~2nvu      
2016 01  02.27875  00 34 35.063  +07 05 03.32  25.6w 15RN281   568  C~2nvu      
2016 09  05.48236  00 44 00.168  +07 37 49.13  24.6w 15RN281   568  C~2nvu      
2016 09  06.43656  00 43 56.814  +07 37 22.66  25.5w 15RN281   568  C~2nvu      
2016 09  06.47701  00 43 56.653  +07 37 21.45  25.2w 15RN281   568  C~2nvu      
2016 09  06.52410  00 43 56.484  +07 37 20.41  25.1w 15RN281   568  C~2nvu      
2016 09  06.56619  00 43 56.348  +07 37 19.09  25.5w 15RN281   568  C~2nvu      
2016 09  26.43941  00 42 39.974  +07 27 11.21  24.8w 15RN281   568  C~2nvu      
2016 09  27.47990  00 42 35.747  +07 26 37.28  24.9w 15RN281   568  C~2nvu      
2016 11  04.28877  00 40 08.049  +07 05 49.03  25.1w 15RN281   568  C~2nvu      
2016 11  04.34801  00 40 07.841  +07 05 47.29  24.9w 15RN281   568  C~2nvu      
2016 12  29.27436  00 38 37.091  +06 46 38.70  25.5w 15RN281   568  C~2nvu      
2017 01  03.24627  00 38 40.331  +06 46 05.39  24.5w 15RN281   568  C~2nvu      
2017 09  15.43089  00 47 34.355  +07 13 39.54  25.8w 15RN281   568  C~2nvu      
2017 09  16.51398  00 47 30.210  +07 13 06.30  25.5w 15RN281   568  C~2nvu      
2017 09  22.46739  00 47 06.915  +07 09 59.50  25.2w 15RN281   568  C~2nvu      
2017 09  22.49605  00 47 06.802  +07 09 58.54  25.9w 15RN281   568  C~2nvu      
2017 12  23.28322  00 42 41.180  +06 28 35.32  25.3w 15RN281   568  C~2nvu      

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     0.17       0.00     0.00
  2   0.0136    -33.64     0.19     -11.99    -0.01
  3   0.0820   -650.41    -0.10     -82.25     0.05
  4   0.0821   -652.48    -0.05     -82.60    -0.15
  5   0.1010   -943.66    -0.25    -106.35     0.09
  6   0.1011   -945.78    -0.09    -106.60    -0.01
  7   0.1507  -1911.07    -0.06    -182.72     0.01
  8   0.1557  -2021.69    -0.02    -191.64     0.03
  9   0.1558  -2024.08     0.13    -191.84     0.02
 10   0.1559  -2026.70     0.07    -192.02     0.01
 11   0.1587  -2089.85    -0.01    -197.13    -0.02
 12   0.1805  -2598.74     0.05    -239.22    -0.01
 13   0.2349  -3954.04     0.11    -365.30    -0.02
 14   0.2351  -3957.81     0.02    -365.69    -0.05
 15   0.2376  -4021.14    -0.07    -372.20     0.02
 16   0.3256  -6057.85 (   0.59)   -640.24 (  -0.09)
 17   0.4701  -7380.69     0.04   -1191.74     0.04
 18   1.1470   1125.35    -0.04   -2689.64    -0.10
 19   1.1496   1069.10     0.05   -2694.52    -0.01
 20   1.1497   1066.42    -0.18   -2694.70    -0.00
 21   1.1498   1063.70    -0.05   -2694.68     0.25
 22   1.1499   1061.33     0.12   -2695.10     0.03
 23   1.2043   -221.78     0.04   -2810.51    -0.03
 24   1.2072   -292.92     0.09   -2817.13     0.02
 25   1.3107  -2804.47    -0.07   -3103.99    -0.17
 26   1.3109  -2808.00    -0.07   -3104.37    -0.07
 27   1.4612  -4502.87    -0.00   -3629.73    -0.02
 28   1.4748  -4471.60    -0.14   -3679.36     0.11
 29   2.1735   3495.56     0.07   -5267.51     0.14
 30   2.1765   3425.77     0.04   -5274.14     0.04
 31   2.1928   3033.52    -0.10   -5311.37    -0.09
 32   2.1928   3031.59    -0.07   -5311.60    -0.15
 33   2.4441  -1581.84     0.19   -6054.63     0.07

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.

15RN281    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        42.727    42.744    42.711
ecceobj         0.124     0.125     0.122
incobj         40.233    40.234    40.232
qmin           35.967    35.931    35.974
qmax           49.448    49.525    49.430
amean          42.565    42.581    42.545
amin           42.234    42.243    42.204
amax           42.946    42.973    42.915
emean           0.130     0.132     0.129
emin            0.108     0.111     0.106
emax            0.152     0.153     0.152
imean          40.393    40.394    40.394
imin           40.054    40.071    40.037
imax           40.753    40.745    40.756
excite_mean     0.661     0.661     0.661
fracstop        1.000     1.000     1.000
cjmean          2.502     2.502     2.503

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       159.7     159.7     159.9
kozaiamp        180.0     180.0     180.0