7月11日UT、Gary Hug (Sandlot天文台, Scranton, KS)は、0.56-m反射望遠鏡により
核光度19.2-20.2等のP/2003 S1を検出した。

検出位置は次のとおり、

     2013 UT             R.A. (2000) Decl.       Mag.   Observer
     July 11.39104    2 07 30.36   +17 15 43.8   20.2   Hug
          11.39947    2 07 30.96   +17 15 46.8   19.3    "
          11.40788    2 07 31.65   +17 15 50.6   19.2    "
          12.36823    2 08 45.73   +17 22 11.9   20.0    "
          12.38204    2 08 46.83   +17 22 17.2   19.7    "
          12.38997    2 08 47.47   +17 22 21.0   20.0    "

MPEC 2013-A29のG. V. Williamsの予報に対し、Delta(T)は、-0.67 dayであった。

連結軌道要素、位置推算表は次のとおり、

Orbital elements:
    P/2003 S1 (NEAT)
Epoch 2004 Mar. 16.0 TT = JDT 2453080.5
T 2004 Mar. 27.62879 TT                                 MPC
q   2.5956093            (2000.0)            P               Q
n   0.10132910     Peri.  175.81978     +0.54595512     -0.83289610
a   4.5566595      Node   241.06680     +0.76564525     +0.53992845
e   0.4303701      Incl.    5.94513     +0.34017696     +0.12149630
P   9.73
From 308 observations 2003 July 29-2013 July 12, mean residual 0".6.

    P/2003 S1 (NEAT)
Epoch 2013 Dec. 14.0 TT = JDT 2456640.5
T 2013 Dec. 15.45417 TT                                 MPC
q   2.5909234            (2000.0)            P               Q
n   0.10151482     Peri.  176.07160     +0.54264892     -0.83503740
a   4.5511003      Node   241.04218     +0.76779224     +0.53695701
e   0.4307040      Incl.    5.95657     +0.34062769     +0.11995712
P   9.71
From 308 observations 2003 July 29-2013 July 12, mean residual 0".6.

    P/2003 S1 (NEAT)
Epoch 2023 May 16.0 TT = JDT 2460080.5
T 2023 May 4.19889 TT                                   MPC
q   2.5650734            (2000.0)            P               Q
n   0.10194757     Peri.  173.53171     +0.62612846     -0.77417324
a   4.5382122      Node   237.66086     +0.71036501     +0.61546749
e   0.4347833      Incl.    6.30847     +0.32147272     +0.14783628
P   9.67
From 308 observations 2003 July 29-2013 July 12, mean residual 0".6.

    P/2003 S1 (NEAT)
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5
T 2013 Dec. 15.41479 TT                                 MPC
q   2.5910636            (2000.0)            P               Q
n   0.10156801     Peri.  176.05781     +0.54285136     -0.83490543
a   4.5495113      Node   241.04208     +0.76766199     +0.53714461
e   0.4304743      Incl.    5.95681     +0.34059869     +0.12003583
P   9.70
From 308 observations 2003 July 29-2013 July 12, mean residual 0".6.

Ephemeris:
    P/2003 S1 (NEAT)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1
2013 06 13    01 29 01.9 +13 44 41   3.3211  2.8859    56.4    17.0  20.2
...
2013 06 28    01 49 45.3 +15 41 25   3.1145  2.8438    65.3    19.0  20.0
...
2013 07 06    02 00 28.0 +16 39 02   3.0004  2.8223    70.2    19.8  19.9
...
2013 07 12    02 08 17.2 +17 19 47   2.9136  2.8067    73.9    20.4  19.8
2013 07 13    02 09 34.1 +17 26 22   2.8991  2.8041    74.5    20.4  19.8
2013 07 14    02 10 50.7 +17 32 52   2.8845  2.8016    75.1    20.5  19.8
...
2013 07 20    02 18 21.6 +18 10 33   2.7968  2.7865    78.9    21.0  19.7
...
2013 07 28    02 27 57.0 +18 56 52   2.6795  2.7672    84.2    21.4  19.6
...
2013 08 12    02 44 13.9 +20 10 25   2.4607  2.7332    94.5    21.7  19.3

Computer: Williams

(CBET 3582、MPEC 2013-N48)