J. V. Scotti (月惑星研究所:LPL, Arizona大学)の通報によると6月1日UTと4日UT、Kitt Peak
にあるSpacewatch1.8-m反射望遠鏡で得た画像から21.5等から22.3等のP/2006 R2を検出した。
120秒9枚のスタック画像では限界に近くまだこの天体は微かな恒星状に見えていた。

検出位置は次のとおり、

     2013 UT             R.A. (2000) Decl.       Mag.   Observer
     June  1.29149   15 11 01.89   + 4 07 37.6   22.1   Scotti
           1.30452   15 11 01.43   + 4 07 36.8   22.3     "
           1.31759   15 11 00.96   + 4 07 36.8   22.0     "
           4.28331   15 09 26.07   + 4 06 42.8   21.7     "
           4.29634   15 09 25.66   + 4 06 42.4   22.2     "
           4.30939   15 09 25.26   + 4 06 42.3   21.5     "

MPC 75735のB. G. Marsdenの予報に対し、Delta(T)は、-0.78 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/2006 R2 = 2013 L1 (Christensen)
Epoch 2006 July 4.0 TT = JDT 2453920.5
T 2006 June 15.09745 TT                                 MPC
q   3.0390017            (2000.0)            P               Q
n   0.11587564     Peri.  188.84582     +0.84401207     +0.50386725
a   4.1668509      Node   139.15577     -0.47328336     +0.86088589
e   0.2706718      Incl.   16.31693     -0.25228256     +0.07066313
P   8.51
From 124 observations 2006 Aug. 30-2013 June 4, mean residual 0".6.

    P/2006 R2 = 2013 L1 (Christensen)
Epoch 2014 Dec. 9.0 TT = JDT 2457000.5
T 2014 Dec. 28.44531 TT                                 MPC
q   3.0540581            (2000.0)            P               Q
n   0.11536355     Peri.  189.08497     +0.84520986     +0.50178877
a   4.1791727      Node   139.05815     -0.47101642     +0.86201770
e   0.2692195      Incl.   16.30054     -0.25251499     +0.07164853
P   8.54
From 124 observations 2006 Aug. 30-2013 June 4, mean residual 0".6.

    P/2006 R2 = 2013 L1 (Christensen)
Epoch 2023 June 25.0 TT = JDT 2460120.5
T 2023 July 5.92280 TT                                  MPC
q   3.0341595            (2000.0)            P               Q
n   0.11603064     Peri.  189.14454     +0.84555896     +0.50109790
a   4.1631391      Node   139.04067     -0.47034640     +0.86242966
e   0.2711847      Incl.   16.32004     -0.25259516     +0.07152603
P   8.49
From 124 observations 2006 Aug. 30-2013 June 4, mean residual 0".6.

    P/2006 R2 = 2013 L1 (Christensen)
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5
T 2014 Dec. 28.79493 TT                                 MPC
q   3.0526654            (2000.0)            P               Q
n   0.11539331     Peri.  189.16711     +0.84607704     +0.50035491
a   4.1784540      Node   139.07407     -0.46956545     +0.86281326
e   0.2694271      Incl.   16.29855     -0.25231316     +0.07209890
P   8.54
From 124 observations 2006 Aug. 30-2013 June 4, mean residual 0".6.

Ephemeris:
    P/2006 R2 (Christensen)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1
2013 05 05    15 27 29.4 +03 21 30   3.1256  4.0791   158.2     5.3  22.1
...
2013 05 20    15 18 14.4 +03 58 33   3.1041  4.0443   155.1     6.1  22.0
...
2013 05 28    15 13 26.9 +04 06 47   3.1174  4.0257   149.8     7.3  22.0
...
2013 06 03    15 10 06.6 +04 07 17   3.1379  4.0117   145.1     8.3  22.0
2013 06 04    15 09 35.0 +04 06 53   3.1422  4.0094   144.2     8.5  22.0
2013 06 05    15 09 03.9 +04 06 21   3.1467  4.0070   143.4     8.7  22.0
...
2013 06 11    15 06 10.5 +04 00 18   3.1783  3.9930   138.2     9.8  22.0
...
2013 06 19    15 02 59.7 +03 44 55   3.2320  3.9743   131.1    11.1  22.0
...
2013 07 04    14 59 28.8 +02 55 50   3.3619  3.9391   117.7    13.2  22.1

Computer: Williams

(CBET 3541、MPEC 2013-L19)