Comet P/2005 R1 = 2018 L3 (NEAT)

E. Schwab (Egelsbach, ドイツ)の通報によると、6月13-14日UT、D. AbreuがスペインのTenerife
にあるのESA(欧州宇宙機関)の光学地上局の1.0-m f/4.4 反射望遠鏡で得た画像からP/2005 R1 
(IAUC 8595を参照)を検出した。
この彗星は、6月13日、p.a. 250°に約10"伸びたかすかな尾が見える。
ICQ's 2018 Comet Handbookの中野主一氏の予報に対して、Delta(T)は、-0.07 dayであった。

検出位置は次のとおり、

     2018 UT             R.A. (2000) Decl.       Mag.   Observer
     June 13.18958   23 58 16.14   +16 25 18.4   19.4   Abreu
          13.19712   23 58 16.88   +16 25 25.6   19.5     "
          13.20466   23 58 17.61   +16 25 32.7   19.4     "
          14.17683   23 59 53.47   +16 40 56.8   19.3     "
          14.18437   23 59 54.20   +16 41 04.0   19.2     "
          14.19191   23 59 54.89   +16 41 10.9   19.1     "

連結軌道要素と位置推算表は次のとおり、

Orbital elements:
    P/2005 R1 (NEAT)
Epoch 2005 Sept. 27.0 TT = JDT 2453640.5
T 2005 Oct. 8.41305 TT                                  MPCW
q   2.0470838            (2000.0)            P               Q
n   0.07633789     Peri.  117.95223     +0.92509122     -0.27614993
a   5.5035463      Node   259.06537     +0.18074723     +0.92388329
e   0.6280428      Incl.   15.39592     +0.33397106     +0.26491675
P  12.91
From 360 observations 2005 July 5-2018 June 14, mean residual 0".6.

    P/2005 R1 (NEAT)
Epoch 2018 Aug. 30.0 TT = JDT 2458360.5
T 2018 Sept. 14.25047 TT                                MPCW
q   2.0677913            (2000.0)            P               Q
n   0.07589185     Peri.  118.80486     +0.92629912     -0.27163324
a   5.5250891      Node   257.97761     +0.17793330     +0.92623153
e   0.6257452      Incl.   15.48458     +0.33212903     +0.26136286
P  12.99
From 360 observations 2005 July 5-2018 June 14, mean residual 0".6.

    P/2005 R1 (NEAT)
Epoch 2031 Sept. 11.0 TT = JDT 2463120.5
T 2031 Sept. 23.75432 TT                                MPCW
q   2.0701935            (2000.0)            P               Q
n   0.07578596     Peri.  119.19217     +0.92518505     -0.27507007
a   5.5302343      Node   257.81218     +0.18158262     +0.92582818
e   0.6256590      Incl.   15.51580     +0.33325722     +0.25918843
P  13.01
From 360 observations 2005 July 5-2018 June 14, mean residual 0".6.

    P/2005 R1 (NEAT)
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5
T 2018 Sept. 14.26488 TT                                MPCW
q   2.0677726            (2000.0)            P               Q
n   0.07593575     Peri.  118.80785     +0.92627597     -0.27170900
a   5.5229593      Node   257.97927     +0.17800576     +0.92621529
e   0.6256042      Incl.   15.48468     +0.33215474     +0.26134165
P  12.98
From 360 observations 2005 July 5-2018 June 14, mean residual 0".6.

Ephemeris:
    P/2005 R1 (NEAT)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1
2018 05 15    23 09 43.7 +08 48 16   2.6443  2.3588    62.7    22.4  19.8
...
2018 05 30    23 34 46.8 +12 40 59   2.4441  2.2968    69.6    24.4  19.6
...
2018 06 07    23 48 03.3 +14 47 14   2.3392  2.2661    73.3    25.4  19.4
...
2018 06 13    23 57 57.2 +16 22 18   2.2616  2.2443    76.0    26.0  19.3
2018 06 14    23 59 35.8 +16 38 09   2.2488  2.2407    76.5    26.1  19.3
2018 06 15    00 01 14.2 +16 53 59   2.2360  2.2372    76.9    26.2  19.2
...
2018 06 21    00 11 02.0 +18 28 50   2.1601  2.2168    79.7    26.8  19.1
...
2018 06 29    00 23 56.4 +20 34 12   2.0611  2.1913    83.4    27.4  19.0
...
2018 07 14    00 47 26.4 +24 22 43   1.8830  2.1492    90.6    28.2  18.7

(CBET 4526、MPEC 2018-L76)