P 2011 W2 RINNER = 373P RINNER
COD C10
OBS J.-F. Soulier
MEA J.-F. Soulier
TEL 0.30-m f/3.8 Newtonian reflector + CCD
NET UCAC-4
0373P
KC2018 12 13.79621 02 36 08.29 +13 39
59.5 18.2
N C10
0373P
KC2018 12 13.80827 02 36 08.17 +13 39
54.7 18.2
N C10
0373P
KC2018 12 13.82033 02 36 08.04 +13 39
49.5 18.2
N C10
----- end -----
COMET P/2018 R2 = P/2011 W2 (RINNER)
K. Sarneczky and R. Szakats, Konkoly Observatory, report their recovery
of comet P/2011 W2 (cf. IAUC 9244) on unfiltered CCD exposures taken with the
0.60-m Schmidt telescope at the Piszkesteto Station of Konkoly Observatory
(astrometry tabulated below); on both Sept. 14.1 and 16.1 UT, the comet
appeared nearly stellar in appearance. G. V. Williams reports (cf. MPEC
2018-S3) the independent recovery of this comet by J. F. Soulier,
Maisoncelles, France, on images taken with a 0.3-m f/3.8 reflector on Sept.
9 and 12. The astrometry is tabulated below.
2018 UT R.A. (2000) Decl. Mag. Observer
Sept. 9.02974 3 06 27.51 +24 02 09.2 21.1 Soulier
9.04837 3 06 28.04 +24 02 09.2 21.2 "
9.06701 3 06 28.61 +24 02 09.2 21.0 "
12.04009 3 07 48.59 +24 01 16.5 21.3 "
12.09095 3 07 49.80 +24 01 14.3 20.9 "
12.09105 3 07 49.81 +24 01 14.7 21.0 "
12.14212 3 07 51.10 +24 01 13.1 21.4 "
14.11274 3 08 37.35 +23 59 56.0 20.4 Szakats
14.12567 3 08 37.68 +23 59 54.9 20.4 "
16.06340 3 09 18.16 +23 58 04.5 20.6 "
16.07958 3 09 18.42 +23 58 03.9 20.5 "
The indicated correction to the prediction by Williams on MPC 102105 is
Delta(T) = -0.43 day. The indicated correction to the prediction by S.
Nakano in the ICQ 2018 Comet Handbook is Delta(T) = -0.40 day.
The following linked orbital elements by Williams (from 574 observations
spanning 2011 Nov. 28-2018 Sept. 16; mean residual 0".6) and an updated
ephemeris appear on MPC 2018-S3.
Epoch = 2019 Apr. 27.0 TT
T = 2019 Apr. 9.11945 TT Peri. = 221.20565
e = 0.3924395 Node = 231.95840 2000.0
q = 2.3134105 AU Incl. = 13.75756
a = 3.8077041 AU n = 0.13265062 P = 7.43 years
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2018 CBAT
2018
September 16
(CBET 4555)
Daniel W. E. Green
COMET P/2011 W2 = 2018 R2 (Rinner)
This comet has been recovered independently by J.-F. Soulier (C10) and
K. Sarneczky (461). Sarneczky reported that the comet appeared almost stellar
on images taken on Sept. 14 and 16. The indicated Delta-T correction to the
prediction, by the undersigned, on MPC 102105 is -0.43 days.
Observations:
PK18R020*KC2018 09 09.02974 03 06 27.51 +24 02 09.2 21.1 NqES003C10
PK18R020 KC2018 09 09.04837 03 06 28.04 +24 02 09.2 21.2 NqES003C10
PK18R020 KC2018 09 09.06701 03 06 28.61 +24 02 09.2 21.0 NqES003C10
PK18R020 KC2018 09 12.04009 03 07 48.59 +24 01 16.5 21.3 NqES003C10
PK18R020 KC2018 09 12.09095 03 07 49.80 +24 01 14.3 20.9 NqES003C10
PK18R020 KC2018 09 12.09105 03 07 49.81 +24 01 14.7 21.0 NqES003C10
PK18R020 KC2018 09 12.14212 03 07 51.10 +24 01 13.1 21.4 NqES003C10
PK18R020 KC2018 09 14.11274 03 08 37.35 +23 59 56.0 20.4 ToES003461
PK18R020 KC2018 09 14.12567 03 08 37.68 +23 59 54.9 20.4 ToES003461
PK18R020 KC2018 09 16.06340 03 09 18.16 +23 58 04.5 20.6 ToES003461
PK18R020 KC2018 09 16.07958 03 09 18.42 +23 58 03.9 20.5 ToES003461
Observer details:
461 University of Szeged, Piszkesteto Stn. (Konkoly). Observer R. Szakats.
Measurer K. Sarneczky. 0.60-m Schmidt + CCD.
C10 Maisoncelles. Observer J.-F. Soulier. 0.30-m f/3.8 Newtonian reflector
+ CCD.
Orbital elements:
P/2011 W2 (Rinner)
Epoch 2011 Nov. 15.0 TT = JDT 2455880.5
T
2011 Nov. 6.19818 TT
MPCW
q 2.3029807
(2000.0) P
Q
n 0.13313572 Peri. 221.06158 -0.03881041 -0.98146792
a 3.7984491 Node 232.01658 +0.96770136 +0.00989782
e 0.3937050 Incl. 13.77349 +0.24909402 -0.19137073
P 7.40
From 574 observations 2011 Nov. 28-2018 Sept. 16, mean residual 0".6.
P/2011 W2 (Rinner)
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5
T
2019 Apr. 9.11945 TT
MPCW
q 2.3134105
(2000.0) P
Q
n 0.13265062 Peri. 221.20565 -0.04031060 -0.98147650
a 3.8077041 Node 231.95840 +0.96771507 +0.00832606
e 0.3924395 Incl. 13.75756 +0.24880232 -0.19140156
P 7.43
From 574 observations 2011 Nov. 28-2018 Sept. 16, mean residual 0".6.
P/2011 W2 (Rinner)
Epoch 2026 Aug. 28.0 TT = JDT 2461280.5
T
2026 Sept. 5.00077 TT
MPCW
q
2.3009536 (2000.0)
P
Q
n 0.13320413 Peri. 221.15731 -0.03923932 -0.98149023
a 3.7971486 Node 231.94604 +0.96775603 +0.00938328
e 0.3940312 Incl. 13.77158 +0.24881426 -0.19128218
P 7.40
From 574 observations 2011 Nov. 28-2018 Sept. 16, mean residual 0".6.
P/2011 W2 (Rinner)
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5
T
2019 Apr. 9.22404 TT
MPCW
q 2.3129311
(2000.0) P
Q
n 0.13267244 Peri. 221.24673 -0.04102927 -0.98144573
a 3.8072866 Node 231.95930 +0.96772083 +0.00761883
e 0.3924988 Incl. 13.75778 +0.24866240 -0.19158872
P 7.43
From 574 observations 2011 Nov. 28-2018 Sept. 16, mean residual 0".6.
Ephemeris:
P/2011 W2 (Rinner)
Date
TT R. A. (2000) Decl. Delta
r Elong. Phase m1
m2
2018 08 17 02 50 23.0 +23 31 16 2.5026 2.8054 96.6 21.0 21.0
...
2018 09 01 03 01 55.6 +23 58 35 2.2648 2.7538 108.3 20.4 20.7
...
2018 09 09 03 06 26.5 +24 02 12 2.1438 2.7269 115.0 19.6 20.5
...
2018 09 15 03 08 56.5 +23 59 11 2.0568 2.7070 120.3 18.7 20.4
2018 09 16 03 09 16.8 +23 58 10 2.0427 2.7037 121.2 18.6 20.4
2018 09 17 03 09 35.8 +23 57 00 2.0287 2.7004 122.1 18.4 20.4
...
2018 09 23 03 10 59.6 +23 46 45 1.9475 2.6809 127.6 17.2 20.2
...
2018 10 01 03 11 29.2 +23 23 53 1.8472 2.6553 135.5 15.3 20.1
...
2018 10 16 03 08 07.1 +22 10 16 1.6902 2.6090 151.3 10.6 19.8
Gareth
V. Williams (C) Copyright 2018 MPC
M.P.E.C. 2018-S03
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