MPEC 2018-Y52 : COMET C/2018 Y1 (Iwamoto)
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M.P.E.C. 2018-Y52 Issued 2018 Dec. 20, 18:04 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Division F of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
COMET C/2018 Y1 (Iwamoto)
I. Enoh (National Astronomical Observatory of Japan) reported the
discovery of a potential comet by M. Iwamoto (872). Confirmation of the
cometary nature came from K. Kadota (349), who reported a 2' diffuse coma
with central condensation and no tail. A. Hale reported his visual
confirmation from Cloudcroft, NM on Dec. 20.51 UTC (mag. 11.5, 3'.1 coma,
0.41-m reflector). H. Sato (H06, Dec. 20.5319 UTC) reported a strongly-
condensed object with an outer coma 2'.9 in diameter and no obvious tail.
B. Lutkenhoner (H06, Dec. 20.5315 UTC) reported a clear central condensation
and a coma diameter exceeding 1'. E. Guido (H06, Dec. 20.538 UTC), described
a ~ 1'.5 diffuse coma with a sharp central condensation. M. Suzuki (W88)
reported a 1'.0 coma with a strong central condensation.
Observations:
CK18Y010* C2018 12 18.8410 14 17 45.33 -24 44 13.4 12 RzEY052872
CK18Y010 C2018 12 18.8417 14 17 45.36 -24 44 15.8 zEY052872
CK18Y010 C2018 12 19.83490 14 17 43.14 -24 41 53.7 13.4 RmEY052349
CK18Y010 C2018 12 19.84200 14 17 43.14 -24 41 53.0 mEY052349
CK18Y010 C2018 12 19.84908 14 17 43.12 -24 41 52.6 mEY052349
CK18Y010 #C2018 12 20.32523 14 17 41.80 -24 40 35.0 13.9 GVEY052W88
CK18Y010 #C2018 12 20.34097 14 17 41.71 -24 40 32.3 13.8 GVEY052W88
CK18Y010 VC2018 12 20.53154 14 17 40.92 -24 40 08.2 16.2 RUEY052H06
CK18Y010 |C2018 12 20.53197 14 17 40.90 -24 40 08.5 VEY052H06
CK18Y010 VC2018 12 20.53470 14 17 40.92 -24 40 07.8 16.2 RUEY052H06
CK18Y010 |C2018 12 20.53571 14 17 40.85 -24 40 08.0 12.3 GVEY052H06
CK18Y010 %C2018 12 20.53800 14 17 40.93 -24 40 07.4 15.2 GVEY052H06
CK18Y010 %C2018 12 20.53981 14 17 40.90 -24 40 07.8 15.5 GVEY052H06
CK18Y010 VC2018 12 20.54277 14 17 40.88 -24 40 06.5 16.2 RUEY052H06
CK18Y010 C2018 12 20.65085 14 17 40.58 -24 39 48.7 16.2 RqEY052T03
CK18Y010 C2018 12 20.66220 14 17 40.52 -24 39 47.3 16.2 RqEY052T03
CK18Y010 C2018 12 20.66409 14 17 40.53 -24 39 47.1 16.1 RqEY052T03
Observer details:
349 Ageo. Observer K. Kadota. 0.25-m f/5.0 reflector + CCD.
872 Tokushima. Observer M. Iwamoto. Measurer S. Nakano.
H06 iTelescope Observatory, Mayhill. Observers B. Lutkenhoner, H. Sato,
E. Guido. 0.43-m f/6.8 reflector + CCD + f/4.5 focal reducer, 0.25-m
f/3.4 astrograph + CCD, 0.1-m f/5.0 astrograph + CCD.
T03 Haleakala-LCO Clamshell #3. Observer A. Hale. Measurer R. Miles.
0.40-m f/10 Schmidt-Cassegrain + CCD.
W88 Slooh.com Chile Observatory, La Dehesa. Observer M. Suzuki. 0.35-m
f/11.0 Schmidt-Cassegrain + CCD.
Orbital elements:
C/2018 Y1 (Iwamoto)
T 2019 Jan. 27.15942 TT MPCW
q 1.1407250 (2000.0) P Q
Peri. 354.05242 -0.83236045 +0.51328223
Node 140.77734 +0.52115657 +0.59647173
e 1.0 Incl. 160.69126 +0.18860516 +0.61705982
From 17 observations 2018 Dec. 18-20.
Ephemeris:
C/2018 Y1 (Iwamoto)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2018 11 20 14 13 19.7 -25 24 51 2.4430 1.5601 20.9 13.1 13.9
...
2018 12 05 14 16 39.1 -25 07 58 2.1246 1.4161 33.8 22.8 13.1
...
2018 12 13 14 17 36.8 -24 56 00 1.9189 1.3471 41.3 28.9 12.7
...
2018 12 19 14 17 44.8 -24 43 50 1.7489 1.3000 47.2 33.8 12.4
2018 12 20 14 17 42.5 -24 41 25 1.7193 1.2926 48.2 34.6 12.3
2018 12 21 14 17 38.9 -24 38 52 1.6894 1.2853 49.2 35.4 12.2
...
2018 12 27 14 16 48.4 -24 20 16 1.5028 1.2448 55.5 40.6 11.8
...
2019 01 04 14 13 53.5 -23 42 02 1.2366 1.1997 64.2 47.6 11.3
...
2019 01 19 13 55 20.0 -20 36 00 0.6968 1.1483 84.4 58.5 9.8
Gareth V. Williams (C) Copyright 2018 MPC M.P.E.C. 2018-Y52
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