Fwd: [CometObs] Digest Number 3613

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Digest #3613

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Comet Observations 28th August 2019 by "Bomber2 Panther" outbackmanyep

2

C/2017 T2, C/2018 W2, 29P, 68P, 260P - 27 + 28 August 2019 - J J Gon by "jjgonzalez jjgonzalez" jjgsgp

Messages

1

Comet Observations 28th August 2019

Thu Aug 29, 2019 1:26 am (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 28th August 2019

C/2017 M4 ATLAS
2019 August 28.41 UT; m1= 14.8; Dia= 0.5'; DC= 2/3; 40cm L, f:4.5 (x261) [Chris Wyatt, Walcha, NSW, Australia]
Very diffuse, small with weakly condensed centre. Seeing poor, sky slightly hazy with raised dust.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

68P/ Klemola
2019 August 28.43 UT; m1= 13.3; Dia= 1.3'; DC= 4/5; 40cm L, f:4.5 (x108) [Chris Wyatt, Walcha, NSW, Australia]
No enhancement in Swan Band filter. Moderately condensed opaque centre fading rapidly to semi-transparent outer coma.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

C/2017 B3 LINEAR
2019 August 28.70 UT; m1= 14.0; Dia= 1.3'; DC= 5/6; 40cm L, f:4.5 (x108) [Chris Wyatt, Walcha, NSW, Australia]
Opaque centre, sometimes stellar pseudo-nucleus visible, fading to edges. Does not enhance in Swan Band filter.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

29P/ Schwassmann-Wachmann 1
2019 August 28.71 UT; m1= 13.8; Dia= 1.6'; DC= 1; 40cm L, f:4.5 (x108) [Chris Wyatt, Walcha, NSW, Australia]
Very diffuse, no pseudo-nucleus visible.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

260P/ McNaught
2019 August 28.71 UT; m1= 12.6; Dia= 1.1'; DC= 6; 40cm L, f:4.5 (x59) [Chris Wyatt, Walcha, NSW, Australia]
Faint tail visible, traced to 4' in length in P.A. 246° approximately. Stellar pseudo-nucleus, opaque inner coma, faint outer coma. Coma dims in Swan Band filter, centre still visible.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

C/2018 N2 ASASSN
2019 August 28.75 UT; m1= 12.3; Dia= 1'; DC= 5/6; 40cm L, f:4.5 (x108) [Chris Wyatt, Walcha, NSW, Australia]
Interference by background star in coma, coma small with opaque centre. Dims in Swan Band filter, visible at x58.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

C/2017 T2 PanSTARRS
2019 August 28.75 UT; m1= 13.8; Dia= 0.7'; DC= 6; 40cm L, f:4.5 (x108) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, faint stellar pseudo-nucleus.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

C/2018 A6 Gibbs
2019 August 28.76 UT; m1= 14.0; Dia= 0.5'; DC= 6; 40cm L, f:4.5 (x261) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, faint stellar pseudo-nucleus.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

C/2019 A9 PanSTARRS
2019 August 28.77 UT; m1= 12.3; Dia= 1'; DC= 5/6; 40cm L, f:4.5 (x108) [Chris Wyatt, Walcha, NSW, Australia]
Enhances in Swan Band filter, very diffuse transparent outer coma brightening to a small and well condensed and sometimes stellar centre.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

2017M4 2019 08 28.41 xS 14.8 AQ 40.0L 4 261 0.5 2/ ICQ XX WYA
68 2019 08 28.43 xM 13.3 AQ 40.0L 4 108 1.3 4/ ICQ XX WYA
2017B3 2019 08 28.70 xM 14.0 AQ 40.0L 4 108 1.3 5/ ICQ XX WYA
29 2019 08 28.71 xS 13.8 AQ 40.0L 4 108 1.6 1 ICQ XX WYA
260 2019 08 28.71 xM 12.6 AQ 40.0L 4 59 1.1 6 4.0m246 ICQ XX WYA
2018N2 2019 08 28.75 xM 12.3 AQ 40.0L 4 108 1.0 5/ ICQ XX WYA
2017T2 2019 08 28.75 xM 13.8 AQ 40.0L 4 108 0.7 6 ICQ XX WYA
2018A6 2019 08 28.76 xM 14.0 AQ 40.0L 4 261 0.5 6 ICQ XX WYA
2019A9 2019 08 28.77 xM 12.3 AQ 40.0L 4 108 1.0 5/ ICQ XX WYA

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C/2017 T2, C/2018 W2, 29P, 68P, 260P - 27 + 28 August 2019 - J J Gon

Thu Aug 29, 2019 10:17 am (PDT) . Posted by:

"jjgonzalez jjgonzalez" jjgsgp

C/2017 T2 (PANSTARRS):
2019 Aug. 28.14 UT: m1=8.8, Dia.=8', DC=2, 20 cm SCT (77x).
[ Altitude: 37°. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2.].

C/2018 W2 (Africano):
2019 Aug. 28.05 UT: m1=9.9, Dia.=5', DC=2/, 20 cm SCT (77x).
[ Sidgwick method. Tycho-2 comparison stars. SQM: 21.4.].

29P/Schwassmann-Wachmann:
2019 Aug. 27.96 UT: m1=11.0, Dia.=3', DC=2, 20 cm SCT (100x).
[ Faint and diffuse outer coma diameter 3', remnant of previous outbursts.
Nearby field stars checked in DSS. Sidgwick method. Tycho-2 comparison stars.
SQM: 21.3.].

68P/Klemola:
2019 Aug. 27.94 UT: m1=11.1, Dia.=2.5', DC=3, 20 cm SCT (77x).
[ Brighter inner coma diameter 2'.5, providing m=11.1.
Faint and diffuse outer coma diameter 10', providing m=9.8.
Altitude: 25°. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1.].

260P/McNaught:
2019 Aug. 28.11 UT: m1=11.5, Dia.=1.5', DC=4, 20 cm SCT (100x).
[ Sidgwick method. Tycho-2 comparison stars. SQM: 21.5.].

( Alto del Castro, Leon, Spain, 42º 55' N, 5º 48' W, alt. 1720 m;
SQM 21.5 at zenith ).

J. J. Gonzalez Suarez

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Good Clear Skies

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Astrocomet

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Colin James Watling

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Various Voluntary work-Litter Picking for Parish Council (Daytime) and also a friend of Kessingland Beach (Watchman)

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Real Astronomer and head of the Comet section for K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the stars