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Thursday 31 August 2017

Fwd: [CometObs] Digest Number 3307

1 Message

Digest #3307
1
Comet Observations 30th August 2017 by "Bomber2 Panther" outbackmanyep

Message

Wed Aug 30, 2017 5:49 pm (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 30th August 2017

29P/ Schwassmann-Wachmann 1
2017 Aug 30.68 UT; m1= 12.0; Dia= 0.4'; DC= 7; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Post-outburst. Close to 12th magnitude star. Coma dims in Swan Band filter.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

C/2015 VL62 Lemmon-Yeung-PanSTARRS
2017 Aug 30.70 UT; m1= 13.6; Dia= 0.9'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, low altitude = 17.7°.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

C/2017 O1 ASASSN
2017 Aug 30.71 UT; m1= 9.9; Dia= 5.8'; DC= 4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Enhances in Swan Band filter, diffuse coma with opaque centre.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2015 ER61 PanSTARRS
2017 Aug 30.71 UT; m1= 13.1; Dia= 1.1'; DC= 2/3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Close to faint star. Coma diffuse, weak central condensation.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

217P/ LINEAR
2017 Aug 30.72 UT; m1= 12.9; Dia= 1'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, low altitude = 15.1°.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ




--
Good Clear Skies
--
Astrocomet
--
Colin James Watling
--
Various Voluntary work-Litter Picking for Parish Council (Daytime) and also a friend of Kessingland Beach (Watchman)
--
--
Real Astronomer and head of the Comet section for LYRA (Lowestoft and Great Yarmouth Regional Astronomers) also head of K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)
--
Lyra Main Website: http://www.lyra-astro.co.uk/

Sunday 27 August 2017

Fwd: [CometObs] Digest Number 3306

2 Messages

Digest #3306
1
Observations Aug 14 - Aug 24 by "Thomas Lehmann" ewelot
2
29P in outburst, C/2015 ER61, C/2017 O1. by "Juan Jose Gonzalez" jjgsgp

Messages

Sat Aug 26, 2017 12:11 am (PDT) . Posted by:

"Thomas Lehmann" ewelot


Please find enclosed a list of my recent comet observations in ICQ format.
Magnitudes are derived from large aperture photometry of CCD/DSLR images
(using green filter or green color channel) and are supposed to conform
to visual estimates of total coma magnitudes.

Remote observations were carried out using telescopes from iTelescope.net.
For image reduction and photometric analysis I used my AIRTOOLS software
(see https://github.com/ewelot/airtools).

Thomas Lehmann
Weimar, Germany

2015ER612017 08 23.80 C 11.5 AQ 40.0L 4a600 9 0.46 267 LEHaa 20.4 CCD/G remote (SSO)

2015V2 2017 08 23.39 C 9.6 TK 10.6R 5a600 15 LEHaa 17.6 CCD/G remote (SSO)

2016M1 2017 08 14.84 C 15.4 AQ 20.0L 4A320 0.7 LEHaa 19.1 DSLR green

2016R2 2017 08 22.80 C 14.4 AQ 40.0L 4a720 2.1 0.04 246 LEHaa 20.4 CCD/G remote (SSO)

2 2017 08 17.58 C 17.7 AQ 40.0L 4a600 1 LEHaa 20.6 CCD/G remote (SSO), dust trail total length 2' at pa=253 ##'

71 2017 08 24.39 C 13.0 TK 10.6R 5a600 2.6 LEHaa 18.4 CCD/G remote (SSO), in field of dense milky way clouds

Sat Aug 26, 2017 4:35 am (PDT) . Posted by:

"Juan Jose Gonzalez" jjgsgp

29P/Schwassmann-Wachmann:
2017 Aug. 25.00 UT: m1=12.5, Dia.=0.7', DC=6, 20 cm SCT (133x).
[ In outburst. Starlike central condensation : m2=13.7 (APASS).
Brighter inner coma diameter : 0.7', providing m=12.5 (APASS).
Faint and diffuse outer coma diameter : 3', providing m=10.5: (Tycho-2).
( This faint 3' outer coma, remnant of previous outbursts, was also
observed in pre-outburst dates : Aug. 16.91 and 20.92 UT ).
Sidgwick method. Field stars checked in DSS. Altitude: 33 deg. SQM : 21.4.].

C/2015 ER61 (PANSTARRS):
2017 Aug. 25.17 UT: m1=10.6, Dia.=3', DC=2, 20 cm SCT (100x).
[ Sidgwick method. Tycho-2 comparison stars. SQM : 21.3.].

C/2017 O1 (ASASSN):
2017 Aug. 25.15 UT: m1=8.7, Dia.=8', DC=3, 25x100B.
[ In 20 cm SCT (77x) : m1=9.0, Dia.=6', DC=3.
Sidgwick method. Tycho-2 comparison stars. SQM : 21.4.].

( Puerto del Pando - Prioro, Leon, Spain; Alt. 1430 m, 42º 56' N, 4º 57' W;
Mountain location, clear sky. SQM 21.5 at zenith.).

----------------------------------------------------------
ICQ Format :

29 2017 08 25.00 S 12.5 AQ 20.3T10 133 0.7 6 ICQ
XX GON05

2015ER612017 08 25.17 S 10.6 TK 20.3T10 100 3 2 ICQ XX GON05

2017O1 2017 08 25.14 S 9.0 TK 20.3T10 77 6 3 ICQ XX GON05

2017O1 2017 08 25.15 S 8.7 TK 10.0B 25 8 3 ICQ XX GON05

----------------------------------------------------------

J. J. Gonzalez

----------------------------------------------------------




--
Good Clear Skies
--
Astrocomet
--
Colin James Watling
--
Various Voluntary work-Litter Picking for Parish Council (Daytime) and also a friend of Kessingland Beach (Watchman)
--
--
Real Astronomer and head of the Comet section for LYRA (Lowestoft and Great Yarmouth Regional Astronomers) also head of K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)
--
Lyra Main Website: http://www.lyra-astro.co.uk/

Friday 25 August 2017

Fwd: [CometObs] Digest Number 3305

1 Message

Digest #3305
1
Comet Observations 23rd August 2017 by "Bomber2 Panther" outbackmanyep

Message

Thu Aug 24, 2017 2:03 am (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 23rd August 2017

C/2015 V2 Johnson
2017 Aug 23.43 UT; m1= 10.3; Dia= 4.2'; DC= 5; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, opaque centre.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

71P/ Clark
2017 Aug 23.43 UT; m1= 12.7; Dia= 1'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, slight brightening to centre. Close to background stars, possibly just seeing central portions of the coma.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

C/2015 VL62 Lemmon-Yeung-PanSTARRS
2017 Aug 23.44 UT; m1= 13.7; Dia= 0.7'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

29P/ Schwassmann-Wachmann 1
2017 Aug 23.45 UT; m1= 13.9; Dia= 1.1'; DC= 2; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Very diffuse.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ




--
Good Clear Skies
--
Astrocomet
--
Colin James Watling
--
Various Voluntary work-Litter Picking for Parish Council (Daytime) and also a friend of Kessingland Beach (Watchman)
--
--
Real Astronomer and head of the Comet section for LYRA (Lowestoft and Great Yarmouth Regional Astronomers) also head of K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)
--
Lyra Main Website: http://www.lyra-astro.co.uk/

Thursday 24 August 2017

Fwd: [CometObs] Digest Number 3303

1 Message

Digest #3303
1
Comets 21 Aug. 2017 by "Gábor Sánta" santa.gabor

Message

Tue Aug 22, 2017 8:12 am (PDT) . Posted by:

"Gábor Sánta" santa.gabor

Hello to the group,

Here are my visual comet observations from 21 Aug. All of them were made by
my own telescope (355/1650 Dobsonian). Sky was good, naked eye limiting
magnitude was at about 5,5-6,0. Far suburban site, Göd, Hungary.

C/2016 M1 (PanSTARRS)

Aug. 21,83 UT, m1=14,8, d=0,33' (20"), DC=0. 0.35-m L, 351x. Coma is
diffuse but very obvious.

C/2015 O1 (PanSTARRS)

Aug. 21,85 UT, m1=14,3, d=0,4', DC=2-3. 0.35-m L, 351x. Coma is next to a
14.5 mag star, but very obvious. Moving was detected in a half an hour
period.

C/2015 VL62 (Lemmon-Yeung-PanSTARRS)

Aug. 21,92 UT, m1=14,2, d=0,5', DC=1-2. 0.35-m L, 351x. Slightly difficult
to see, but its OK. Moving was detected in a 20-min period.

C/2016 N4 (MASTER)

Aug. 21,94 UT, m1=14,8, d=0,4', DC=0. 0.35-m L, 351x. Bit difficult to see,
but I'm sure its real. Movig was detected in a half an hour period. 15,4
mag stars were visible.

In this night I got a clear view about NGC 7009 (Saturn nebula) with its
lobes, and also about Campbell's Hydrogen Star, which had really, very-very
red colour!

Gabor Santa
Hungary
HAA member, deepsky, comet sections



--
Good Clear Skies
--
Astrocomet
--
Colin James Watling
--
Various Voluntary work-Litter Picking for Parish Council (Daytime) and also a friend of Kessingland Beach (Watchman)
--
--
Real Astronomer and head of the Comet section for LYRA (Lowestoft and Great Yarmouth Regional Astronomers) also head of K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)
--
Lyra Main Website: http://www.lyra-astro.co.uk/

Fwd: [CometObs] Digest Number 3304

1 Message

Digest #3304
1
C/2015 ER61, C/2017 O1, 217P. by "Juan Jose Gonzalez" jjgsgp

Message

Wed Aug 23, 2017 3:56 am (PDT) . Posted by:

"Juan Jose Gonzalez" jjgsgp

C/2015 ER61 (PANSTARRS):
2017 Aug. 21.08 UT: m1=10.5, Dia.=3', DC=2, 20 cm SCT (100x).
[ Sidgwick method. Tycho-2 comparison stars. SQM : 21.2.].

C/2017 O1 :
2017 Aug. 21.11 UT: m1=8.8, Dia.=7', DC=3, 25x100B.
[ In 20 cm SCT (77x) : m1=9.0, Dia.=6', DC=3/.
Sidgwick method. Tycho-2 comparison stars. SQM : 21.2.].

217P/LINEAR:
2017 Aug. 21.12 UT: m1=12.2, Dia.=2', DC=3, 20 cm SCT (133x).
[ Field stars checked in DSS. Altitude: 18 deg.
Sidgwick method. APASS comparison stars. SQM : 20.9.].

( Alto del Castro - Aralla, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W;
Mountain location, very clear sky. SQM 21.4 at zenith.).

----------------------------------------------------------
ICQ Format :

2015ER612017 08 21.08 S 10.5 TK 20.3T10 100 3 2 ICQ
XX GON05

2017O1 2017 08 21.10 S 9.0 TK 20.3T10 77 6 3/ ICQ
XX GON05

2017O1 2017 08 21.11 S 8.8 TK 10.0B 25 7 3 ICQ
XX GON05

217 2017 08 21.12 S 12.2 AQ 20.3T10 1332 3ICQ XX GON05

----------------------------------------------------------

J. J. Gonzalez

----------------------------------------------------------




--
Good Clear Skies
--
Astrocomet
--
Colin James Watling
--
Various Voluntary work-Litter Picking for Parish Council (Daytime) and also a friend of Kessingland Beach (Watchman)
--
--
Real Astronomer and head of the Comet section for LYRA (Lowestoft and Great Yarmouth Regional Astronomers) also head of K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)
--
Lyra Main Website: http://www.lyra-astro.co.uk/

Monday 21 August 2017

Fwd: [CometObs] Digest Number 3302

3 Messages

Digest #3302
1
Comet Observations 17th August 2017 by "Bomber2 Panther" outbackmanyep
2
Comet Observations 19th August 2017 by "Bomber2 Panther" outbackmanyep
3
Visual observations of comets on 18/19 Aug. by "Gábor Sánta" santa.gabor

Messages

Sat Aug 19, 2017 10:57 pm (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 17th August 2017

C/2015 V2 Johnson
2017 Aug 17.41 UT; m1= 10.1; Dia= 3.2'; DC= 5; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Coma centre well condensed, enhances slightly in Swan band filter.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

71P/ Clark
2017 Aug 17.42 UT; m1= 11.9; Dia= 2'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Weak central condensation, diffuse coma. Does not enhance in Swan Band filter.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

C/2017 O1 ASASSN-1
2017 Aug 17.67 UT; m1= 9.9; Dia= 5.5'; DC= 3/4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Enhances strongly in Swan Band filter. Inner coma opaque, moderately condensed.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2015 VL62 Lemmon-Yeung-PanSTARRS
2017 Aug 17.68 UT; m1= 13.7; Dia= 0.8'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, slight brightening to centre.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

C/2015 ER61 PanSTARRS
2017 Aug 17.69 UT; m1= 12.1; Dia= 1.2'; DC= 2; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma very diffuse. Comet on edge of Pleiades star cluster. Low altitude = 12.1°.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

Sat Aug 19, 2017 10:58 pm (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 19th August 2017

C/2015 V2 Johnson
2017 Aug 19.42 UT; m1= 10.5; Dia= 3.5'; DC= 5; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, moderately condensed centre, enhances slightly in Swan band filter.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

71P/ Clark
2017 Aug 19.44 UT; m1= 11.8; Dia= 2.1'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Does not enhance in Swan band filter, background star in coma.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

29P/ Schwassmann-Wachmann 1
2017 Aug 19.46 UT; m1= 13.9; Dia= 0.8'; DC= 2; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma very diffuse.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

C/2015 VL62 Lemmon-Yeung-PanSTARRS
2017 Aug 19.46 UT; m1= 13.7; Dia= 1'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, slight brightening to centre.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

C/2017 O1 ASASSN-1
2017 Aug 19.72 UT; m1= 9.5; Dia= 6'; DC= 4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Coma large and diffuse, opaque centre, moderately condensed. Enhances well in Swan Band filter, pale aqua-blue in colour.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2015 ER61 PanSTARRS
2017 Aug 19.72 UT; m1= 12.5; Dia= 1.5'; DC= 2; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, on edge of Pleaides star cluster, close to star but distinguishable.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

217P/ LINEAR
2017 Aug 19.74 UT; m1= 12.8; Dia= 1'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, slight brightening to centre, low altitude = 18.6°.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

Sun Aug 20, 2017 8:43 am (PDT) . Posted by:

"Gábor Sánta" santa.gabor

Hello to the group,

Here are my visual comet observations from 18/19 Aug. All of them were made
by Sándor Szabó's 0.60-m f/4 Dobsonian telescope (603/2440) from Tarján,
Hungary. Hilltop site, elevation 252 m. Sky was so good, naked eye limiting
magnitude was at about 6-6,5.

65P/Gunn

Aug. 18,82 UT m1=13-13,5:, dia.=1', DC=0. 0.60 m reflecting telescope,
244x. Comet is barely visible due to low altitude.

C/2016 N6 (PanSTARRS)

Aug. 18,99 UT m1=15,0; dia.=0,35' (20"), DC=0-1. 0,60-m reflecting
telescope, 305x. Checked on a photo taken on the same night and same
location by Ákos Nagy Mélykuti.

C/2015 ER61 (PanSTARRS)

Aug. 19,00 UT m1=12,1; dia.=1', DC=4. 0,60-m reflecting telescope, 184x.
Coma is so diffuse and round.

C/2017 O1 (ASASSN)

Aug. 19,01 UT m1=10,7 dia.=2,5', m2=15:, DC=s4. 0,60-m reflecting
telescope, 184x. Huge coma with dim nucleus.

C/2011KP36 (Spacewatch)

Aug. 19,03 UT m1=15,4; dia.=0,35' (20"), DC=0. 0,60-m reflecting telescope,
520x. Checked on a photo taken on the same night and same location by Ákos
Nagy Mélykuti.

145P/Shoemaker-Levy 5

Aug. 19,05 UT m1=16,0; dia.=0,25' (15"), DC=0. 0,60-m reflecting telescope,
520x. Seen twice in this night. Datas estimated at the second time. Motion
was detected in a half an hour period. Checked on a photo taken on the same
night and same location by Ákos Nagy Mélykuti.

217P/LINEAR

Aug. 19,06 UT m1=12,5; dia.=1', DC=3. 0,60-m reflecting telescope, 184x.

Gabor Santa
Hungary
HAA member, deepsky, comet sections

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--
Good Clear Skies
--
Astrocomet
--
Colin James Watling
--
Various Voluntary work-Litter Picking for Parish Council (Daytime) and also a friend of Kessingland Beach (Watchman)
--
--
Real Astronomer and head of the Comet section for LYRA (Lowestoft and Great Yarmouth Regional Astronomers) also head of K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)
--
Lyra Main Website: http://www.lyra-astro.co.uk/