Wednesday 31 May 2017

Charts-info Astrosite Groningen (May 31, 2017)

We have prepared the following new chart for our homepage:

C/2015 ER61 (PANSTARRS):-a 6x8 degrees chart for the period 2 - 12 June 2017

This new chart is now available in the charts section of our  mainpage at:

http://www.shopplaza.nl/astro    Reinder Bouma/Edwin van Dijk

Good Clear Skies

Astrocomet

Colin James Watling

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

Profile: http://www.google.com/profiles/astrocomera

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 28 May 2017

Fwd: [CometObs] Digest Number 3266

Comet Observations Group

4 Messages

Digest #3266

Comet Observations 26th May 2017 by "Bomber2 Panther" outbackmanyep

Comet Observations *Correction* 26th May 2017 by "Bomber2 Panther" outbackmanyep

41P, C/2015 V2 by danilam130

Comet Observations 27th May 2017 by "Bomber2 Panther" outbackmanyep

Messages

1 Comet Observations 26th May 2017

Sat May 27, 2017 4:17 am (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 26th May 2017

C/2015 V2 Johnson
2017 May 26.48 UT; m1= 7.6; Dia= 12.1'; DC= 4; 7x50 B [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, gradual brightening to centre, coma extended to the NW approximately.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

65P/ Clark
2017 May 26.50 UT; m1= 13.7; Dia= 0.9'; DC= 1; 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

71P/ Clark
2017 May 26.51 UT; m1= 11.1; Dia= 1'; DC= 5/6; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, bright central condensation, sometimes stellar. Coma appears larger at lower magnification.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

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2 Comet Observations Correction 26th May 2017

Sat May 27, 2017 4:23 am (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 26th May 2017 (Correction to 65P, as per below, should read 'Gunn' not 'Clark', apologies for the inconvenience)

C/2015 V2 Johnson
2017 May 26.48 UT; m1= 7.6; Dia= 12.1'; DC= 4; 7x50 B [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, gradual brightening to centre, coma extended to the NW approximately.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

65P/ Gunn
2017 May 26.50 UT; m1= 13.7; Dia= 0.9'; DC= 1; 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

71P/ Clark
2017 May 26.51 UT; m1= 11.1; Dia= 1'; DC= 5/6; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, bright central condensation, sometimes stellar. Coma appears larger at lower magnification.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

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3a

41P, C/2015 V2

Sat May 27, 2017 2:02 pm (PDT) . Posted by:

danilam130

Hi all!

VIS:
41P:

2017 May 27.86 UT: m1=9.8, Dia.=4', DC=2/, ...25-cm L (42x, 70x, 150x) ...Danil Sidorko (Korenovsk, Russia) [SQM = 20.51]

C/2015V2:

2017 May. 27.85 UT: m1=7.8, Dia.=5.4', DC=4, tail 8' in RA 315 ...25-cm L (42x, 70x) ...Danil Sidorko (Korenovsk, Russia) [SQM = 20.51]

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4 Comet Observations 27th May 2017

Sat May 27, 2017 5:42 pm (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 27th May 2017

C/2015 V2 Johnson
2017 May 27.42 UT; m1= 7.5; Dia= 15'; DC= 4; 7x50 B [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, opaque centre, moderately condensed. Coma extended to NW approximately.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

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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)

Profile: http://www.google.com/profiles/astrocomera

Lyra Main Website: http://www.lyra-astro.co.uk/

Saturday 27 May 2017

Fwd: [CometObs] Digest Number 3265

Comet Observations Group

2 Messages

Digest #3265

OBS-V: C/2015 V2 (Johnson) by scholten0dcs

C/2015 ER61, C/2015 V2, 41P, 71P. by "Juan José González Suárez" jjgsgp

Messages

1 OBS-V: C/2015 V2 (Johnson)

Fri May 26, 2017 6:22 am (PDT) . Posted by:

scholten0dcs

2017 05 25.96 m = 7.3 (coma 18' DC=7) in 8x56B
Eerbeek (Netherlands)
Alex Scholten

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2 C/2015 ER61, C/2015 V2, 41P, 71P.

Fri May 26, 2017 1:45 pm (PDT) . Posted by:

"Juan José González Suárez" jjgsgp

C/2015 ER61 (PANSTARRS):
2017 May 24.12 UT: m1=7.9, Dia.=4', DC=5, 25x100B.
[ In 20 cm SCT(77x): tail 0.4-deg in PA 260 deg.
Beginning of astronomical twilight. Sidgwick method.
Tycho-2 comparison stars. Altitude: 9 deg. SQM : 20.8.
Mountain location, very clear sky.].

C/2015 V2 (Johnson ):
2017 May 24.01 UT: m1=7.1, Dia.=15', DC=4/,
Tail: 0.5 deg. in PA 320 deg, 12x45 monocular.
[ The comet shows a much wider coma diameter, providing
a brighter m1 estimate in comparison with my previous
May 3.12 observation; there is also a lesser influence of
the inner dust tail on the magnitude estimate. Sidgwick method.
Tycho-2 comparison stars. SQM : 21.5 at zenith.].

41P/Tuttle-Giacobini-Kresak:
2017 May 24.09 UT: m1=7.8, Dia.=9', DC=2, 8 cm R (20x).
[ Sidgwick method. Tycho-2 comparison stars. SQM : 21.5 at zenith.].

71P/Clark:
2017 May 24.02 UT: m1=11.2, Dia.=2.2', DC=3/, 20 cm SCT (100x).
[ Sidgwick method. Tycho-2 comparison stars. SQM : 21.2.].

( Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54' N, 5º 48' W ).

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

2015ER612017 05 24.12 S 7.9 TK 10.0B 25 4 5 ICQ
XX GON05

2015V2 2017 05 24.01 S 7.1 TK 4.5R 12 15 4/ 0.5 320 ICQ
XX GON05

41 2017 05 24.09 S 7.8 TK 8.0R 20 9 2 ICQ
XX GON05

71 2017 05 24.02 S 11.2 TK 20.3T10 100 2.2 3/ ICQ
XX GON05
---------------------------------------------------

J. J. Gonzalez

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

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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)

Profile: http://www.google.com/profiles/astrocomera

Lyra Main Website: http://www.lyra-astro.co.uk/

Charts-info Astrosite Groningen (May 26, 2017)

We have prepared the following new charts for our homepage:

41P/Tuttle-Giacobini-Kresak:- a 3.6x4.8 degrees chart for

the period 28 May - 2 June 2017

C/2015 V2 (Johnson):- two 6x8 degrees charts for the period

27 May - 7 June 2017

These new charts are now available in the charts section of

our  mainpage at: http://www.shopplaza.nl/astro

Reinder Bouma/Edwin van Dijk

--

Good Clear Skies

Astrocomet

Colin James Watling

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

Profile: http://www.google.com/profiles/astrocomera

Lyra Main Website: http://www.lyra-astro.co.uk/

[BAA-ebulletin 00976] NLC sighting

BAA electronic bulletin

NLC Alert

The first sighting of the season was made by Adrien Mauduit from Denmark last night

(25/ 26 May 2017). The AIMS satellite is unable to provide data for at least 2 weeks

so we are relying on ground based observers to report any sightings and hopefully

we will have some clear skies in the coming days.

Any reports please to - sandra-b@hotmail.co.uk<mailto:sandra-b@hotmail.co.uk>

Cheers

Sandra Brantingham

Aurora and NLC director

BAA-ebulletin mailing list visit:
http://lists.britastro.org/mailman/listinfo/baa-ebulletin
(c) 2017 British Astronomical Association http://www.britastro.org/

Good Clear Skies

Astrocomet

Colin James Watling

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

Profile: http://www.google.com/profiles/astrocomera

Lyra Main Website: http://www.lyra-astro.co.uk/

Friday 26 May 2017

Fwd: [CometObs] Digest Number 3264

Comet Observations Group

2 Messages

Digest #3264

Comet Observations 24th May 2017 by "Bomber2 Panther" outbackmanyep

Observations May 18 - May 22 by "Thomas Lehmann" ewelot

Messages

1 Comet Observations 24th May 2017

Thu May 25, 2017 3:35 am (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 24th May 2017

C/2015 V2 Johnson
2017 May 24.41 UT; m1= 8.3; Dia= 4.3'; DC= 5/6; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Dust tail visible 10' in length in P.A. 337° approximately. Low altitude = 16.6°. Transparent outer coma, opaque inner coma, small bright central condensation appears stellar sometimes. Inner coma does not enhance in Swan Band filter.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

2017 May 24.42 UT; m1= 7.8: ; Dia= 12'; DC= 4; 7x50 B [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, 8th magnitude background star in coma visible which interfered with observation. Slight hint of tail to the NW approximately. Low altitude = 18.4°. Easy to locate in a dark sky.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

71P/ Clark
2017 May 24.43 UT; m1= 12.5; Dia= 0.8'; DC= 6; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Does not enhance in Swan Band filter; Outer coma opaque brightening to an opaque inner coma and stellar central condensation. Slight hint of coma elongation to the NW approximately.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

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2 Observations May 18 - May 22

Thu May 25, 2017 1:19 pm (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

2015V2 2017 05 21.41 C 7.3 TK 10.6R 5a720 40 0.8 319 LEHaa 18.7 CCD/G remote (Mayhill), plasma tail 1.1 deg at pa=171, moon 26% dist 128deg
2015V2 2017 05 22.91 C 7.5 TK 07.5A 4B880 32 0.7 319 LEHaa 18.4 DSLR green, plasma tail 1.1 deg at pa=169

41 2017 05 18.28 C 8.1 TK 10.6R 5a600 32 LEHaa 18.7 CCD/G remote (Mayhill)
41 2017 05 22.99 C 8.2 TK 07.5A 4E280 32 LEHaa 18.8 DSLR green

71 2017 05 22.59 C 10.7 AQ 40.0L 4a360 10 0.23 288 LEHaa 19.9 CCD/G remote (SSO)

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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)

Profile: http://www.google.com/profiles/astrocomera

Lyra Main Website: http://www.lyra-astro.co.uk/

Wednesday 24 May 2017

Fwd: [CometObs] Digest Number 3263

Comet Observations Group

1 Message

Digest #3263

OBS-V : C/2015 V2 , 41P/ T-G-K by cometas71

Message

1 OBS-V : C/2015 V2 , 41P/ T-G-K

Tue May 23, 2017 12:39 am (PDT) . Posted by:

cometas71

Hi all ,

C/2015 V2 JOHNSON

2017 May. 22.87 UT: m1=9.3 , dia=5' , GC=9 , x47 , F/4,9 , L-30.5 cms........ J.P.Navarro Pina , Manuel Hernandez ( Puerto de la Cadena , Murcia , Spain ) [ comet very condensed and bright ]

41 P/ Tuttle-Giacobini-Kresak

2017 May. 22.89 UT: m1=11.7 , dia=3' , GC=1 , x94 , F/4,9 , L-30.5 cms........ J.P.Navarro Pina ( Puerto de la Cadena , Murcia , Spain ) [ comet poor very diffuse and difficult for observed ]

** Comet Section ( Astronomical Amateurs Association of Murcia )

http://www.aaamurcia.wordpress.com http://www.aaamurcia.wordpress.com

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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)

Profile: http://www.google.com/profiles/astrocomera

Lyra Main Website: http://www.lyra-astro.co.uk/

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Wednesday 31 May 2017

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