Fwd: [CometObs] Digest Number 3320

Comet Observations Group

1 Message

Digest #3320

1

C/2017 O1. by "Juan Jose Gonzalez" jjgsgp

Message

1

C/2017 O1.

Mon Sep 25, 2017 2:29 am (PDT) . Posted by:

"Juan Jose Gonzalez" jjgsgp

C/2017 O1 (ASASSN):
2017 Sep. 25.01 UT: m1=8.3, Dia.=10', DC=3, 10x50B.
[ In 25x100B : m1=8.5, Dia.=9', DC=2/.
The visual lightcurve seems to show a slowdown in the recent weeks.
Sidgwick method. Tycho-2 comparison stars. SQM : 21.2.].

( Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54' N, 5º 48' W.
Mountain location, very clear sky. SQM 21.3 at zenith.).

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

2017O1 2017 09 25.00 S 8.5 TK 10.0B 25 9 2/ ICQ XX GON05

2017O1 2017 09 25.01 S 8.3 TK 5.0B 10 10 3 ICQ XX GON05

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

J. J. Gonzalez

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

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Fwd: [CometObs] Digest Number 3319

Comet Observations Group

3 Messages

Digest #3319

1.1

OBS-V by "Castell.Nova" szasa0

2

Comet Observations 21st September 2017 by "Bomber2 Panther" outbackmanyep

3

Comet Observations 22nd September 2017 by "Bomber2 Panther" outbackmanyep

Messages

1.1

OBS-V

Sat Sep 23, 2017 11:44 am (PDT) . Posted by:

"Castell.Nova" szasa0

Hello to the Group,

some visual observation from last night. Unfortunately before midnight some local clouds appeared and ceased observation.

29P/Schwassmann-Wachmann
2017 Sep 22.86 UT: m1=13.7, Dia.=0.9', DC=1, 60 cm reflector (305x)
Very diffuse comet.

C/2015 O1 (PanSTARRS)
2017 Sep 22.79 UT: m1=14.2, Dia.=0.3', DC=5, 60 cm reflector (244x)

C/2016 M1 (PanSTARRS)

2017 Sep 22.82 UT: m1=14.5, Dia.=0.5', DC=5, 60 cm reflector (305x)

C/2016 N4 (MASTER)
2017 Sep 22.84 UT: m1=15.7, Dia.=0.4', DC=2, 60 cm reflector (305x)
A 16.5 mag starlike nucleus is seen. Motion was checked during 20 minutes.

C/2016 N6 (PanSTARRS)

2017 Sep 22.80 UT: m1=13.7, Dia.=0.7', DC=3, 60 cm reflector (244x)

Sandor Szabo

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2

Comet Observations 21st September 2017

Sun Sep 24, 2017 3:53 am (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

240P/ NEAT
2017 Sep 21.72 UT; m1= 14.2; Dia= 0.7'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Difficult, visible in periods of good seeing. Diffuse coma.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

C/2017 O1 ASASSN
2017 Sep 21.73 UT; m1= 9.5; Dia= 11.4'; DC= 3/4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Outer coma semi-transparent, inner coma opaque and moderately condensed.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2016 R2 PanSTARRS
2017 Sep 21.75 UT; m1= 13.8; Dia= 0.9'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Outer coma diffuse, slight brightening to centre. Does not enhance in Swan Band filter.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

217P/ LINEAR
2017 Sep 21.76 UT; m1= 13.9; Dia= 0.8'; DC= 3; 25cm L, f:5 (x166) [Chris Wyatt, Walcha, NSW, Australia]
Visible in periods of good seeing, difficult, close to stars.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

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3

Comet Observations 22nd September 2017

Sun Sep 24, 2017 3:55 am (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 22nd September 2017

71P/ Clark
2017 Sep 22.45 UT; m1= 12.2; Dia= 1.9'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Busy star field, difficult.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

29P/ Schwassmann-Wachmann 1
2017 Sep 22.46 UT; m1= 11.9; Dia= 3'; DC= 2/3; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, weakly condensed opaque centre.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

C/2015 V2 Johnson
2017 Sep 22.47 UT; m1= 10.9; Dia= 3.9'; DC= 2; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, slight interference by background star in coma.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

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Fwd: [CometObs] Digest Number 3315

Comet Observations Group

1 Message

Digest #3315

1

Comet Observations 15th September 2017 by "Bomber2 Panther" outbackmanyep

Message

1

Comet Observations 15th September 2017

Sun Sep 17, 2017 8:56 pm (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 15th September 2017

C/2015 V2 Johnson
2017 Sep 15.41 UT; m1= 11.0: ; Dia= 2.4'; DC= 3; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Magnitude uncertain; close to bright star pairing, difficult to separate from stars. Coma diffuse with opaque centre.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

71P/ Clark
2017 Sep 15.42 UT; m1= 12.5; Dia= 1.2'; DC= 2/3; 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

29P/ Schwassmann-Wachmann 1
2017 Sep 15.44 UT; m1= 11.7; Dia= 2.5'; DC= 3; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Outer coma diffuse, opaque centre. Does not enhance in Swan Band filter.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

240P/ NEAT
2017 Sep 15.46 UT; m1= 14.0; Dia= 1'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma very diffuse, slight brightening to centre.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

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Fwd: [CometObs] Digest Number 3313

Comet Observations Group

1 Message

Digest #3313

1

OBS-V : 29P/ SW-1 by cometas71

Message

1

OBS-V : 29P/ SW-1

Thu Sep 14, 2017 5:29 am (PDT) . Posted by:

cometas71

Hi all :

2017 Sept. 13.89 UT : m1=12.5 (S) , dia=2.0' , DC=6 , x97 , L-30.5 cms. F/5 ........ J.P.Navarro Pina ( Campos del Rio , Murcia , Spain )




Regards , J.P.Navarro .

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Fwd: [CometObs] Digest Number 3314

Comet Observations Group

1 Message

Digest #3314

1

29P, C/2017 O1. by "Juan Jose Gonzalez" jjgsgp

Message

1

29P, C/2017 O1.

Sat Sep 16, 2017 4:27 am (PDT) . Posted by:

"Juan Jose Gonzalez" jjgsgp

C/2017 O1 (ASASSN):
2017 Sep. 16.01 UT: m1=8.2, Dia.=9', DC=3, 10x50B.
[ In 25x100B : m1=8.3, Dia.=9', DC=2/.
Sidgwick method. Tycho-2 comparison stars. SQM : 21.3.].

29P/Schwassmann-Wachmann:
2017 Sep. 15.87 UT: m1=11.5, Dia.=2.0', DC=4, 20 cm SCT (100x).
[ In evolution after the recent outbursts. Starlike central
condensation, m2=14.0: (AQ). Brighter inner coma diameter : 2.0',
providing m=11.5 (AQ). Faint and diffuse outer coma diameter : 3'.5,
providing m=10.3: (TK), remnant of previous outbursts. Sidgwick method.
Field stars checked in DSS. Altitude: 32 deg. SQM : 21.1.].

( Cruce de Aralla - Embalse de Barrios de Luna, Leon, Spain;
Alt. 1110 m, 42º 54' N, 5º 52' W.
Mountain location, very clear sky. SQM 21.4 at zenith.).

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

2017O1 2017 09 16.00 S 8.3 TK 10.0B 25 9 2/ ICQ XX GON05

2017O1 2017 09 16.01 S 8.2 TK 5.0B 10 9 3 ICQ XX GON05

29 2017 09 15.87 S 11.5 AQ 20.3T10 100 2.0 4 ICQ XX GON05

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

J. J. Gonzalez

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

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--

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)

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[BAA-ebulletin 00987] BAA DVD/Blu-ray record of the 2017 August 21 total solar eclipse

BAA electronic bulletin

Following the August 21 total solar eclipse in the US the BAA has
decided to produce a DVD/blu-ray containing video and stills of the
event. If you have any material that you would like to be considered
please send it to:

solareclipse@britastro.org

This mailbox can accept files of up to 20MB. If your material is
larger than this (e.g. HD video) please contact me via the above
address for details of how it can be submitted.

We want this disc to be a full record of the event so we are happy to
consider any type of material associated with the eclipse.

The closing date for submission is Friday, October 20th and we will
announce the availability of the discs via the BAA website when they
are ready. Previous BAA discs covering recent eclipses are available
from the BAA sales page here:

https://www.britastro.org/shop_catalog/127

Nick James.

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

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Good Clear Skies
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Astrocomet
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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/

[BAA-ebulletin 00985] Rare occultation of a 5th magnitude star by an asteroid visible from UK on Sept 9/10

BAA electronic bulletin

On the night of Saturday, September 9 at 23:44 UT (00:44 BST on
September 10) the asteroid (6925) Susumu (mag 17.8V) is predicted to
occult star sigma(1) Tauri (HIP 21673, mag 5.1V). A detailed account
by Alex Pratt of this very favourable event is available at:

https://www.britastro.org/node/11043

Given that the star is bright enough to be visible to the unaided eye,
and that it is a spectroscopic binary star, many observers may be
treated to a 'double' shadow cast by the star system transecting the
mid-UK region. The maximum duration of an occultation from any one
location is about 2 seconds when the star disappears from view. Be
watchful however for secondary events, either arising from the binary
nature of the star or the distinct possibility that the asteroid is a
binary system too. Although the marked uncertainty in the exact
location of the track is about 100 km, given duplicity in the
star/asteroid, observers several hundred km either side of the
centre-line should watch for a positive occultation event. Likewise,
start observing a few minutes ahead of the due time and continue a few
minutes after too in order to capture unexpected phenomena. Note that
the star is in Taurus and will be fairly low towards your eastern
horizon.

Do please make every effort, weather permitting, to observe this
especially rare event. If you are able to use a video camera hooked up
to some form of optical aid then do consider using it, as this type of
permanent record is invaluable observation-wise. Visual observers
should also attempt to time the event, both the duration of the
disappearance and the absolute time if at all possible. An easy way to
add time marks to your video record (say after the start and before
the end)is to momentarily shine a flashlight or similar near the
entrance of your optics, synchronising the flash as accurately as
possible to some reliable time signal.

Good luck everyone!

Richard Miles
Director, Asteroids and Remote Planets Section
2017 September 07 09:24 UT

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
--
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/

[BAA-ebulletin 00984] Extremely High Solar Activity

BAA electronic bulletin

The below bulletin has just been received. Two X class flares took
place today with the potential for more as Active Region 2673
approaches the western solar limb. Observations and images are
requested. Please send to solar@britastro.org

It is likely that Coronal Mass Ejections accompanied today's two major
flare events and the possibility of aurora over he weekend is also
likely. Any aurora reports to sandra-b@hotmail.co.uk

"Solar activity is extreme. Region NOAA 12673 produced two X-class flares
since the last report: an X2.2 at 08:57 UT and an X9.3 at 11:53 UT today.
The region remains beta-gamma-delta class, with a large field gradient
and shear between the positive and negative delta spots.
It has also produced several M-class events.
Further X-class activity is likely.
The potential for very large flare events still exists.
NOAA 12673, S09 W40 (X= 607,Y=-239). Beta-gamma-delta region.
Position as of September 6, 2017 at 16:00 UT."

Lyn Smith

Director

BAA Solar Section

Sent from Outlook<http://aka.ms/weboutlook>

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

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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
--
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/

[BAA-ebulletin 00983] High Solar Activity - observations requested

BAA electronic bulletin


Solar Cycle 24 is giving a late show with a sudden outburst of
activity in white light and H-alpha. Active Regions 2673 and 2674 are
both impressive on the disk with AR2673 rapidly developing and
releasing several solar flares including an M1.5 flare today between
1511 and 1533 UT.

Observations are requested during the next few days including images
and drawings.

As always take care when observing the Sun and only use the
appropriate equipment. Never look at the Sun with the naked eye or
through an unfiltered telescope.


"Solar activity is high. Region NOAA 12673 produced an M1.2 flare at 05:36 UT
today along with several C-class events. This region is rapidly growing
and is now beta-gamma-delta class. Further M-class evnets are likely
and an X-class flare is possible. NOAA 12673, S10 W11 (X= 180,Y= 281).
Position as of September 4, 2017 at 15:30 UT."


Lyn Smith

Director

BAA Solar Section


Sent from Outlook<http://aka.ms/weboutlook>

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
--
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/

[BAA-ebulletin 00982] Historical Section Meeting - Saturday November 25th 2017, Birmingham

BAA electronic bulletin

Historical Section Meeting - Saturday November 25th 2017

The next meeting of the BAA Historical Section is in Birmingham on
November 25th, with a theme of "Nineteenth Century Astronomy"

Date: Saturday November 25th 2017
Time: 10:00 - 17:00 (doors open at 09:30)
Venue: The Birmingham and Midland Institute, Margaret Street,
Birmingham B3 3BS
Cost: 5 pounds for BAA members, 10 pounds for non-members

You can book in advance or pay at the door; advance booking is preferred.
Please use the form at www.britastro.org/historical2017 or book
through the BAA shop.

Timetable:

09:30 Doors open

09:30 – 10:00 Refreshments

10:00 – 10:10 Introduction and Welcome

10:10 – 11:05 Mark Edwards
'Astronomy in JMW Turner's Paintings'

11:55 – 12:00 Kevin Kilburn
'The Lost Gardens of Fireside'

12:00 – 13:30 Lunch Break
(lunch is not included in the price but there is a cafe in the BMI,
and lots of cafes and pubs nearby)

13:30 – 13:35 Welcome Back

13:35 - 14:30 Kenelm England
'Berkshire Astronomers'

14:30 - 15:25 Dr. Louise Devoy
'Observatory Life - putting the stories of the
Maskelyne and Airy families back into Flamsteed House, Greenwich'

15:25 – 15:50 Refreshments

15:50 – 16:50 Dr. Allan Chapman
'Sir John Herschel: Astronomer on Two Continents'

16:50 - 17:00 Concluding Remarks

17:00 Meeting Closes


The Birmingham and Midland Institute is the home of the Society for
the History of Astronomy's Sir Robert Stawell Ball library.


The SHA have generously agreed to open the library to us, and will be
holding a sale of surplus books.


There is no parking at the BMI, except for street parking (two hours
max, no return for one hour), but plenty of car parks nearby.


Birmingham New Street Station and Snow Hill Station are ten minutes walk away.


More details on our web site - www.britastro.org/history


Historical Section Director: Mike Frost frostma@aol.com
Deputy Director: Lee Macdonald leetmacdonald@gmail.com


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
--
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/