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Saturday, 16 December 2017

Fwd: [CometObs] Digest Number 3358

4 Messages

Digest #3358
1
Comet Observations 14th December 2017 by "Bomber2 Panther" outbackmanyep
2
Comet Observations 13th December 2017 by "Bomber2 Panther" outbackmanyep
3a
Comet observations. by neilnorman27
4
Observations Dec 07 - Dec 13 by "Thomas Lehmann" ewelot

Messages

Thu Dec 14, 2017 8:26 pm (PST) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 14th December 2017

C/2016 R2 PanSTARRS
2017 Dec 14.66 UT; m1= 10.8; Dia= 3.8'; DC= 3/4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Tail visible 5' in length in P.A. 100° approximately. coma does not enhance in Swan Band filter.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

C/2017 T1 Heinze
2017 Dec 14.67 UT; m1= 13.5; Dia= 1.3'; DC= 2; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, weakly condensed.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

62P/ Tsuchinshan
2017 Dec 14.68 UT; m1= 11.0; Dia= 4.3'; DC= 3; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Low altitude = 16.5°. Coma does not enhance in Swan Band filter, diffuse.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

Thu Dec 14, 2017 8:26 pm (PST) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 13th December 2017

174P/ Echeclus
2017 Dec 13.59 UT; m1= 14.0; Dia= 1'; DC= 5/6; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, uniform brightness across coma with faint stellar centre visible in good seeing.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

C/2016 R2 PanSTARRS
2017 Dec 13.60 UT; m1= 11.0; Dia= 3.2'; DC= 4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Tail visible 5.6' in length in P.A. 358° approximately, semi-transparent; Interference by star pair in coma. Coma dims in Swan band filter.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

C/2017 T1 Heinze
2017 Dec 13.61 UT; m1= 13.8; Dia= 1'; 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/2017 K6 Jacques
2017 Dec 13.65 UT; m1= 14.0; Dia= 0.8'; DC= 5/6; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma faintly stellar in periods of good seeing.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

A/3200 Phaethon
2017 Dec 13.57 UT; m1= 10.7; Dia= --; DC= 9; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Low altitude = 11.1°.
Comparison stars checked using APASS data in Guide 9.0; Method= I; Cat= AQ

Fri Dec 15, 2017 4:41 am (PST) . Posted by:

neilnorman27

Hello all.
Comet observations December 14th, 2017.

Comet C/2016 R2 (PanSTARRS)

m1= 9.5, Dia=4', DC=4. 20x80 binoculars.


Neil Norman, FRAS.

Ipswich,England.

Fri Dec 15, 2017 11:14 am (PST) . 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 12 08.49 C 14.8 AQ 40.0L 4a600 3.5 0.55 259 LEHaa 20.0 CCD/G remote (SSO)

2015V2 2017 12 07.44 C 12.4 AQ 10.6R 5a360 5 0.2 294 LEHaa 18.1 CCD/G remote (SSO)
2015V2 2017 12 11.44 C 12.6 AQ 10.6R 5a480 4.5 0.3 290 LEHaa 18.5 CCD/G remote (SSO)

2016R2 2017 12 13.35 C 10.1 AQ 10.6R 5a480 14 0.49 205 LEHaa 18.0 CCD/G remote (Mayhill), plasma tail 0.2 deg at pa=9

71 2017 12 13.44 C 14.7 AQ 51.0L 4a720 2.8 0.02 116 LEHaa 20.0 CCD/G remote (Mayhill), moon 20% dist 116deg

Phaethon2017 12 13.35 C 10.6 AQ 10.6R 5a150 1.3 LEHaa 17.6 CCD/G remote (Mayhill), starlike




--
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/
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Wednesday, 13 December 2017

Fwd: [CometObs] Digest Number 3356

1 Message

Digest #3356
1
174P in outburst, Phaethon. by "Juan Jose Gonzalez" jjgsgp

Message

Tue Dec 12, 2017 2:49 am (PST) . Posted by:

"Juan Jose Gonzalez" jjgsgp

174P/Echeclus:
2017 Dec. 11.83 UT: m1=13.6, Dia.= 0.3', DC=8, 20 cm SCT (222x).
[ In outburst. Field stars checked in DSS. Morris method.
APASS comparison stars. SQM : 21.3.].].

(3200) Phaethon:
2017 Dec. 11.91 UT: m1=11.0, Dia.= --, DC=9, 20 cm SCT (133x).
[ Stellar appearance. Motion obvious. In-focus method.
Tycho-2 comparison stars. SQM : 21.2.].

( Villacintor, Leon, Spain; Alt. 930 m, 42º 29' N, 5º 11' W;
Rural location, very clear sky. SQM 21.3 at zenith.).

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

ICQ Format :

174 2017 12 11.83 M 13.6 AQ 20.3T10 222 0.3 8 ICQ XX
GON05

3200 2017 12 11.91 I 11.0 TK 20.3T10 133 9 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/
Posted by at No comments:

Monday, 11 December 2017

Fwd: [CometObs] Digest Number 3355

2 Messages

Digest #3355
1
Comet Observations 7th December 2017 by "Bomber2 Panther" outbackmanyep
2
Observations Nov 28 - Dec 07 by "Thomas Lehmann" ewelot

Messages

Fri Dec 8, 2017 12:57 am (PST) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 7th December 2017

C/2015 V2 Johnson
2017 Dec 07.43 UT; m1= 13.5; Dia= 1.1'; DC= 5/6; 25cm L, f:5 (x166) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, with faint stellar central condensation in periods of good seeing.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ

C/2017 K6 Jacques
2017 Dec 07.44 UT; m1= 14.2; Dia= 0.9'; DC= 3; 25cm L, f:5 (x166) [Chris Wyatt, Walcha, NSW, Australia]
Coma very diffuse. Sometimes faintly stellar in periods of good seeing.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

C/2016 R2 PanSTARRS
2017 Dec 07.45 UT; m1= 11.2; Dia= 2'; DC= 3; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Does not enhance in Swan Band filter. Coma appears elongated to the West approximately.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

Fri Dec 8, 2017 2:13 pm (PST) . 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

2016R2 2017 11 28.38 C 11.0 AQ 10.6R 5a480 11 0.25 219 LEHaa 18.5 CCD/G remote (Mayhill), plasma tail 0.20 deg at pa=309

2017O1 2017 12 07.74 C 10.5 AQ 07.5A 4D154 17 LEHaa 18.5 DSLR green

24 2017 12 04.52 C 11.2 AQ 10.6R 5a480 7 LEHaa 17.4 CCD/G remote (Mayhill), moon 99% dist 113deg

62 2017 12 04.51 C 10.9 AQ 10.6R 5a360 7 LEHaa 17.2 CCD/G remote (Mayhill), moon 99% dist 93deg
62 2017 12 05.73 C 10.8 AQ 10.6R 5a360 10 LEHaa 17.8 CCD/G remote (SSO), moon 94% dist 76deg

71 2017 12 04.43 C 14.8 AQ 40.0L 4a600 2.1 LEHaa 19.0 CCD/G remote (SSO), moon 99% dist 122deg

Visit Your Group
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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/
Posted by at No comments:

Saturday, 9 December 2017

Fwd: [CometObs] Digest Number 3354

1 Message

Digest #3354

Message

Thu Dec 7, 2017 1:39 am (PST) . Posted by:

cometas71

Hi all , my visual observations tonight ....


3200 Phaeton


2017 Dec. 06.79 UT : m1=12.4 , Dia=-- , DC = 9 , x94 , F/5 , L-30.5 cms....... J.P.Navarro Pina ( Puerto de la Cadena , Murcia , Spain )


C/2017 O1 ASASSN


2017 Dec. 06.76 UT : m1=10.8 , Dia=1.5' , DC= 2 , x94 , F/5 , L-30.5 cms........ J.P.Navarro Pina ( Puerto de la Cadena , Murcia , Spain )


C/2016 R2 PANSTARRS


2017 Dec. 06.80 UT : m1=11.7 , Dia = 1.5' , DC= 3 , x250 , F/5 , L-30.5 cms........ J.P.Navarro Pina ( Puerto de la Cadena , Murcia , Spain )


Regards , J.P.Navarro Pina .
President of AAAM
Comet Section
http://aaamurcia.wordpress.com
* My experience as a comet observer is 32 years observing comets visually from Spain .....





--
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/
Posted by at No comments:

Thursday, 7 December 2017

Fwd: [CometObs] Digest Number 3353

1 Message

Digest #3353
1
C/2017 O1, Phaethon. by "Juan Jose Gonzalez" jjgsgp

Message

Wed Dec 6, 2017 3:37 am (PST) . Posted by:

"Juan Jose Gonzalez" jjgsgp

C/2017 O1 (ASASSN):
2017 Dec. 5.77 UT: m1=10.0, Dia.=4', DC=1/, 20 cm SCT (77x).
[ Sidgwick method. Tycho-2 comparison stars. SQM : 20.7.].

(3200) Phaethon:
2017 Dec. 5.80 UT: m1=12.4, Dia.= --, DC=9, 20 cm SCT (133x).
[ Stellar appearance. Motion checked during a 10-min period,
before moonrise. Field stars checked in DSS. In-focus method.
APASS comparison stars. SQM : 20.3.].

( Candanedo de Fenar, Leon, Spain; Alt. 1060 m, 42º 49' N, 5º 34' W;
Mountain location, clear sky. SQM 20.7 at zenith.).
----------------------------------------------------------

ICQ Format :

2017O1 2017 12 05.77 S 10.0 TK 20.3T10 77 4 1/ ICQ XX GON05

3200 2017 12 05.80 I 12.4 AQ 20.3T10 133 9 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/
Posted by at No comments:

[BAA-ebulletin 00995] A GREAT YEAR FOR THE GEMINIDS!

BAA electronic bulletin

A GREAT YEAR FOR THE GEMINIDS!

Active from December 6-17, but with a slow rise to maximum, the Geminids are
currently the richest of the regular annual meteor showers, producing an
abundance of bright meteors, with rates outstripping those of the August
Perseids for a 24-hour interval centred on their 14 December maximum - a
real treat for observers prepared to brave the early winter winds, cold and
damp.

The other good news is that Geminid maximum this year occurs just before new
Moon, so there will be no interference by moonlight, enabling many fainter
meteors to be seen in addition to the brightest members of the shower. This
year, the time of Geminid maximum is especially favourable for observers in
Europe, with peak activity expected at about 02h on Thursday, December 14,
when the ZHR may again reach 100 to 120 meteors per hour.

Observers should also note the most interesting project being organised by
Dr Tony Cook of the BAA Lunar Section to capture video of lunar impact
flashes as Geminid meteoroids strike the lunar surface on the eastern night
side. See the BAA website for further details.

In recent years, from the UK, the Geminids have shown typical peak observed
rates of 70-80 meteors per hour in good skies, so this is what one might
expect on the peak night of December 13/14 (Wednesday night/Thursday
morning). The maximum is quite broad, however, and respectable Geminid rates
may be expected throughout the nights of December 12/13, 13/14 and 14/15.
Past observations have shown that bright Geminids become more numerous some
hours after the rates have peaked, a consequence of particle-sorting in the
meteoroid stream.

The Geminid shower radiant (at RA 07h 33m, Dec +32o, just north of the
first magnitude star Castor) rises early in the evening and reaches a
respectable elevation above the horizon (> 40o) well before midnight, so
observers who are unable to stay up late can still contribute very useful
watches. However, the early morning hours of Thursday, 14th December are
likely to see the greatest Geminid activity, when the radiant is high in the
sky.

As with any meteor shower, when observing the Geminids it is best to look at
an altitude of 50o (about the same altitude as the Pole Star from southern
parts of the UK) and 40-50o to either side of shower radiant, rather than
looking directly at the radiant itself, although Geminid meteors may appear
in any part of the sky. December nights can be quite chilly, especially in
the early morning hours, so wrap up well with plenty of layers of warm, dry
clothing and make sure that you wear a hat, gloves, thick socks and sensible
waterproof footwear.

Geminid meteors enter the atmosphere at a relatively slow 35 kilometres per
second, and thanks to their robust (presumably more rocky than dusty) nature
tend to last longer than most in luminous flight. Unlike swift Perseid or
Orionid meteors, which last only a couple of tenths of a second, Geminids
may be visible for a second or longer, sometimes appearing to fragment into
a train of 'blobs'. Their low speed and abundance of bright events makes the
Geminids a prime target for imaging.

The Geminid shower has grown in intensity over the past 50 years as a result
of the stream orbit being dragged gradually outwards across that of the
Earth. A consequence is that we currently encounter the most
densely-populated parts of the stream. This happy situation is unfortunately
only temporary - in a few more decades, Geminid displays can be expected to
diminish in intensity. Here we have an excellent opportunity to follow, year
on year, the evolution of a meteoroid stream.

The BAA's visual meteor report forms, available as downloads in both pdf and
Excel formats, enable observers to record the details of each meteor seen.
These include: time of appearance (UT); apparent magnitude (brightness);
type (shower member, or random, 'background' sporadic); constellation in
which seen; presence and duration of any persistent train. Other notes may
mention flaring or fragmentation in flight, or marked colour. Watches should
ideally be of an hour's duration or longer (in multiples of 30 minutes).
Observers are reminded to carefully record the observing conditions and the
stellar limiting magnitude. Wrap up warmly and enjoy what should be a great
show!

By whatever means you observe the Geminids this year, please submit your
results to the BAA Meteor Section via meteor@britastro.org.

This e-bulletin issued by:

Dr John Mason

Director, BAA Meteor Section

email: docjohn@dircon.co.uk

7th December 2017


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/
Posted by at No comments:

Friday, 1 December 2017

Fwd: [CometObs] Digest Number 3351

1 Message

Digest #3351

Message

Thu Nov 30, 2017 4:44 pm (PST) . Posted by:


CometObs Group Policies

This group is for the posting of comet observations only.

Observations are formal estimates of a comet's magnitude,
apparent coma diameter, DC, or tail length.

In order to function as a clean repository of observations,
without the "noise" of intervening conversations, please direct
all discussion to our sister lists comets-ml or CometChasing.

Less formal comet observations are always welcome on the
CometChasing group.

Thanks,
Greg Crinklaw
CometObs moderator




--
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/
Posted by at No comments:
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