2 Messages
Digest #3547
Messages
Mon Jan 14, 2019 11:21 pm (PST) . Posted by:
"Bomber2 Panther" outbackmanyep
Comet Observations 14th January 2019
38P/ Stephan - Oterma
2019 Jan 14.64 UT; m1= 10.4; Dia= 5.0'; DC= 3/4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Coma faint and diffuse, opaque centre. Outer coma enhances in Swan Band filter, inner coma dims. Low altitude = 13.9°.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ
C/2016 N6 PanSTARRS
2019 Jan 14.65 UT; m1= 13.4; Dia= 0.7'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Difficult; Diffuse and small.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ
123P/ West - Hartley
2019 Jan 14.66 UT; m1= 13.4; Dia= 1.1'; DC= 5/6; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Diffuse outer coma, small opaque centre. Appears stellar in good seeing.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ
C/2016 M1 PanSTARRS
2019 Jan 14.68 UT; m1= 10.9; Dia= 4'; DC= 5; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Diffuse, opaque centre, well condensed. Background star in coma.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ
C/2018 Y1 Iwamoto
2019 Jan 14.68 UT; m1= 10.0; Dia= 6.4'; DC= 4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Enhances well in Swan Band filter, coma slightly elongated to the NE approximately. Opaque centre, fading to edges.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK
38 2019 01 14.64 xM 10.4 AQ 25.0L 5 39 5.0 3/ ICQ XX WYA
2016N6 2019 01 14.65 xS 13.4 AQ 25.0L 5 83 0.7 3 ICQ XX WYA
123 2019 01 14.66 xM 13.4 AQ 25.0L 5 83 1.1 5/ ICQ XX WYA
2016M1 2019 01 14.68 xM 10.9 AQ 25.0L 5 39 4.0 5 ICQ XX WYA
2018Y1 2019 01 14.68 xM 10.0 TK 25.0L 5 39 6.4 4 ICQ XX WYA
38P/ Stephan - Oterma
2019 Jan 14.64 UT; m1= 10.4; Dia= 5.0'; DC= 3/4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Coma faint and diffuse, opaque centre. Outer coma enhances in Swan Band filter, inner coma dims. Low altitude = 13.9°.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ
C/2016 N6 PanSTARRS
2019 Jan 14.65 UT; m1= 13.4; Dia= 0.7'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Difficult; Diffuse and small.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ
123P/ West - Hartley
2019 Jan 14.66 UT; m1= 13.4; Dia= 1.1'; DC= 5/6; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Diffuse outer coma, small opaque centre. Appears stellar in good seeing.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ
C/2016 M1 PanSTARRS
2019 Jan 14.68 UT; m1= 10.9; Dia= 4'; DC= 5; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Diffuse, opaque centre, well condensed. Background star in coma.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ
C/2018 Y1 Iwamoto
2019 Jan 14.68 UT; m1= 10.0; Dia= 6.4'; DC= 4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Enhances well in Swan Band filter, coma slightly elongated to the NE approximately. Opaque centre, fading to edges.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK
38 2019 01 14.64 xM 10.4 AQ 25.0L 5 39 5.0 3/ ICQ XX WYA
2016N6 2019 01 14.65 xS 13.4 AQ 25.0L 5 83 0.7 3 ICQ XX WYA
123 2019 01 14.66 xM 13.4 AQ 25.0L 5 83 1.1 5/ ICQ XX WYA
2016M1 2019 01 14.68 xM 10.9 AQ 25.0L 5 39 4.0 5 ICQ XX WYA
2018Y1 2019 01 14.68 xM 10.0 TK 25.0L 5 39 6.4 4 ICQ XX WYA
Tue Jan 15, 2019 7:49 am (PST) . Posted by:
"Juan Jose Gonzalez" jjgsgp
C/2016 R2 (PanSTARRS):
2019 Jan. 14.19 UT: m1=10.5, Dia.=6', DC=1/, 20 cm SCT (77x).
[ Faint tail difficult to separate from the coma.
The magnitude estimate is related to the observed width
of the coma and tail. Sidgwick method. Tycho-2 comparison stars.
SQM : 21.5.].
C/2018 Y1 (Iwamoto):
2019 Jan. 14.26 UT: m1=8.2, Dia.=10', DC=2, 25x100B.
[ In 25x100 B: from dark mountain skies the comet shows
a wide and diffuse outer coma. Altitude: 25 deg.
In 20 cm SCT (77x) : m1=8.7, Dia.=8', DC=3.
Sidgwick method. Tycho-2 comparison stars. SQM : 20.9.].
38P/Stephan-Oterma:
2019 Jan. 14.08 UT: m1=10.3, Dia.=4', DC=3/, 20 cm SCT (77x).
[ Sidgwick method. Tycho-2 comparison stars. SQM : 21.5.].
46P/Wirtanen:
2019 Jan. 14.10 UT: m1=5.6, Dia.=45', DC=3/, 12x45 monocular..
[ Several stars inside the coma, the brightest being mag. 7.0.
Sidgwick method. Tycho-2 comparison stars. SQM : 21.5.].
64P/Swift-Gehrels:
2019 Jan. 14.02 UT: m1=9.8, Dia.=6', DC=3, 20 cm SCT (77x).
[ Several stars inside the coma, the brightest being mag. 10.8.
Sidgwick method. Tycho-2 comparison stars. SQM : 21.2.].
123P/West-Hartley:
2019 Jan. 14.06 UT: m1=12.7, Dia.=1.1', DC=5, 20 cm SCT (100x).
[ In evolution after the recent minor outburst. Faint and diffuse
outer coma diameter: 3.5', providing m=11.2 (Tycho-2).
Condensed inner coma diameter: 1.1', providing m=12.7.
Near-stellar central condensation, m2=14.2:. Nearby field stars
checked in DSS. Limiting stellar magnitude fainter than 14.5.
Mountain location, very clear sky. APASS comparison stars.
Sidgwick method. SQM : 21.5.].
( Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W;
SQM 21.5 at zenith.).
----------------------------------------------------------
ICQ Format :
2016R2 2019 01 14.19 S 10.5 TK 20.3T10 77 6 1/ ICQ XX GON05
2018Y1 2019 01 14.25 S 8.7 TK 20.3T10 77 8 3 ICQ XX GON05
2018Y1 2019 01 14.26 S 8.2 TK 10.0B 25 10 2 ICQ XX GON05
38 2019 01 14.08 S 10.3 TK 20.3T10 77 4 3/ ICQ XX
GON05
46 2019 01 14.10 S 5.6 TK 4.5R 12 45 3/ ICQ XX GON05
64 2019 01 14.02 S 9.8 TK 20.3T10 77 6 3 ICQ XX GON05
123 2019 01 14.06 S 12.7 AQ 20.3T10 100 1.1 5 ICQ XX GON05
----------------------------------------------------------
J. J. Gonzalez
----------------------------------------------------------
2019 Jan. 14.19 UT: m1=10.5, Dia.=6', DC=1/, 20 cm SCT (77x).
[ Faint tail difficult to separate from the coma.
The magnitude estimate is related to the observed width
of the coma and tail. Sidgwick method. Tycho-2 comparison stars.
SQM : 21.5.].
C/2018 Y1 (Iwamoto):
2019 Jan. 14.26 UT: m1=8.2, Dia.=10', DC=2, 25x100B.
[ In 25x100 B: from dark mountain skies the comet shows
a wide and diffuse outer coma. Altitude: 25 deg.
In 20 cm SCT (77x) : m1=8.7, Dia.=8', DC=3.
Sidgwick method. Tycho-2 comparison stars. SQM : 20.9.].
38P/Stephan-Oterma:
2019 Jan. 14.08 UT: m1=10.3, Dia.=4', DC=3/, 20 cm SCT (77x).
[ Sidgwick method. Tycho-2 comparison stars. SQM : 21.5.].
46P/Wirtanen:
2019 Jan. 14.10 UT: m1=5.6, Dia.=45', DC=3/, 12x45 monocular..
[ Several stars inside the coma, the brightest being mag. 7.0.
Sidgwick method. Tycho-2 comparison stars. SQM : 21.5.].
64P/Swift-Gehrels:
2019 Jan. 14.02 UT: m1=9.8, Dia.=6', DC=3, 20 cm SCT (77x).
[ Several stars inside the coma, the brightest being mag. 10.8.
Sidgwick method. Tycho-2 comparison stars. SQM : 21.2.].
123P/West-Hartley:
2019 Jan. 14.06 UT: m1=12.7, Dia.=1.1', DC=5, 20 cm SCT (100x).
[ In evolution after the recent minor outburst. Faint and diffuse
outer coma diameter: 3.5', providing m=11.2 (Tycho-2).
Condensed inner coma diameter: 1.1', providing m=12.7.
Near-stellar central condensation, m2=14.2:. Nearby field stars
checked in DSS. Limiting stellar magnitude fainter than 14.5.
Mountain location, very clear sky. APASS comparison stars.
Sidgwick method. SQM : 21.5.].
( Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W;
SQM 21.5 at zenith.).
----------------------------------------------------------
ICQ Format :
2016R2 2019 01 14.19 S 10.5 TK 20.3T10 77 6 1/ ICQ XX GON05
2018Y1 2019 01 14.25 S 8.7 TK 20.3T10 77 8 3 ICQ XX GON05
2018Y1 2019 01 14.26 S 8.2 TK 10.0B 25 10 2 ICQ XX GON05
38 2019 01 14.08 S 10.3 TK 20.3T10 77 4 3/ ICQ XX
GON05
46 2019 01 14.10 S 5.6 TK 4.5R 12 45 3/ ICQ XX GON05
64 2019 01 14.02 S 9.8 TK 20.3T10 77 6 3 ICQ XX GON05
123 2019 01 14.06 S 12.7 AQ 20.3T10 100 1.1 5 ICQ XX GON05
----------------------------------------------------------
J. J. Gonzalez
----------------------------------------------------------
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 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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Lyra Main Website: http://www.lyra-astro.co.uk/
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