最新彗星目视观测数据

C/2011 L4 PANSTARRS 2013 Jan 26.28 UT: m= 7.5, Dia = 1',... DC=7/ 7cm R (28x)...Alexandre Amorim C/2012 F6 Lemmon 2013 Jan. 26.29 UT: m= 6.7, Dia= 6',... DC=5, ...10x50B...Alexandre Amorim(Florianopolis,Brazil)

C/2012 T5 Bressi
2013 Jan 29.42 UT; m1=10.4; Dia= 1.8’; DC= 5/6; 25cm L, f:5 (x39) [Chris Wyatt,
Walcha, NSW, Australia]
Small pseudo nucleus visible in good seeing, coma gradually brightens to centre
with weak centre. No tail, enhances inner coma with Swan Band filter. At x83 the
coma appears circular. Moonlight interference.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2012 F6 Lemmon
2013 Jan 29.43 UT; m1=6.2; Dia= 14’; DC= 5; 7x50 B [Chris Wyatt, Walcha, NSW,
Australia]
Coma large and diffuse, close to bright star, coma elongated to South. Moonlight
interference.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2011 L4 PANSTARRS
2013 Jan 29.72 UT; m1=6.7; Dia= 6’; DC= 3/4; 11x70 B [Chris Wyatt, Walcha, NSW,
Australia]
Moonlight affected obs, brightening twilight and observed through fog at times.
The coma appears circular with a hint of elongation to SW.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

L4起来了？
还有这个T5，也有小幅度爆发？

Comet C/2012 F6 Lemmon
Jan 29.45UT, m1 5.8, Dia 7.5', DC 4/.
11x70 mm
No tail visible
Coma circular
Not visible to the naked eye from my location.
The comet shoud be visible to the naked eye from a dark sky once the moon
gets out the way this weekend

C/2012 F6 Lemmon
2013 Jan 30.42 UT; m1=6.5; Dia= 9'; DC= 4; 7x50 B [Chris Wyatt, Walcha, NSW,
Australia]
Difficult due to close proximity of bright star, coma edges diffuse, the inner
half of the coma appears as a broad patch of light with slight gradation to
centre.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2012 T5 Bressi
2013 Jan 30.43 UT; m1=10.5; Dia= 2.5'; DC= 6; 25cm L, f:5 (x39) [Chris Wyatt,
Walcha, NSW, Australia]
Coma slightly elongated to WSW to ENE, no tail, tenuous outer coma weakly
brightening to a faint stellar pseudo nucleus.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2011 L4, 2013 Jan 31.83 UT; m1= 6.9; Dia= 3'; DC= 7; 10cm f4 refl
(20x)[Andrew Pearce, Nedlands, W. Australia].

C/2012 F6, 2013 Jan 31.54 UT; m1= 6.5; Dia= 6.5'; DC= 5; 10cm f4 refl
(20x)[Andrew Pearce, Nedlands, W. Australia].

C/2012 T5 Bressi
2013 Jan 31.42 UT; m1=10.5; Dia= 2.2’; DC= 4; 25cm L, f:5 (x39) [Chris Wyatt,
Walcha, NSW, Australia]
No tail, diffuse inner coma fading to a thin transparent outer coma, at x83 the
central condensation appears elongated to WSW.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2012 F6 Lemmon
2013 Jan 31.43 UT; m1=6.3; Dia= 10.4’; DC= 6; 7x50 B [Chris Wyatt, Walcha, NSW,
Australia]
Coma has faint edges using averted vision, bright inner coma with faint stellar
pseudo-nucleus. Not visible with the naked eye. Coma appears elongated NW.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2011 L4 PANSTARRS
2013 Jan 31.72 UT; m1=6.5; Dia= 5.2’; DC= 6; 11x70 B [Chris Wyatt, Walcha, NSW,
Australia]
Coma has small stellar pseudo-nucleus, inner coma elongated to the SW with tail
to the SW approximately 7’ in length but best visible using averted
vision.Moonlight.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

Hi All

C/2011 L4, 2013 Jan 31.83 UT; m1= 6.9; Dia= 3'; DC= 7; 10cm f4 refl
(20x)[Andrew Pearce, Nedlands, W. Australia].

C/2012 F6, 2013 Jan 31.54 UT; m1= 6.5; Dia= 6.5'; DC= 5; 10cm f4 refl
(20x)[Andrew Pearce, Nedlands, W. Australia].

Regards
Andrew Pearce
Western Australia

C/2012 F6 Lemmon
2013 Feb 01.43 UT; m1=6.2; Dia= 12'; DC= 6; 7x50 B [Chris Wyatt, Walcha, NSW,
Australia]
Coma elongated to WNW, faint tail extension to WNW 10 in length, small short
appendage apparent to the East using averted vision. Barely visible with naked
eye using averted vision in good seeing but too faint to get a reliable
observation.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2011 L4 PANSTARRS
2013 Feb 01.72 UT; m1=6.5; Dia= 6'; DC= 6; 11x70 B [Chris Wyatt, Walcha, NSW,
Australia]
Moonlight. Tail to WSW, 12 in length and curving slightly to NW, best visible
using averted vision.
Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK

C/2012 K5 LINEAR
2013 Feb 11.15 UT; m1=10.7, Dia= 2', DC=3...Tail= not visible, 40cm Dob f/4.5
(69x)...Will Godward
(Moonta, South Australia). Morris format, comparison stars checked using Guide
8.

C/2012 T5 BRESSI
2013 Feb 11.45 UT; m1=10.4, Dia= 2.3', DC=6...Tail= 6', 40cm Dob f/4.5 (69x),
Will Godward (Moonta, South Australia, Australia),Morris format, comparison
stars checked using Guide 8.

C/2012 F6 Lemmon
2013 Feb 11.25 UT: m1=5.0, Dia.=15', DC=7, Tail= 2.3 degrees ...25x100mm
Bino...(W.Godward, Moonta, South Australia, Australia) , naked eye observation
easy.

2012F6已经肉眼易见。

CCD测光结果。

C/2006 S3 (LONEOS)
2013 Jan. 09.34 UT: m1=13.9, Dia.= 0'.6, 30.5 cm schmidt-cassegrain
2013 Feb. 02.31 UT: m1=13.3, Dia.= 1'.2, 30.5 cm schmidt-cassegrain

C/2009 F4 (McNaught)
2012 Dec. 12.10 UT: m1=14.4, Dia.= 1'.1, 30.5 cm schmidt-cassegrain
2013 Jan. 05.19 UT: m1=14.4, Dia.= 1'.0, 30.5 cm schmidt-cassegrain
2013 Jan. 06.14 UT: m1=14.7, Dia.= 1'.0, 30.5 cm schmidt-cassegrain
2013 Jan. 16.11 UT: m1=14.6, Dia.= 1'.0, 30.5 cm schmidt-cassegrain
2013 Feb. 03.07 UT: m1=14.7, Dia.= 1'.0, 30.5 cm schmidt-cassegrain

C/2009 P1 (Garradd)
2012 Dec. 12.33 UT: m1=14.8, Dia.= 1'.3, 30.5 cm schmidt-cassegrain
2013 Jan. 09.28 UT: m1=15.4, Dia.= 1'.1, 30.5 cm schmidt-cassegrain
2013 Jan. 19.21 UT: m1=15.7, Dia.= 0'.8, 30.5 cm schmidt-cassegrain
2013 Feb. 02.22 UT: m1=15.2, Dia.= 0'.6, 30.5 cm schmidt-cassegrain

C/2011 A3 (Gibbs)
2012 Dec. 11.05 UT: m1=17.6, Dia.= 0'.6, 30.5 cm schmidt-cassegrain
2012 Dec. 13.08 UT: m1=17.4, Dia.= 0'.6, 30.5 cm schmidt-cassegrain
2012 Dec. 15.09 UT: m1=17.7, Dia.= 0'.5, 30.5 cm schmidt-cassegrain

C/2011 L4 (PanSTARRS)
2013 Jan. 23.34 UT: m1= 7.1, Dia.= 2'.6, 30.5 cm schmidt-cassegrain
2013 Jan. 24.35 UT: m1= 7.2, Dia.= 2'.0, 30.5 cm schmidt-cassegrain
2013 Feb. 02.34 UT: m1= 6.3, Dia.= 3'.4, 30.5 cm schmidt-cassegrain

C/2011 O1 (LINEAR)
2013 Jan. 16.14 UT: m1=16.1, Dia.= 0'.6, 30.5 cm schmidt-cassegrain

C/2011 R1 (McNaught)
2012 Dec. 23.34 UT: m1=12.7, Dia.= 0'.6, 30.5 cm schmidt-cassegrain
2013 Jan. 09.32 UT: m1=13.7, Dia.= 0'.5, 30.5 cm schmidt-cassegrain
2013 Feb. 02.27 UT: m1=13.2, Dia.= 0'.8, 30.5 cm schmidt-cassegrain

C/2011 UF 305 (LINEAR)
2013 Jan. 08.13 UT: m1=15.5, Dia.= 0'.7, 30.5 cm schmidt-cassegrain
2013 Jan. 09.22 UT: m1=15.2, Dia.= 0'.8, 30.5 cm schmidt-cassegrain

C/2012 F6 (Lemmon)
2012 Dec. 13.32 UT: m1=12.5, Dia.= 2'.2, 30.5 cm schmidt-cassegrain
2012 Dec. 14.27 UT: m1=12.5, Dia.= 2'.1, 30.5 cm schmidt-cassegrain
2012 Dec. 24.22 UT: m1=11.0, Dia.= 2'.9, 30.5 cm schmidt-cassegrain
2013 Jan. 09.30 UT: m1=10.7, Dia.= 2'.0, 30.5 cm schmidt-cassegrain
2013 Feb. 02.25 UT: m1= 7.8, Dia.= 4'.9, 30.5 cm schmidt-cassegrain
2013 Feb. 03.26 UT: m1= 7.7, Dia.= 6'.5, 30.5 cm schmidt-cassegrain

C/2012 J1 (Catalina)
2012 Dec. 04.05 UT: m1=13.7, Dia.= 0'.8, 30.5 cm schmidt-cassegrain
2013 Jan. 03.08 UT: m1=13.8, Dia.= 0'.8, 30.5 cm schmidt-cassegrain
2013 Jan. 06.08 UT: m1=13.9, Dia.= 0'.9, 30.5 cm schmidt-cassegrain

C/2012 K5 (LINEAR)
2013 Jan. 07.07 UT: m1=10.7, Dia.= 2'.0, 30.5 cm schmidt-cassegrain
2013 Jan. 09.06 UT: m1=10.8, Dia.= 2'.8, 30.5 cm schmidt-cassegrain
2013 Jan. 17.07 UT: m1=12.2, Dia.= 1'.8, 30.5 cm schmidt-cassegrain
2013 Jan. 19.04 UT: m1=12.1, Dia.= 1'.9, 30.5 cm schmidt-cassegrain
2013 Feb. 02.13 UT: m1=14.2, Dia.= 1'.1, 30.5 cm schmidt-cassegrain

C/2012 S1 (ISON)
2012 Dec. 21.30 UT: m1=16.3, Dia.= 0'.4, 30.5 cm schmidt-cassegrain
2012 Dec. 22.24 UT: m1=16.2, Dia.= 0'.4, 30.5 cm schmidt-cassegrain
2012 Dec. 23.25 UT: m1=16.6, Dia.= 0'.4, 30.5 cm schmidt-cassegrain
2012 Dec. 26.23 UT: m1=15.8, Dia.= 0'.4, 30.5 cm schmidt-cassegrain
2013 Jan. 03.30 UT: m1=15.8, Dia.= 0'.4, 30.5 cm schmidt-cassegrain
2013 Jan. 10.25 UT: m1=15.9, Dia.= 0'.4, 30.5 cm schmidt-cassegrain
2013 Jan. 16.27 UT: m1=16.3, Dia.= 0'.4, 30.5 cm schmidt-cassegrain

C/2012 T5 (Bressi)
2012 Dec. 04.09 UT: m1=17.5, Dia.= 0'.5, 30.5 cm schmidt-cassegrain
2013 Jan. 06.11 UT: m1=17.2, Dia.= 0'.4, 30.5 cm schmidt-cassegrain
2013 Jan. 29.04 UT: m1=12.6, Dia.= 0'.8, 30.5 cm schmidt-cassegrain
2013 Feb. 03.04 UT: m1=11.4, Dia.= 1'.6, 30.5 cm schmidt-cassegrain

78P/Gehrels
2012 Dec. 13.30 UT: m1=17.3, Dia.= 0'.6, 30.5 cm schmidt-cassegrain

C/2011 L4 Feb 5.70 UT, m1 6.1, Dia 5.5', DC 6' C/2012 T5 Bressi Feb 05.44 UT; m1=9.7; Dia= 2’; DC= 5/6 C/2012 F6 Lemmon m1=6.2; Dia= 15’; DC= 5 Feb 05.47 UT; m1=5.9; Dia= 22’; DC= 1/2

C/2012 F6 Lemmon
2013 Feb 8.74 UT
Canon 60Da, 5x2 minute stack. 300mm zoom lens, cropped. Visual estimate 5.5
The ion tail is at least 3 degrees long in PA 165.

C/2011 L4 PANSTARRS
2013 Feb 8.75 UT
Canon 60Da, 5x2 minute stack. 300mm zoom lens, cropped. Visual estimate 5.9.
The ion tail is nearly 1 degree in PA 210 whilst the leading edge of the
dust tail is 30' in PA 250.
Notice the broad dust fan.

Michael

Comet C/2011 L4 Panstarrs
Feb 11.75UT, m1 5.2, Dia 4.0', DC 8/
Very condensed starlike coma.
More diffused towards the edges.
Broad tail 0.45 deg in length in PA 240
11x70mm Binos
Approx 10 degrees above the horizon, and the start of twilight, when observed

Comet C/2012 F6 Lemmon
Feb 11.75UT, m1 5.5, Dia 15', DC 5/
11x70mm Binos
I could almost fit 47 Tuc, and the comet in the same FOV.

Both comet not visible to the naked eye from my location.