Re: Bursting Komet C/2000 WM1

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Geschrieben von Danan am 31. Januar 2002 00:50:04:

Als Antwort auf: Re: Bursting Komet C/2000 WM1 geschrieben von IT Oma am 30. Januar 2002 21:37:22:

>>Bei dem Komet C 2000 WM 1 gab es in Sonnennähe einen überraschenden
>>Helligkeitsausbruch hervorgerufen durch Vorgänge im Kometeneiskern.
>>Die Magnitude stieg von 6 auf 2-3. Weiss jemand etwas Näheres z.B. Skywatcher Mischel?
>
>Hallo Astro,
>kennst Du diese Website? http://encke.jpl.nasa.gov/RecentObs.html#00WM1 mit Beobachtungen von heute.
>Herzliche Grüße
>IT Oma

Hups ich denk das übersetz ich mal

Betrifft Komet
C/2000 WM1 (LINEAR)
2002 Jan. 30.78 UT: m1=2.9, DC=8/ Ein bloße Augen beobachtung eines Michael Mattazizio aus Wallaroo, Süd Australien. Als Orientierungshilfe die Sterne des großen Teekessels? warscheinlich großer Bär.
Die 2 hell leuchtenden Strahlen die gestern beobachtet wurden haben sich nun zu einer Klassischen Parabolischen From verändert wie sie uns aus vergangenen Zeichnungen bekannt ist. Der Schweif ist größer geworden und reicht nun 2 Grade in die Länge. Mit einem 28 cm telescop mit 84 x vergrößerung sind die beiden Strahlen durch eine dunkle Linie getrennt.

Der Komet hat sich wohl in zwei Teile gespalten?


*2002 Jan. 30.78 UT: m1=2.9, DC=8/...Naked Eye...Michael Mattiazzo (Wallaroo,South Australia) [Out-out method, transparency good, using the stars in the handle of the teapot for comparison VT mags Sig Sgr(2.04), Zet Sgr(2.62), Phi sgr(3.15), Tau Sgr(3.45). In 25x100mm binoculars, coma diameter=2.5' and the 2 bright jets observed yesterday morning have now developed into the classic parabola shape seen in drawings of the past. The tail is more prominent now arching over 2 degrees in length. In a 28cm telescope at 84x, the jets are separated by a "dark lane" . Moonlight interference 95%. Magnitude not corrected for extinction. Altitude of comet and comparison stars respectively are 13,10,11,13 and 9 degrees.]

Ein weiterer Komet ist im august entdeckt worden, der voraussichtlich in 2004 zu sehen sein wird, warscheinlich sogar mit bloßem Auge.

New Comet C/2001 Q4 (NEAT) may become a binocular object (or brighter) in 2004
IAU Circular 7711 (September 10, 2001) announced that a comet discovered by the NEAT automated search program at Palomar on August 24, may become an easy binocular (or perhaps even a naked-eye) object in May-June 2004. This is based on an improved orbit that places the perihelion distance at 1.0 AU in the last part of May 2004. It should be noted that the date of perihelion is still uncertain by several weeks. The comet is currently about 10 AU from the Sun and m1~17th magnitude. More on this as details become available.


C/2000 WM1 (LINEAR)
Last Updated: 30 January 2002
Reported observations:

2002 Jan 04.49 UT: m1=5.4, Dia=8', DC=7, narrow ion(?) tail 60' long to PA 70, plus a faint "fan" tail 25'-35' long between PAs 70 to 120. 12x50B...Fraser Farrell (McLaren Vale, South Australia) [Using 430mm reflector at 100x: Dominant colour of this comet is pale yellow, fading out to dull grey. Only a hint of cyan green is seen in the immediate vicinity of the nucleus, and in the root of the ion(?) tail described above. Thera also seems to be a narrow white arc ~2" radius over the sunward side of the <2" diameter nucleus. A shell of recently ejected material??]
2002 Jan. 04.54 UT: m1=6.1, Dia.=4', DC=7, Tail >1 deg in PA 110...7x50B...Michael Mattiazzo (Wallaroo,South Australia) [Out-out method, transparency good]
2002 Jan. 4.7326UT: m1=6.0, Dia.=7', DC=7, Tail: 2.5 degrees in PA 100 degrees...7x50...Mike Begbie (Harare, Zimbabwe) [A spectacular sight through the 15 cm Reflector f/7 at 50x. The coma consists of a dense, bright central condensation with a sun-ward plume of material centred on PA 260 degrees. This then "flows" back into the first part of a bright (plasma?) tail that fades out slowly in PA 102 degrees but was traced to 40' from the coma. A broad, faint (dust?) component appears as a fan centred on PA 050 degrees traceable to approximately 8'.]
2002 Jan. 04.97 UT: m1=6.1, Dia.=7', DC=6, Tail 0.17 deg in PA 105...12x50B...Raquel Shida (Sao Paulo, Brazil) [reference stars: HIP 108268 and HIP 106978. Through the 203mmSCT (80x) a linear and faint tail (7' extension) was visible in PA 105]
2002 Jan 6.53UT: m1=6.1, Dia=5.5', DC=7...20x80B...Andrew Pearce (Nedlands, Western Australia)[Faint tail visible 1.1 deg long in PA 112 deg. Estimate made in 8x40 binoculars: m1=6.0, Dia=7.5', DC=7/, appeared very condensed in small binoculars. First 15' of tail is of high surface brightness.]
2002 Jan. 6.7465UT: m1=6.3, Dia.=6', DC=7 Tail: 2.1 degrees in PA 110 degrees...7x50 B...Mike Begbie (Harare, Zimbabwe) [ Slightly hazy conditions.]
2002 Jan. 7.02 UT: m1=6.2, Dia.=4', DC=6, ... 7x50 B ... Luis Alberto Mansilla, (Observatorio Canopus, ROSARIO, Argentina) [Morris Method]
2002 Jan. 07.97 UT: m1= 6.1, Dia=4', DC=7/,tail=0.25 deg in PA110 ...20x80B...Alexandre Amorim (Florianopolis, Brazil)[central condensation: mag. 8.7]
2002 Jan. 08.97 UT: m1= 6.2, Dia=4', DC=7,tail=0.2 deg in PA110 ...20x80B...Alexandre Amorim (Florianopolis, Brazil)[central condensation: mag. 8.7]
2002 Jan. 9.03 UT: m1=6.0, Dia.=4', DC=7, ... 7x50B ... Luis Alberto Mansilla (Observatorio Canopus, ROSARIO, Argentina) [Morris Method]
2002 Jan. 09.51 UT: m1=6.1, Dia.=3', DC=7, Tail >1 deg in PA 129...7x50B...Michael Mattiazzo (Wallaroo,South Australia) [Out-out method, transparency good. In 25x100mm binoculars, the long & thin ion tail has intensified and is tracable for >1.5 degrees]
2002 Jan. 11.03 UT: m1=5.9, Dia.=4', DC=7, ... 7x50B ... Luis Alberto Mansilla (Observatorio Canopus, ROSARIO, Argentina) [Morris Method]
2002 Jan. 12.40 UT: m1=6.5, Dia.=6', DC=6, Tail=1.2 deg. 11x70B. Paul Kemp (Napier, New Zealand). [Out-Out method, No Moon. Excellent views also through 13.1 inch Dobsonian. Observation conducted at Stardate, New Zealand's Largest Annual Star Party.]
2002 Jan 12.53UT: m1=6.0, Dia=6', DC=7...8x40B...Andrew Pearce (Nedlands, Western Australia)
2002 Jan. 12.7396UT: m1=6.0, Dia.=5', DC=6...7x50 B...Mike Begbie (Harare, Zimbabwe) [ A difficult observation! Comet seen for about 5 minutes between clouds and with some haze. Coma very close to Mu Indi making magnitude estimate difficult. No tail noted in the limited time.]
2002 Jan 13.42 UT: m1=6.3, Dia=7', DC=6, Tail=1 deg in PA 130...11x70B... Paul Kemp (Napier, New Zealand) [Out-Out Method. No Moon. Tycho 2 Comparison stars TYC8792-1421-1 mag 6.28 & TYC 8793-360-1 mag 6.70. New Pro-Optic 11x70 Binoculars are superb for comet observations.]
2002 Jan 14.46 UT: m1=6.3, Dia=7', DC=6, Tail=1 deg in PA 130...11x70B...Paul Kemp (Taupo, New Zealand) [Out-Out Method. No Moon. Tycho 2 Comparison stars TYC 8 792-1421-1 mag 6.28 & TYC 8793-360-1 mag 6.70. No change from last nights observation]
2002 Jan. 15.08 UT: m1=6.1 Dia=12.0', DC=6, tail: 1.2 deg. ... 14x100 B...Adrian Paulo Arquiola (FUNES - ARGENTINA)
2002 Jan. 15.97 UT: m1= 6.3, Dia=4', DC=6/,tail=0.16 deg in PA140 ...20x80B...Alexandre Amorim (Florianopolis, Brazil)
2002 Jan. 17.96 UT: m1= 6.2, Dia=5',DC=7, ...7x50B...Alexandre Amorim(Florianopolis,Brazil)[tail: 0.1 deg in PA 140, using 20x80B]
2002 Jan 20.53UT: m1=6.3, Dia=4', DC=6...20x80B...Andrew Pearce (Nedlands, Western Australia)[Low elevation and observation made in twilight]
2002 Jan. 20.96 UT: m1= 6.1:, Dia=2',DC=8, ...20x80B...Alexandre Amorim(Florianopolis,Brazil)[evening sky]
2002 Jan. 21.31 UT: m1= 6.3:, Dia=3',DC=7/, ...20x80B...Alexandre Amorim(Florianopolis,Brazil)[predawn sky]
2002 Jan. 21.96 UT: m1= 6.4:, Dia=3',DC=6, ...20x80B...Alexandre Amorim(Florianopolis,Brazil)[comet 7 degrees above horizon]
2002 Jan 22.52UT: m1=6.0, Dia=5', DC=6...20x80B...Andrew Pearce (Lancelin, Western Australia)[Comet observed very low in evening twlight, tail not visible clearly]
2002 Jan 22.83UT: m1=6.2, Dia=5', DC=6...20x80B...Andrew Pearce (Lancelin, Western Australia)[First observation of the comet in the morning sky. Again bright twilight hampered observations of any tail]
2002 Jan 24.83UT: m1=6.0, Dia=4', DC=7...20x80B...Andrew Pearce (Nedlands, Western Australia)[Tail clearly visible, 0.5 deg long in PA 172 deg]
2002 Jan. 26.31 UT: m1= 6.4, Dia=5',DC=7,tail=0.1 deg in PA180...20x80B...Alexandre Amorim(Florianopolis,Brazil)[twilght]
2002 Jan 26.83 UT: m1=6.2:, Dia=2'.2, DC=6...20x80B...Andrew Pearce (Nedlands, Western Australia)[Difficult observation as comet only located 1' from 6th mag star at the time of the observation]
2002 Jan 27.85UT: m1=4.6, Dia=3.5', DC=8...20x80B...Andrew Pearce (Nedlands, Western Australia)[Comet has clearly undergone a significant brightness increase in the last 24 hours or so. Surface brightness of the coma has increased significantly. Faintly visible to the naked eye even at only 10 deg altitude. Tail visible 0.5 deg long in PA 195 deg. Estimate made in 8x40B at the same time: m1=4.6, Dia=4', DC=8. I suspected something may be up the previous morning but the observation was hampered with the comet only 1' away from a 6th mag star. Quick examination of the comet through a 20cm reflector (90x) revealed an intense central condensation which appeared distinctly non stellar. No evidence of any split, however the telescope probably lacked the degree of resolution required to confirm this.]
2002 Jan 28.32UT: m1=4.8:, DC=7/...12x50B...Raquel Shida (Sao Paulo, Brazil)[Observed during twilight]
*2002 Jan. 29.78 UT: m1=3.0, Dia.=2', DC=8/...NE...Michael Mattiazzo (Wallaroo,South Australia) [Out-out method, transparency good, using the stars in the handle of the teapot for comparison VT mags 2.04, 2.62, 3.15, 3.45. Virtually starlike to the eye but 25x100mm binoculars reveal 2 bright jets emanating from opposite poles of the nucleus shaped like a wide parabola. In a 28cm telescope at 84x, the brighter jet is ~60" long in PA 250 and the fainter jet is ~25" long in PA 120 while the main tail points towards PA 200 and is >30' in length. Unfortunately moonlight interference is 99%. Magnitude not corrected for extinction however Phi Sgr (3.15) was at the same elevation as the comet]
*2002 Jan. 30.1111 m1=2.3, Dia.=45" (approx), DC=9...7x50 B...Mike Begbie (Harare, Zimbabwe) [ Bobrovnikoff (Out-Out Method) used. This was essentially like a variable star observation! Due to moonlight and low altitude haze (comet at 8 degrees altitude), the only thing visible was the central condensation! This appeared very much like a sharp-edged planetary disk - hence the DC =3D 9 rating - but was distinctly elongated, thus appearing as an oval feature about 45" across. Obviously something fairly profound has occurred with this comet. Comparison stars were Sigma Sagittarii (Nunki) and and Zeta Sagittarii which from this latitude were approximately 1 and 2 degrees higher than the comet respectively. Atmospheric extinction correctio n has not been applied.]
*2002 Jan 30.75 UT: m1=2.7, Dia=2', DC=9, tail=1.5 deg....NE...Terry Lovejoy (Thornlands, Queensland)[Almost impossible to distinguish from a star with the naked eye. In 15 x 80 Binoculars comet is spectacular with intense central condensation surrounded by well defined parabolic coma that flows back into a south curving dust tail that is bright for 0.5 deg. and is traceable to 1.5 degrees. Bright moonlight hampered visibility.]


*2002 Jan. 30.78 UT: m1=2.9, DC=8/...Naked Eye...Michael Mattiazzo (Wallaroo,South Australia) [Out-out method, transparency good, using the stars in the handle of the teapot for comparison VT mags Sig Sgr(2.04), Zet Sgr(2.62), Phi sgr(3.15), Tau Sgr(3.45). In 25x100mm binoculars, coma diameter=2.5' and the 2 bright jets observed yesterday morning have now developed into the classic parabola shape seen in drawings of the past. The tail is more prominent now arching over 2 degrees in length. In a 28cm telescope at 84x, the jets are separated by a "dark lane" . Moonlight interference 95%. Magnitude not corrected for extinction. Altitude of comet and comparison stars respectively are 13,10,11,13 and 9 degrees.]

*2002 Jan 30.85UT: m1=2.8, DC=8/...NE...Andrew Pearce (Nedlands, Western Australia)[Comet has continued to brighten and appears quite spectacular at the moment! Quick examination of the comet through a 20cm reflector (90x) shows a strong parabolic outline with the central condensation at the focus of this parabola. A star like false nucleus is now clearly visible at the centre of the central condensation. The comet has a distinct yellowish brown hue which is clearly evident even in small binoculars. Estimate made in 8x40B at the same time: m1=2.8, Dia=6.5', DC=8/ and in 20x80B: m1=2.9, Dia=5', DC=8/ . Broad tail 1.5 deg long visible in PA 196 deg. First 0.5 deg is of high surface brightness. Even in bright moonlight, this comet appears very impressive and one of the best since C/1995O1.]

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