19P/Borrelly
Alphonse Borrelly found this comet in
Marseille, France at December,28 1904.
The spacecraft Deep Space 1 performed a
flyby at September,21 2001.
The latest IAU telegrams or the latest CBET's. IAUC Astronomical Headlines.
Minor
planet center's orbital elements and Ephemeris,
the comet on
Seiichi Yoshida's Homepage,
Gary W.
Kronk's Cometography
Light
curves on Cometas Obs,
JPL Small body
database
Scientific links concerning 19P/Borrelly: Deep Space 1 camera, Wolfram Alpha, HST
lecture of the tail event of 19P/Borrelly on the meeting of the German comet group in fall 2009 (.ptf in German)
After getting the knowledge, that the long tail on our images
is a sunward tail, some conclusions are possible now.
Analysis page with some nice animations
June, 20 2009
The analysis of the second condensation/knot of 19P/Borrelly based on our observations.
Story board of the detection of a second knot in the tail of 19P/Borrelly in May 2009:
Sending the image of May, 7 to the Yahoo mailing goups: Comet images and Cometas_Obs
First confirmation message of
Francois Kugel:
http://tech.groups.yahoo.com/group/Comet-Images/message/5641
Second confirmation of
Francois Kugel:
http://tech.groups.yahoo.com/group/comets-ml/message/15547
Gustavo Muler couldn't confirm a second peak on his image of April, 23.
Francois Kugel (A77) remarked in the
comet-ml,
that the distance of the peak is decreasing to 8 arc seconds in PA 305� on his
image of May, 10.
"We
observe probably a reduction of the activity of the comet which s' move away."
The post-analysis of all images of this year is providing an interesting course of line profiles.
Giovanni
Sostero, Paul Camilleri, Enrico Prosperi and Ernsto Guido of
Italy (473) could find a knot or second condensation at May, 15
in 4.7 arcsec distance in PA 301�: Image taken with
a 0.61m f/10 Cassegrain + FLI Proline PL09000 CCD
http://tech.groups.yahoo.com/group/comets-ml/message/15556
Blog of the observation with the image
Sending officially the first three observations of Francois Kugel, the Italian amateurs and me to the CBAT at May, 15 UT21:24.
Esteban Reina (232) took an image of the comet at May, 15.97
with a 10" SCT f-3.3. He reported a second spot in 8 arcsec distance in PA 311�
http://es.groups.yahoo.com/group/Cometas_Obs/message/34652
image of Esteban
Leonid
Elenin (H10) of the Tzec
Maun Observatory, Mayhill (NM), confirmed in the comet-ML the
existence of "condensation" at ~4 arcsec in PA 301.
I think Bernhard is right - object is closer and closer to central condensation.
Gustavo Muler (J47) reported of an elongated central condensation on an image of May, 16 UT 22:13
Josep M. Bosch (B74) sent an image with two peaks, taken at May, 16.9123
Rolando
Lingustri (235) from CARA sent an image
and remarked at May, 17:
"However, from experience gained in recent years, in my opinion, there
are more fragments visible".
Sending officially the second email to the CBAT at May, 17 UT09:28 with additional observations.
At May, 18 2009 the IAUC 9044 reported the observations of Francois Kugel, France, G. Sostero, P. Camilleri, E. Prosperi, and E. Guido of Italy and my own observation.
At May, 18 2009 I could take 80 images with 3 min. exp. time each. On the main tail I found some knots, two of them were good enough for astrometry.
At June, 12 2009 a third knot is significant visible in about 11.25 arcsec distance to the central condensation.
After
coming in contact with a professional astronomer, Dr. Nalin
Samarasinha of
the PSI
Planetary Science Institute,
more light is coming into the dark.
Because fragments can normally only pushed into the direction of the intrinsic
tails, our observations are probably dust phenomenons.
Analysis of our observations after the knowledge of the origin of the tails.
19P/Borrelly between March, 20 and June, 12 2009 All stars are removed.
At this day the long sunward tail decreased its activity a bit.
� 2009-06-16 by Bernhard Haeusler, Maidbronn, Germany
90 min. exposure, 2009-06-16 UT
21:23 to UT 22:57 12" SCT
f-6.532 + CCD ST10XME
18.42 mag, coma: 0'15", tail: 3'55" in PA 302�
Finally we had a complete clear night at June, 12. The tail is
spreading over 13 arcmin.
The third knot is visible pretty good. See also my
image of May, 7.
� 2009-06-12 by Bernhard Haeusler, Maidbronn, Germany
153 min. exposure, 2009-06-12 UT
20:55 to UT 23:35 12" SCT
f-6.532 + CCD ST10XME
18.12 mag, coma: 0'15", tail: 13'29" in PA 302�
On the Full Moon night at June, 7 2009 my place here had good
conditions for taking photos: good and deep seeing.
The second knot is still visible and a third knot became significant.
� 2009-06-07 by Bernhard Haeusler, Maidbronn, Germany
94 min. exposure, 2009-06-07 UT
21:20 to UT 22:54 12" SCT
f-6.532 + CCD ST10XME
18.33 mag, coma: 0'07", tail: 5'11" in PA 302�
� 2009-05-24 by Bernhard Haeusler, Maidbronn, Germany
81 x 3 min. exposure (243 min. total), 2009-05-24 UT
21:03 to UT 01:18 12" SCT
f-6.532 + CCD ST10XME
18.36 mag, coma: 0'07", tail: 7'07" in PA 297�
� 2009-05-21 by Bernhard Haeusler, Maidbronn, Germany
62 x 3 min. exposure (186 min. total), 2009-05-21 UT
21:13 to UT 01:19 12" SCT
f-6.532 + CCD ST10XME
17.91 mag, coma: 0'09", tail: 6'31" in PA 299�
On May, 18 2009 I could finally take more images of the comet.
� 2009-05-18 by Bernhard Haeusler, Maidbronn, Germany .gif animation 3.919 KB
80 x 3 min. exposure (240 min. total), 2009-05-18 UT 21:11 to UT 01:22 12" SCT
f-6.532 + CCD ST10XME
18.04 mag, coma: 0'09", tail: 6'23" in PA 297�
The central condensation seems to have a double structure this
day.
May be this is a special bright dust emission in PA 310� in 13 arc seconds
distance of the central condensation.
Meanwhile 3 other observers could confirm the second
spot. Story board
May,16
2009
More amateur collegues confirmed the existance
of one or more knots in the tail of 19P/Borelly. May,17
2009
Images of Rolando Lingustri (235) and Esteban Reina (232)
Grubbing in my old images I found some interesting pictures and
animations of comet C/1999 S4 (LINEAR):
"The Beauty and the Death of a comet"
� 2009-05-07 by Bernhard Haeusler, Maidbronn, Germany Line profile
42 x 3 min. exposure,
2009-05-07, UT 21:56 to
00:19, 12" SCT
f-6.532 + CCD ST10XME
17.66 mag, coma: 0'16", tail: 3'19" in PA 296�
Comparison of the line profiles of the last four images
� 2009-04-25 by Bernhard Haeusler, Maidbronn, Germany
10 x 3 min. exposure,
2009-04-24, UT 23:50 to
00:21, 12" SCT
f-6.532 + CCD ST10XME
17.68 mag, coma: 0'12", tails: 4'55" in PA 294�
� 2009-04-22 by Bernhard Haeusler, Maidbronn, Germany
9 x 3 min. exposure,
2009-04-22, UT 23:32 to
00:01, 12" SCT
f-6.532 + CCD ST10XME
17.72 mag, coma: 0'06", tails: 3'07" in PA 294�, 24" in PA 300�
Inspite of the 94% Moon in 70� distance the complex structure of
the inner and outer tails are visible quite good.
I wonder how professional images would look like?
� 2009-04-12 by Bernhard Haeusler, Maidbronn, Germany
50 x 3 min. exposure,
2009-04-12, UT 00:05 to
02:42, 12" SCT
f-7 + CCD ST10XME
17.50 mag, coma: 0'10", tails: 7'35" in PA 291�, 22" in PA 216�, 34" in PA
� 2009-04-03 by Bernhard Haeusler, Maidbronn, Germany
30 x 3 min. exposure,
2009-04-03, UT 01:08 to
02:42, 12" SCT
f-7 + CCD ST10XME
17.23 mag, coma: 0'10", tail: 4'03" in PA 299�
� 2009-04-02 by Bernhard Haeusler, Maidbronn, Germany
20 x 3 min. exposure,
2009-04-02, UT 02:31 to
03:33, 12" SCT
f-7 + CCD ST10XME
17.25 mag, coma: 0'10", tail: 5'04" in PA 299�
� 2009-04-01 by Bernhard Haeusler, Maidbronn, Germany
41 x 3 min. exposure,
2009-04-01, UT 01:41 to
03:46, 12" SCT
f-7 + CCD ST10XME
17.28 mag, coma: 0'10", tail: 4'09" in PA 300�
Today the comet was passed by a unknown? Galaxy Cluster. The little curved tail in PA 292� is amazing.
� 2009-03-25 by Bernhard Haeusler, Maidbronn, Germany, image frozen on comet and stars
13 x 5 min. exposure,
2009-03-25, UT 01:43 to
02:49, 12" SCT
f-7 + CCD ST10XME
17.13 mag, coma: 0'15", tails: 6'35" in PA 301�, 0'44" in PA 292�,
2'08" in PA 128�
At this morning the skies were perfect and offered best conditions for taking this photo of 19P.
� 2009-03-20 by Bernhard Haeusler Germany frozen on the comet
15 x 5 min. exposure,
2009-03-20, UT 02:36 to
03:04, 12" SCT
f-7 + CCD ST10XME
17.18 mag, coma: 0'11", tails: 4'49" in PA 293�, 0'49" in PA 291�,
0'26" in PA 222�
After one month the structure of the complex tail is already visible, but the magnitude of the comet is slightly decreased.
� 2009-03-18 by Bernhard Haeusler Germany
9 x 3 min. exposure,
2009-03-18, UT 02:36 to
03:04, 12" SCT
f-7 + CCD ST10XME
17.11 mag, coma: 0'12", tail: 4'02" in PA 296�
The comet shows a wonderful combination of dust and curved ion tail at this morning.
� 2009-02-18 by Bernhard Haeusler Germany
20 x 3 min. exposure,
2009-02-18, UT 04:17 to
05:13, 12" SCT
f-7 + CCD ST10XME
16.85mag, coma: 0'10", tail: 2'51" in PA 295�