Discoveries from the Cordell-Lorenz Observatory
Comet 21P Giacobini-Zinner on 9-21-2018 UT. Animation is made from 6x10sec stacked images at about 12 minute intervals.


Comet 21P Giacobini-Zinner on
9-21-2018 UT.

Animation is made from 6x10sec
stacked images at about 12
minute intervals.


Image uploaded on: 2018-09-24 09:51:21
NEOCP object N00ddem is clearly diffuse and cometary in stack of 90x10sec exposures. Located near the bright Third Quarter Moon and low in the SE as dawn approaches.Image by Dr. D. T. Durig of the Cordell-Lorenz Observatory (OBSCOD 850) at the University of the South in Sewanee, TN, USA.


NEOCP object N00ddem is clearly
diffuse and cometary in stack of
90x10sec exposures. Located near
the bright Third Quarter Moon
and low in the SE as dawn
approaches.Image by Dr. D. T.
Durig of the Cordell-Lorenz
Observatory (OBSCOD 850) at the
University of the South in
Sewanee, TN, USA.


Image uploaded on: 2018-07-05 05:21:27
15x10 second stacks taken at 4 minute intervals. Comet Lovejoy C/2017 E4 No coma, no nucleus, all tail. 10.6 arc min long at PA 341 Image by D. T. Durig Cordell-Lorenz observatory Sewanee TN USA ddurig@sewanee.edu


15x10 second stacks taken at 4 minute intervals.
Comet Lovejoy C/2017 E4
No coma, no nucleus, all tail.
10.6 arc min long at PA 341
Image by D. T. Durig
Cordell-Lorenz observatory
Sewanee TN USA
ddurig@sewanee.edu


Image uploaded on: 2017-04-20 05:45:39
Comet Lovejoy C/2017 E4. 2017 04 05 ut ~095200. Stack of 70 x 10 sec. Short break in the middle from passing clouds. 20x30 arc min frame so tail is longer than 30 arc min and coma is 4.5 arc min wide. Dr. D. T. Durig Cordell-Lorenz observatory Sewanee TN 37383 USA


Comet Lovejoy C/2017 E4.
2017 04 05 ut ~095200.
Stack of 70 x 10 sec.
Short break in the middle from passing clouds.
20x30 arc min frame so tail is longer than 30 arc min and coma is 4.5 arc min wide.
Dr. D. T. Durig
Cordell-Lorenz observatory
Sewanee TN 37383 USA


Image uploaded on: 2017-04-05 06:35:21
NEOCP/PCCP object gb00099 03/04/17 ~10:45-11:05 UT 15x10 sec stacks at 5 min intervals. Image by Dr. D. T. Durig Cordell-Lorenz Observatory OBS COD 850 Sewanee, TN 37383 ddurig@sewanee.edu


NEOCP/PCCP object gb00099
03/04/17 ~10:45-11:05 UT
15x10 sec stacks at 5 min intervals.
Image by Dr. D. T. Durig
Cordell-Lorenz Observatory
OBS COD 850
Sewanee, TN 37383
ddurig@sewanee.edu


Image uploaded on: 2017-03-04 06:05:14
NEOCP/PCCP object gb00099 from 3/3/17 about ~11 UT. Images are 15x10 sec stacks spaced about 5 minutes apart. Images by Dr. D. T. Durig, Cordell-Lorenz Observatory, OBS COD 850, Sewanee, TN, USA, ddurig@sewanee.edu


NEOCP/PCCP object gb00099 from 3/3/17 about ~11 UT. Images are 15x10 sec stacks spaced about 5 minutes apart. Images by Dr. D. T. Durig,
Cordell-Lorenz Observatory,
OBS COD 850,
Sewanee, TN, USA,
ddurig@sewanee.edu


Image uploaded on: 2017-03-03 06:08:53
Animation of 20x2min stacked exposres of LM03wSk from NEOCP/PCCP. Object is diffuse in single 2 min exposres and shows slight assymentry and short hinbt of a tail at PA 270.


Animation of 20x2min stacked exposres of LM03wSk from NEOCP/PCCP. Object is diffuse in single 2 min exposres and shows slight assymentry and short hinbt of a tail at PA 270.





Image uploaded on: 2015-12-20 05:58:18
Same image with pixels inverted to show details better.


Same image with pixels inverted to show details better.


Image uploaded on: 2015-12-08 02:43:59
Close-up of I049742 from Potential Comet Confirmation Page at MPC showing short tail 17 arc sec long at Position Angle 303. Object has a FWHM of about 1 arc sec greater than stars with a similar magnitude. Information the same as previous image.


Close-up of I049742 from Potential Comet Confirmation Page at MPC showing short tail 17 arc sec long at Position Angle 303. Object has a FWHM of about 1 arc sec greater than stars with a similar magnitude. Information the same as previous image.


Image uploaded on: 2015-12-08 02:36:01
I049742 from Potential Comet Confirmation Page at the Minor Planet Center. Each frame is a stack of 20x2 min images stacked on the motion vector of this new object. In the fifth frame it is clear of background stars and clearly shows a teardrop shaped coma and short tail about 17 arc sec long oriented at about PA 303. Images by D. T. Durig and P. S. Hearn at the Cordell-Lorenz Observatory, The University of the South, Sewanee, Tennessee, USA. OBS CODE 850. Images may be used if photo-credit is given and you notify me of their use at ddurig@sewanee.edu


I049742 from Potential Comet Confirmation Page at the Minor Planet Center. Each frame is a stack of 20x2 min images stacked on the motion vector of this new object. In the fifth frame it is clear of background stars and clearly shows a teardrop shaped coma and short tail about 17 arc sec long oriented at about PA 303. Images by D. T. Durig and P. S. Hearn at the Cordell-Lorenz Observatory, The University of the South, Sewanee, Tennessee, USA. OBS CODE 850.
Images may be used if photo-credit is given and you notify me of their use at ddurig@sewanee.edu


Image uploaded on: 2015-12-08 02:27:11
Comet Catalina C/2013 US10 at a wider FOV, about 20x30 arc minutes. Animated frames are stacks of 15x30 second exposures tracked on the motion of the comet. Image by Dr. Douglas T. Durig Cordell-Lorenz Observatory The University of the South Sewanee, Tennessee, USA Animation may be used if photocredit is given and you notify me at ddurig@sewanee.edu


Comet Catalina C/2013 US10 at a wider FOV, about 20x30 arc minutes. Animated frames are stacks of 15x30 second exposures tracked on the motion of the comet. Image by Dr. Douglas T. Durig
Cordell-Lorenz Observatory
The University of the South
Sewanee, Tennessee, USA
Animation may be used if photocredit is given and you notify me at ddurig@sewanee.edu


Image uploaded on: 2015-12-04 06:16:19
Animation of 20x 30 second images of Comet Catalina C/2013 US10 taken 12/04/2015. Image shows spectacular structure in teh gas tail. Image may be used with photo credit: Dr. Douglas T. Durig Cordell-Lorenz Observatory Sewanee, Tennessee, USA Obs Code 850


Animation of 20x 30 second images of Comet Catalina C/2013 US10 taken 12/04/2015. Image shows spectacular structure in teh gas tail. Image may be used with photo credit:
Dr. Douglas T. Durig
Cordell-Lorenz Observatory
Sewanee, Tennessee, USA
Obs Code 850


Image uploaded on: 2015-12-04 05:52:22
Stack of 40 x 30 second images with a 12 inch f/4.9 SCT on 12/03 UT, tracked on the motion of Comet Catalina. Ion tail shows a lot of structure! FOV is 11x16 arc minutes. Image by Dr. D. T. Durig Cordell-Lorenz Observatory Sewanee, Tennessee, USA Image may be used if photo credit is given and you send me information on the use.


Stack of 40 x 30 second images with a 12 inch f/4.9 SCT on 12/03 UT, tracked on the motion of Comet Catalina. Ion tail shows a lot of structure! FOV is 11x16 arc minutes.
Image by Dr. D. T. Durig
Cordell-Lorenz Observatory
Sewanee, Tennessee, USA
Image may be used if photo credit is given and you send me information on the use.


Image uploaded on: 2015-12-03 06:14:05
12 minute stack of 30 second images of Comet Catalina C/2013 US10 taken between 4:58 and 5:18 am CST 11/24/15 inverted to show details.


12 minute stack of 30 second images of Comet Catalina C/2013 US10 taken between 4:58 and 5:18 am CST 11/24/15 inverted to show details.


Image uploaded on: 2015-11-24 06:30:22
Average of 12 minutes of 30 second exposures of Comet Catalina C/2013 US10 taken 11/24/15.


Average of 12 minutes of 30 second exposures of Comet Catalina C/2013 US10 taken 11/24/15.


Image uploaded on: 2015-11-24 06:12:06
Same image without inverting BW and without reference stars marked. I got 9.3 magnitude and a 2 arc min coma with dust tail over 12 arc min long.


Same image without inverting BW and without reference stars marked. I got 9.3 magnitude and a 2 arc min coma with dust tail over 12 arc min long.


Image uploaded on: 2015-11-23 06:20:22
Stack of 12x30 sec images of Comet Catalina C/2013 US10 taken with a 12 inch f/2.6 SCT and 765x510 CCD. FOV is about 20x30 arc min. Gas tail (to the right) shows three streamers and dust tail (lower left) goes off frame. Image by Dr. D. T. Durig Cordell-Lorenz Observatory Sewanee, Tennessee. Image may be used if photo-credit is given and you let me know.


Stack of 12x30 sec images of Comet Catalina C/2013 US10 taken with a 12 inch f/2.6 SCT and 765x510 CCD. FOV is about 20x30 arc min. Gas tail (to the right) shows three streamers and dust tail (lower left) goes off frame.
Image by Dr. D. T. Durig
Cordell-Lorenz Observatory
Sewanee, Tennessee.
Image may be used if photo-credit is given and you let me know.


Image uploaded on: 2015-11-23 06:06:47
30 second image of Comet Catalina C/2013 US10 at very low altitude and with the light of dawn approaching fast. Taken on 11/21/2015 at 11:23:19 UT.


30 second image of Comet Catalina C/2013 US10 at very low altitude and with the light of dawn approaching fast. Taken on 11/21/2015 at 11:23:19 UT.


Image uploaded on: 2015-11-21 15:25:55
10 second image of Comet Catalina C/2013 US10 at very low altude as dawn approaches.


10 second image of Comet Catalina C/2013 US10 at very low altude as dawn approaches.


Image uploaded on: 2015-11-21 15:22:22
Comet Ikeya-Murakami C/2010 V1 False clor image of 5 stacked two minute exposures showing inner and outer coma structures. 2010 11 07 UT Image by Dr. D. T. Durig


Comet Ikeya-Murakami C/2010 V1
False clor image of 5 stacked two minute exposures showing inner and outer coma structures.
2010 11 07 UT
Image by Dr. D. T. Durig


Image uploaded on: 2010-11-09 05:32:35
Comet Ikeya-Murakami C/2010 V1 Animation of 20 x 2 min exposures. 2010 11 07 UT Dawn was approaching in the last few frames. Note the mushroom cap like hood of the outer coma and the short tail. Image by Dr. D. T. Durig


Comet Ikeya-Murakami C/2010 V1
Animation of 20 x 2 min exposures.
2010 11 07 UT
Dawn was approaching in the last few frames. Note the mushroom cap like hood of the outer coma and the short tail.
Image by Dr. D. T. Durig


Image uploaded on: 2010-11-09 05:24:20
NEOCP object 04F0011 from 2010 04 17 ut. Stack of 75x120 sec for a total exposure of 2.5 hours, tracked on the motion vector of the object. There appears to be a faint halo/coma with a size of about 80 arc sec. Image by Dr. D. T. Durig and K. M. Freeman at the Cordell-Lorenz Observatory at the University of the South.


NEOCP object 04F0011 from 2010 04 17 ut. Stack of 75x120 sec for a total exposure of 2.5 hours, tracked on the motion vector of the object. There appears to be a faint halo/coma with a size of about 80 arc sec. Image by Dr. D. T. Durig and K. M. Freeman at the Cordell-Lorenz Observatory at the University of the South.


Image uploaded on: 2010-04-17 03:04:15
Images of Comet 29P Schwassmann-Wachmann from Jan 27 (pre-outburst) at 15.8 to 14th mag, Feb 4 (in outburst)at 11.9 to 10.9 mag and Feb 11 (fading but growing in size) at 12.0 to 11.6 mag, all dates UT. Images are 15x2 minute stacks. On 2/11 there was an 11.8 mag star to the upper left of the coma producing the visible asymetry. Images by Dr. D. T. Durig and his students.


Images of Comet 29P Schwassmann-Wachmann from Jan 27 (pre-outburst) at 15.8 to 14th mag, Feb 4 (in outburst)at 11.9 to 10.9 mag and Feb 11 (fading but growing in size) at 12.0 to 11.6 mag, all dates UT. Images are 15x2 minute stacks. On 2/11 there was an 11.8 mag star to the upper left of the coma producing the visible asymetry. Images by Dr. D. T. Durig and his students.


Image uploaded on: 2010-02-11 22:19:38
Comet LINEAR 217P from Oct 1 UT as the Moon was setting. Stacks of 10xtwo minute exposures tracked on the motion of the comet. Notice how more and more of the comet's coma becomes visible as the Moon sets (and the comet gets higher in the sky). Images by Dr. D. T. Durig.


Comet LINEAR 217P from Oct 1 UT as the Moon was setting. Stacks of 10xtwo minute exposures tracked on the motion of the comet. Notice how more and more of the comet's coma becomes visible as the Moon sets (and the comet gets higher in the sky). Images by Dr. D. T. Durig.


Image uploaded on: 2009-10-01 06:25:20
Comet Yang-Gao P/2009 L2 6/19/09 UT Images by Dr. D. T. Durig and Prashanta Kharel for the Bridge Program 2009.


Comet Yang-Gao
P/2009 L2
6/19/09 UT
Images by Dr. D. T. Durig and Prashanta Kharel for the Bridge Program 2009.



Image uploaded on: 2009-06-21 23:38:49
Comet Itagaki C/2009 E1 6/20/09 UT Image by Dr. D. T. Durig and Prashanta Kharel for the 2009 Bridge program.


Comet Itagaki
C/2009 E1
6/20/09 UT
Image by Dr. D. T. Durig and Prashanta Kharel for the 2009 Bridge program.


Image uploaded on: 2009-06-21 22:54:52
Comet Holmes C/2008 N1 6/20/09 UT Image by Dr. D. T. Durig and Prashanta Kharel for the 2009 Bridge program.


Comet Holmes
C/2008 N1
6/20/09 UT
Image by Dr. D. T. Durig and Prashanta Kharel for the 2009 Bridge program.


Image uploaded on: 2009-06-21 22:53:26
Comet McNaught C/2006 Q1 6/20/09 UT Image by Dr. D. T. Durig and Prashanta Kharel for the 2009 Bridge program.


Comet McNaught
C/2006 Q1
6/20/09 UT
Image by Dr. D. T. Durig and Prashanta Kharel for the 2009 Bridge program.


Image uploaded on: 2009-06-21 22:52:17
Comet Catalina C/2009 K2 6/19/09 UT Image by Dr. D. T. Durig and Prashanta Kharel for the 2009 Bridge program.


Comet Catalina
C/2009 K2
6/19/09 UT
Image by Dr. D. T. Durig and Prashanta Kharel for the 2009 Bridge program.


Image uploaded on: 2009-06-21 22:50:17
Comet Christensen C/2006 W3 6/19/09 UT Image by Dr. D. T. Durig and Prashanta Kharel for the 2009 Bridge program.


Comet Christensen
C/2006 W3
6/19/09 UT
Image by Dr. D. T. Durig and Prashanta Kharel for the 2009 Bridge program.


Image uploaded on: 2009-06-21 22:45:43
Comet Yang-Gao P/2009 L2 from 6/17 UT. Images are stacks of 10 two minute exposures, with 10 minutes between each stack. Images by Dr. D. T. Durig and Prashanta Kharel.


Comet Yang-Gao P/2009 L2 from 6/17 UT. Images are stacks of 10 two minute exposures, with 10 minutes between each stack. Images by Dr. D. T. Durig and Prashanta Kharel.


Image uploaded on: 2009-06-20 22:42:52
Comet Lulin C/2007 N3 2009 02 23 10-~11:30 UT Stacks of 10x30 sec frames, but stacks starting at every 5th frame, so each 30 sec image is in two consecutive frames of the animation. Note the rays preceeding comet and the large plume from the tail well ahead of the coma. Images by Dr. D. T. Durig


Comet Lulin C/2007 N3
2009 02 23 10-~11:30 UT
Stacks of 10x30 sec frames, but stacks starting at every 5th frame, so each 30 sec image is in two consecutive frames of the animation. Note the rays preceeding comet and the large plume from the tail well ahead of the coma. Images by Dr. D. T. Durig




Image uploaded on: 2009-02-23 06:12:42
Comet Lulin 2-17 UT Animation of 10x30sec stack per frame. Notice several


Comet Lulin 2-17 UT
Animation of 10x30sec stack per frame.
Notice several "rays" leading on the right side of the comet.
Images by Dr. D. T. Durig


Image uploaded on: 2009-02-17 06:22:14
Animation of Comet Lulin C/2007 N3 from 2-16 UT. Images are stacks of 8x30sec. FOV is about 20x30 arc min. Images by Dr. D. T. Durig


Animation of Comet Lulin C/2007 N3 from 2-16 UT. Images are stacks of 8x30sec. FOV is about 20x30 arc min.
Images by Dr. D. T. Durig


Image uploaded on: 2023-05-25 15:20:28
Comet Lulin C/2007 N3 2009 02 16 UT 5-5:40 CST Stack of 31x30 sec Tail to the left, anti-tail to the right. Straight thin line at PA ~310, is this the ion tail? Image by Dr. D. T. Durig


Comet Lulin C/2007 N3
2009 02 16 UT 5-5:40 CST
Stack of 31x30 sec
Tail to the left, anti-tail to the right.
Straight thin line at PA ~310, is this the ion tail?
Image by Dr. D. T. Durig


Image uploaded on: 2023-05-25 15:20:28