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 CCD Images - Session 524 (2012-11-10)

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Objects Session Notes
Bullet C/2012 K5 (LINEAR) - Comet
Bullet 168P/Hergenrother - Comet
Bullet C/2012 S1 (ISON) - Comet
 
Bullet Variable Stars
Bullet Photometric Monitoring - Variables
- RX And, Z And, TT Ari, CI Cyg, SS Cyg, BL Lac, TZ Lyr

  Attempts: U And failed (wind),  CY Lyr failed (wind/poor sky),  GK Per failed (Cloud)
Bullet Astrometric Monitoring - Nearby Stars
- Ross 248 (HH And), 6Groombridge 34, Teegardens Star

Attempts: 61 Cyg failed (poor sky), 
- Evening session (2.9 hrs duration). 
Mixed conditions, wind affecting some images , cloud affecting others.
- Session operated under semi-automated control, with remote monitoring from indoors computer.  
(Power-Line networking)
- Ambient Temperature: Initially falling to +2.5 deg C (minimum) , before climbing to +6.0 degC as warm front approached, and cloud developed with light rain starting falling at end of session. 
- CCD operation -30 degC (at 70% average cooling).  
- main objectives of the session were to acquire images of selected project stars for ongoing photometric and astrometric analysis, and to image a number of deep sky objects 
-

Comet C/2012 K5 (LINEAR)

C/2012 K5 (LINEAR) 
(moving through starfield in Bootes)
Image Image
Annotated CCD Image (50% size)
5  x 60s exposure (average combine), 3x3 binning, C Filter 
2012-11-02 19:10 hUT (#520037-41)
12" LX200R  (at f/9.7) + ST-10XME		 False Colour CCD Image / Inverse Spectrum
(100% size, square root scaling, cropped)
Image details as left

 

C/2012 K5 (LINEAR)  - earlier image (2012-11-02)
(moving through starfield in Bootes)
Image Image
Annotated CCD Image (50% size)
5  x 60s exposure (average combine), 3x3 binning, C Filter 
2012-11-02 19:10 hUT (#520037-41)
12" LX200R  (at f/9.7) + ST-10XME		 False Colour CCD Image / Inverse Spectrum
(100% size, square root scaling, cropped)
Image details as left

 

C/2012 K5 (LINEAR)  - earlier image (2012-11-01)
(moving through starfield in Bootes)
Image Image
Annotated CCD Image (50% size)
5  x 60s exposure (average combine), 3x3 binning, C Filter 
2012-11-01 20:12 hUT (#519018-22)
12" LX200R  (at f/9.7) + ST-10XME		 False Colour CCD Image / Inverse Spectrum
(100% size, square root scaling, cropped)
Image details as left

 

C/2012 K5 (LINEAR)  - earlier image (2012-10-21)
(moving through starfield in Bootes)
Image Image
Annotated CCD Image (50% size)
5  x 90s exposure (average combine), 3x3 binning, C Filter 
2012-10-21 22:40 hUT (#517085-89)
12" LX200R  (at f/9.7) + ST-10XME		 False Colour CCD Image / Inverse Spectrum
(100% size, square root scaling, cropped)
Image details as left

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Comet 168P/Hergenrother

168P/Hergenrother
(moving through starfield in Andromeda)
Image Image
CCD Image (50% size)
6 x 15s exposure (average combine), 3x3 binning, C Filter 
2012-11-08 20:22 hUT (#523108-15)
12" LX200R  (at f/9.7) + ST-10XME		 False Colour CCD Image / Inverse Spectrum
(100% size, square root scaling, cropped)
Image details as left

 

168P/Hergenrother - earlier image (2012-11-04)
(moving through starfield in Andromeda)
Image Image
CCD Image (50% size)
9 x 15s exposure (average combine), 3x3 binning, C Filter 
2012-11-04 20:27 hUT (#521058-66)
12" LX200R  (at f/9.7) + ST-10XME		 False Colour CCD Image / Inverse Spectrum
(100% size, square root scaling, cropped)
Image details as left

 

168P/Hergenrother - earlier image (2012-11-02)
(moving through starfield in Andromeda)
Image Image
CCD Image (50% size)
7 x 15s exposure (average combine), 3x3 binning, C Filter 
2012-11-02 19:16 hUT (#520044-50)
12" LX200R  (at f/9.7) + ST-10XME		 False Colour CCD Image / Inverse Spectrum
(100% size, square root scaling, cropped)
Image details as left

 

168P/Hergenrother - earlier image (2012-11-01)
(moving through starfield in Andromeda)
Image Image
CCD Image (50% size)
6  x 15s exposure (average combine), 3x3 binning, C Filter 
2012-11-01 20:19 hUT (#519025-32)
12" LX200R  (at f/9.7) + ST-10XME		 False Colour CCD Image / Inverse Spectrum
(100% size, square root scaling, cropped)
Image details as left

 

168P/Hergenrother  - earlier image (2012-10-29)
(moving through starfield in Andromeda)
Image Image
CCD Image (50% size)
6  x 15s exposure (average combine), 3x3 binning, C Filter 
2012-10-29 19:19 hUT (#518017-28)
12" LX200R  (at f/9.7) + ST-10XME		 False Colour CCD Image / Inverse Spectrum
(100% size, square root scaling, cropped)
Image details as left

 

Animation showing motion of comet 168P/Hergenrother over a 5 hour period
(moving through starfield in Andromeda)

Image

CCD Image (cropped)
7 x 30s (average combine), 3x3 binning, C Filter 
Frame 1:  2012-11-02 19:16 hUT (#520044-50)
Frame 2:  2012-11-03 00:32 hUT (#520503-09)
12" LX200R  (at f/9.7) + ST-10XME

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C/2012 S1 (ISON) - Comet

C/2012 S1 (ISON) 
(moving very slowly through starfield in Cancer) 
5.79 AU distance from sun / beyond the orbit of Jupiter
Forecast mag +17.3

  

 CCD Image Animation (2 frames separated by 46 min)
rate of motion across field ~7 arc secs per hour

 Image

 CCD Image Animation
3x3 binning, C Filter, cropped
1)  2012-11-11 04:17 hUT (#524411-12), 2 x 180s (average combine)
2)  2012-11-11 05:03 hUT (#524422-23), 2 x 180s (average combine)
12" LX200R  (at f/9.7) + ST-10XME

 

C/2012 S1 (ISON) - 2012-11-02
Comet is highlighted by white cross-hairs

 C/2012 S1 (ISON) - Detailed View
Measured mag +17.1 (vs forecast mag of +17.3)

Image Image

 Annotated CCD Image (50% size)
5  x 180s exposure (average combine), 3x3 binning, C Filter 
2012-11-11 04:22 hUT (#524411-15)
12" LX200R  (at f/9.7) + ST-10XME

Annotated CCD Image (100% size, cropped)
Image details as left

  

C/2012 S1 (ISON) - 2012-11-02

DSS2 Image of same area 
Note: the absence of any star or galaxy at position of comet 

Image Image
Image Image
Annotated CCD Image 
Image details as above		 Second Digital Sky Survey Image (negative)
Equivalent area to image to left

  

C/2012 S1 (ISON) - 2012-11-11
Comet is highlighted by white cross-hairs

Same area taken 4 days later - 2012-11-15
Former position of comet is highlighted by white cross-hairs

Image Image

 Annotated CCD Image (100% size, cropped)
5  x 180s exposure (average combine), 3x3 binning, C Filter 
2012-11-11 04:22 hUT (#524411-15)
12" LX200R  (at f/9.7) + ST-10XME

Annotated CCD Image (100% size, cropped)
4  x 120s exposure (average combine), 3x3 binning, C Filter 
2012-11-15 01:53 hUT (#525207-10)
12" LX200R  (at f/9.7) + ST-10XME

  

 

Diagrams illustrating the position of C/2012 S1 (ISON) at 2012-11-11, relative to Jupiter & Earth
(plots made using TheSky)
Closest approach to Sun will occur in Nov/Dec 2013.
From Scotland, we should have some really good view of the comets, both as it approaches in the solar system and as it recedes again.


2012-11-11 (04:00): just visible with CCD camera in Cancer (forecast mag +17.3)
2012-12-12  (night): comet moves into Gemini (forecast mag +16.7). and stay there for most of spring-summer 2013
  (comet will not be visible during Jun - mid-Sept period due to daylight)
2013-08-01 : comet moves back into Cancer (forecast mag +13.1)
2013-09-02 (06:00): about 2.5 deg from M44 (Beehive Cluster) in Cancer (forecast mag +11.7)
2013-09-20 (06:00) : passes around 2 deg from Mars, then tracks semi parallel to Mars for ~ 1 month.
2013-10-17 (06:00) : passes within 1 deg of Mars in Leo (forecast mag +8.3)
2013-10-30 (06:00) : photo opportunity with Mars and Moon (20% phase, 6 deg away).  (forecast mag +6.7)
2013-11-14 (06:00) : passing about 1 deg away Caldwell 52 in Virgo (forecast mag +3.9)
2013-11-23 (06:00) : comet (forecast mag +1.4) will lie in the SE sky just before sunrise, about 5 deg west of the planet Mercury. 
2013-12-01 (08:00) :  comet very low in the SE sky (5-8 deg above horizon) just before sun rise (forecast magnitude -2).
It will gradually climb higher in the sky passing by the Earth on its way out from the Sun. and with pass through Serpens Caput, Hercules, Corona Borealis, 
2013-12-25 (08:00) : in Hercules (forecast mag +4.0)
2014-01-07  (12:00) : comet will lie within 3 deg of Polaris in Ursa Minor (forecast mag +5.6)

 Image

 Image

 

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Variable Stars

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This Web Page: CCD Images - Session 524 (2012-11-10)
Last Updated : 2017-12-09
Site Owner : David Richards
Home Page : David's Astronomy Web Site