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 I try to log my observing and related activities in a regular blog - sometimes there will be a delay but I usually catch up. An index of all my blogs is on the main menu at the top of the page with daily, weekly or monthly views. My Twitter feed is below. I am also interested in photograping wildlife when I can and there is a menu option above to look at some of my images. I try to keep the news feeds from relevant astronomical sources up to date and you will need to scroll down to find these.

The Celestron 14 is mounted on a Paramount ME that I have been using for about 10 years now - you can see that it is mounted on a tripod so is a portable set up. I still manage to transport it on my own and set it all up even though I have just turned 70! It will run for hours centering galaxies in the 12 minute field even when tripod mounted.

 

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Tuesday
Feb102015

Jewel Box Cluster imaged from Siding Spring

DateTuesday, February 10, 2015 at 11:18AM

I used telescope T32 in Siding Spring to image NGC 4755 which is known as the Jewel Box Cluster.

 This is the image data:

Object Name: NGC 4755

Object Type: Open Cluster

Altitude: +59° 41' 50" 

Constellation: Crux

Major Axis: 10.0

Minor Axis: 10.0

RA (Topocentric): 12h 54m 34.695s 

Dec (Topocentric): -60° 26' 05.516" 

RA (2000.0): 12h 53m 37.001s 

Dec (2000.0): -60° 21' 22.011" 

Azimuth: 168° 01' 56" 

Axis Position Angle:   0° 00' 

Magnitude: 4.20

Transit Time: 04:37

Hour Angle: -00h 48m 58s 

Air Mass: 1.16

Rise/Set Notes: Always above horizon.

Source Catalog: Revised NGC

Constellation: CRU

Remarks: Jewel Box, Kappa Cru cl.

Date: 11/02/2015

Time: 03:47:49 DST

Constellation (Abbrev.): Cru

Screen X: 392.91

Screen Y: 316.63

Sidereal Time: 12:06

Julian Date: 2457064.19987269

and the telescope data

CCD: FLI Proline 16803T32 FOV 
QE: 60% Peak
Full Well:  > 100X Saturation Exposure (ABG)
Dark Current:  <0.07 e-/pixel/sec. @ -35º C
Pixel Size:  9um Square
Resolution:  0.63 arcsec/pixel
Sensor: KAF-16803 
Cooling: -35º C default 
Array:   4096 x 4096 pixels
FOV:  43.2 x 43.2 arcmin    
Filters: Astrodon E-Series. Red, Green, Blue.
Luminance, Ha, SII, OIII, V, I
Position Angle: 90º

Telescope Optics

OTA: Planewave 17" CDK 
Optical Design: Corrected Dall-Kirkham Astrograph 
Aperture: 431mm
Focal Length: 2912mm
F/Ratio: f/6.8 
Guiding: Active Guiding Disabled
Mount: Planewave Ascension 200HR

 

CCD: FLI Proline 16803T32 FOV Dark Current:  <0.07 e-/pixel/sec. @ -35º CPixel Size:  9um SquareResolution:  0.63 arcsec/pixelSensor: KAF-16803 Cooling: -35º C default Array:   4096 x 4096 pixelsFOV:  43.2 x 43.2 arcmin    Filters: Astrodon E-Series. Red, Green, Blue.

OTA: Planewave 17" CDK 
Optical Design: Corrected Dall-Kirkham Astrograph 
OTA: Planewave 17" CDK 
Optical Design: Corrected Dall-Kirkham Astrograph 

OTA: Planewave 17" CDK Optical Design: Corrected Dall-Kirkham Astrograph 

Aperture: 431mm
Focal Length: 2912mm
F/Ratio: f/6.8 
Guiding: Active Guiding Disabled
Mount: Planewave Ascension 200HR
Aperture: 431mm
Focal Length: 2912mm
F/Ratio: f/6.8 
Guiding: Active Guiding Disabled
Mount: Planewave Ascension 200HR

Aperture: 431mmFocal Length: 2912mmF/Ratio: f/6.8 Guiding: Active Guiding DisabledMount: Planewave Ascension 200HR

 

 

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