Telescopes at Millikin

  • Parallax Instruments 20" Ritchey-Chrétien
Model No.

PI500R, 20"
Clear Aperture
508mm
Focal Ratio
F/8.1
Focal Length
4114mm
Primary & Secondary Mirror Substrate
Zero Expansion Astrositall
Telescope Tube
Low Expansion Carbon Fiber
Secondary Amplification
2.70X
Spacing (Approx.)
40"
Mirror Coatings
AlSiO
Optical Tube Dia.
24"
Optical Tube Length
56"
Optical Tube Weight
130lbs.
Focuser
2.7"
Finder Scope
7X50
Tube Rings
Standard
Primary Cooling Fan
Standard (Quantity 3)
Slewing Handle
Standard
Tube C'wt Bar Assy.
Standard (Quantity 2)

 

  • Meade LX 200 8" Schmidt-Cassegrain
  • f
    6.3
    10
    Focal Length
    1280mm
    2000mm
    Aperture
    203mm
    203mm
    Secondary
    88mm
    76mm
    Obstruction
    43%
    37%
    Type
    SCT
    SCT
    Drive
    Fully computer controlled; 64359 object library; automatic GO TO capability
    Altaz
    Yes
    Polar
    Yes with optional wedge
    Eyepiece
    26mm Plossl
    Finder
    8x50
    RS232
    Yes
    Power
    18v DC (AC adapter included)
    Weight
    41lbs
    41lbs
    Tripod
    Standard

CCD Cameras at Millikin

  • ST-7XME
    CCD Kodak KAF-0402ME + TI TC-237
    Pixel Array 765 x 510 pixels, 6.9 x 4.6 mm
    Total Pixels 390,000
    Pixel Size 9 x 9 microns
    Full Well Capactiy (ABG) ~50,000 e-
    Full Well Capactiy (NABG) ~100,000 e-
    Dark Current 1e-/pixel/sec at 0C
    Antiblooming KAF-0402ME is NABG only ABG optional (KAF-0402LE)
    Shutter Electromechanical
    Exposure 0.11 to 36000 seconds, 10ms resolution
    Correlated Double Sampling Yes
    A/D Converter 16 bits
    A/D Gain 2.6e-/ADU
    Read Noise 15e-RMS
    Binning Modes 1 x 1, 2 x 2, 3 x 3
    Pixel Digitization Rate Up to 420,000 pixels per second
    Full Frame Acquisition ~35 seconds
    Field of View 12 x 8 arcminutes on f/10 Meade LX 200
    Pixel Size .9 x .9 arcseconds on f/10 Meade LX 200
    Limiting Magnitude Magnitude 14 in 1 second
    (for 3 arcsec FWHM stars) Magnitude 18 in 1 minute
    Cooling - standard Single Stage Thermoelectric, Active Fan, Water Assist Ready -45 C from Ambient Typical
    Temperature Regulation +-0.1 C
    Power 5 VDC at 1.5 amps, +-12 VDC at 0.5 amp desktop power supply included
    Computer Interface Parallel
    Computer Compatibility Windows 98/2000/Me/NT/XP
    Guiding Dual CCD Self-Guiding

 

  • STL-1001E
  • Imaging CCD
    		Kodak Enhanced KAF-1001E
    Pixel Array
    		1024 x 1024 pixels, 24.6 x 24.6 mm
    Total Pixels
    		1.0 million
    Pixel Size
    		24 x 24 microns
    Full Well Capacity (NAGB)
    		200,000 e-
    Dark Curent
    		9 e-/pixel/second at 0 degrees C
    Antiblooming
    		NAGB only
    Shutter
    		Electromechanical
    Exposure
    		0.12 to 3600 seconds, 10 ms resolution
    Correlated Double Sampling
    		Yes
    A/D Converter
    		16 bits
    A/D Gain
    		2.0e-/ADU
    Read Noise
    		14.8e-RMS
    Binning Modes
    		1 x 1, 2 x 2, 3 x 3
    Full Frame Download
    		40.8 seconds
    Cooling - standard
    		Two-Stage Thermoelectric, Water Assist, -40 C from Ambient Typical
    Temperature Regulation
    		+-0.1 degrees C
    Power
    		10-18VDC, 12VDC nominal, Universal AC to 12VDC desktop supply
    Computer Interface
    		Parallel
    Computer Compatibility
    		WIndows 98/NT/2000/Me/XP/Mac OS-X
    Guiding
    		Dual CCD Self-Guiding Standard,

  • SGS-Self Guided Spectrograph

    Dispersion:

    Two gratings available, on a carousel for rapid selction

    150 lines per mm (4.3 Angstroms per pixel)

    600 lines per mm (1.0 Angstroms per pixel)
    Slit Width 100 microns wide Entrance Slit
    Accptance cone angle: F/6.3 by F/10
    Resolution:
    Narrow slit & 600 lines/mm 2.4 Angstroms
    Narrow slit & 150 lines/mm 10 Angstroms
    Wide slit & 600 lines/mm 10 Angstroms
    Wide slit & 150 lines/mm 38 Angstroms
    Relative Sensitivity to Diffuse Sources:
    Narrow slit & 600 lines/mm 1.0
    Narrow slit & 150 lines/mm 4.0
    Wide slit & 600 lines/mm 4.0
    Wide slit & 150/mm 16.0
    Dispersion: 1.07 or 4.3 Angstroms per pixel
    Resolution Emission line is recorded with 2.4, 10 or 38 Angstroms Full Width at Half Maximum
    Spectral coverage per frame About 750 Angstroms with the high resolution grating, or 32000 with the low resolution grating
    Center Wavelength Selection Calibrated Micrometer Adjustment
    Wavelenght Range 3800 to 7500 Angstroms
    Sensitivity Signal to noise ration of 10:1 for a 9th mag star, 20 minute exposure using a non-AGB ST-7 and a 10 inch (25 cm) apertaur in high resolution mode. An ABG ST-7 will reach magnitude 8. The low resolution mode will be 1.5 magnitudes more sensitive.
    Entrance Slit 18 micron (2.3 arcseconds wide with 63 inch focal length telescope or 72 microns
    Uses:

    Stellar Classification

    Analysis of Nebular Lines

    Indentification of spectroscopic binaries

    Measurement of Stellar proper motion to +/- 6km/sec accuracy

    Measurement of Emission Nebula Proper Motions

    Spectra of Laboratory and field sources