Telescopes

150-cm Reflector Telescope

photo of 150-cm reflector telescope
specifications
Optical designRitchey - Chretien
Free aperture150 cm
Focal length1830 cm
Focal ratioF/12.2
FociCassegrain, Nasmyth × 2, Bent-cassegrain × 2
LocationLatitude 36°35′37″ N, Longitude 138° 58′ 35″ E, Altitude 885 m.

Gunma Astronomical Observatory Echelle Spectrograph (GAOES)

photo of GAOES
specifications
Wavelengths360 - 1000 nm
Resolution75,000 ( slit 1.0" , 3.2 pixels )
120,000 ( slit 0.6" , 2.0 pixels : max )
Slit length 8 arcsec ( 720 µm )
DetectorEEV CCD44-82BI
15 µm × 15 µm pixel
2048 × 4096 pixels
Type Semi-Littrow
Collimator lens system
Cameralens system
Echelle gratingR = 2.8, 31.6 gr/mm
blaze angle ( 70.3 deg )
Cross disperser (red) 250 gr/mm ( blaze 698 nm, 5.0 deg )
(blue) 400 gr/mm ( blaze 415 nm, 4.8 deg )
Efficiency10 %
Limiting magnitude11 mag, S/N = 100, 2 hours
Size1.37 m(D) × 1.74 m(W) × 0.9 m(H)
Weight~ 900 kg
MakerGenesia corporation

Gunma InfraRed Camera & Spectrograph (GIRCS)

Near-infrared camera with 150cm reflectorNear-infrared camera
specifications
DetectorHAWAII (HgCdTe 1024 X 1024)
0."4 / pixel, Field of view: 6.'8
Imaging10 filter positions
Broad band
J, H, K, Ks, K'
Narrow band
[Fe II] (1644 nm), H2 1-0 S(1) (2122 nm), Brγ (2166 nm), K continium (2144 nm), CH4 (2300 nm), CH4 (1580 nm)
Spectroscopy6 grism positions
J (1114 - 1397 nm): R ~ 1000
H (1439 - 1794 nm): R ~ 900
K (1959 - 2397 nm): R ~ 1000
slits: 1", 2", 4"

Gunma LOW resolution Spectrograph and imager (GLOWS)

CCD camera with 150-cm reflectorCCD camera
specifications (Imaging)
Chipe2v CCD55-30 1250x1152 Back-illumination
CoolingPeltier cooling
Field of view10 arcmin ( 0.6"/pixel )
FiltersB, V, R, I, blank.
specifications (Spectroscopy)
resolution400 ~ 500
wavelength400 ~ 800 nm
slit length40 arcsec
slit width1.8 arcsec ( ~ 3 pixel )

CCD camera

CCD camera with 150-cm reflectorCCD camera
specifications
ChipSITe 1024 × 1024, Back-illumination Grade 1
Coolingcooled by Liq. N2
Field of view10.0 arcmin ( 0.6"/pixel )

Eye pieces

position of eye piece

Used for stargazing parties.

65-cm Reflector Telescope

65 cm reflector
specifications
Optical designCassegrain
Free aperture65 cm
Focal length780 cm
Focal ratioF/12.2

cameras

cameraFLI / PL09000Apogee / AP7ZWO / ASI294
pixels3056 × 3056512 × 5124144 × 2822
pixel size12µm24µm4.6µm
pixel scale0.317"0.634"0.120"
field of view16.1'×16.1'5.4'×5.4'8.2'×4.7'
typefront illuminated ccdback illuminated ccdcmos

Solar Telescope

solar telescope

30-cm Reflector (Gregorian Coude) and small telescopes.

gallery

gallery

projected image

projected image

projected spectrum

projected spectrum

Small telescopes

small telescopes

6 small telescopes. (25 cm ~ 30 cm reflector)

Portable telescopes

portable telescopes

10 portable telescope. (10 cm refractor & 20 cm reflector)

Small portable telescopes

There are several small portable telescopes.