... In 1930, Trumpler noticed that linear diameters (LD) of open clusters increase with distance (D) from the Sun. ... Since that time, the interstellar absorption has become one of the best studied factor in astrophysics, and we may hope that current OCL distance scales are free from this LD-D correlation. To verify if this is the case we have chosen several modern OCL distance scales and test them with the same clusters and the same angular diameters that Trumpler had used back in 1930. ...
Stellarium 0.12.3 . ... Classes . ... ClassљList . ... ClassљMembers . Telescope Member List . This is the complete list of members for Telescope , including all inherited members. diameter (defined in Telescope ) . ... diameter () const (defined in Telescope ) . ... focalLength () const (defined in Telescope ) . ... setDiameter (double theValue) (defined in Telescope ) . ... setHFlipped (bool flipped) (defined in Telescope ) . ... Telescope (const QObject &other) (defined in Telescope ) . ...
RTT150 . ... The primary mirror 1 reflects light to the secondary mirror 2 which collects it on the focal surface of system with the linear field of 30 mm diameter. Focal length, mm . ... Linear field of view, mm . ... Angular field of view . ... Concentration of light energy at 632.8 nm wavelength . on the optical axis within the circles of diameter: . 0.036 mm, %, at least . ... 0.060 mm, %, at least . ...
This is a new popup window - close it when you are done . Submitted by Al Takeda on 03/29/2012 13:07:33 . Mars after the 2012 Closest Approach . This image of Mars was taken 16 days after the March 5th closest approach to the Earth using the ATMoB’s 6-inch, f/15 Schupmann telescope. ... Telescope assistance was provided by John Blomquist. ... Ed Knight Observatory, ATMoB Clubhouse, Westford, MA, 21 March 2012. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...
We present the results of our observations of the white-light corona in polarized light performed at Criciuma eclipse, Brazil. During the observation of 3.11.94 we have made five couple of pictures of the solar corona in polarization light. ... Koutchmy S., Molodensky M., Starkova L., Ershov A., Matsuura O .: ... Molodensky M., Starkova L., Koutchmy S., Ershov A .: ... Koutchmy S., Molodensky M.M., Starkova L.I . ... Koutchmy S., Molodensky M.M., Starkova L.I. Koutvitsky V. and Ershov A . ...
... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...
ATM Forum Message . Forums: . ... Star Lap And Sub Dia. Tools . ... A star lap is used to adjust the action in a specific area, usually for parabolizing. your 2/3 diameter tool will do the same. ... Using a star lap on a sub diameter tool is a quick way to produce bad zones. ... I only made star laps on full sized tools. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...
RECREATIONAL TELESCOPES . ... ASTRONOMICAL TELESCOPES . ... The first line of LOMO® amateur telescopes 60 – 80 mm in diameter was produced in 1938. Now, under the ASTELE™ name, LOMO PLC and LOMO America are glad to offer you a new line of recreational astronomical telescopes ranging from 70 to 254mm in diameter, and a new line of spotting scopes from 30 to 95mm in diameter. ... Our line of recreational telescopes consists of several groups of scopes based on their optical parameters. ...
... GRIN lenses for telecommunication optics applications ? GTC (gradient telecom) lenses. ... GTC lenses are used in different fiber-optic devices: collimators, couplers, isolators and WDM etc . ... 2.Diameter . GTC lenses diameters are 1.0 mm, 1.8 mm, 3.0 mm and 4.0mm. ... 1.0 mm -3.0 mm diam GTC lenses are supplied in 0.22P, 0.23P, 0.25P, 0.27P and 0.29P length. 4.0 mm diam GTC lenses are supplied in 0.11P length. ... GTC . ... 3 scratches with 5mkm max width and 200mkm max length are allowed . ...
Superconducting Integrated Submm Spectrometer for Laboratory Applications Specification: · Input frequency range : 200 700 GHz (covered by four exchangeable sensor modules each one covering range of about 100-150 GHz ); · Output frequency (IF) range : 1-2 GHz · Receiver noise temperature: below 500 K (direct ... The SIR chip is a superconducting integrated circuit comprising a quantum-noise-limited SIS mixer and a tunable Josephson local oscillator (LO). ...
Estimating the NEO Population and Impact Risk: Past, Present and Future . ... Since most of the risk resides in the largest impactors, finding that fraction of the largest bodies, and that none of them has a significant chance of impacting in the next century or so, "retires" more than 90 % of the impact risk, including most of the risk of a globally catastrophic impact event. ... In the mid-size range, from ~150 m to ~1 km, the main risk is from tsunami generated by an ocean impact. ...
1,2 - Modifyted Richter-Slefogt Camera (355mm, 200 mm) The system was designed by V.Yu.Terebizh in 2001 (terebizh@crao.crimea.ua), and then has been made by Gennadiy Borisov . ... Very Wide Field Camera near Kislovodsk: MASTER WFC-Kislovodsk . Up to 1200 square degrees up to 13 m. Very Wide Field Camera near Moscow (40 x 60 square degree) (CCD 1392 x 1040 pix, Sony). ... This system can discover and measure satellites and space refuse parameters to within 0.1 ang.sec. precision. ...
Wide-angle telescopes for photometry and polarimetry in optical and infrared ranges . ... Investigation of the Earth’s atmosphere, comets, interplanetary and interstellar medium with brightness and linear polarization measurements of extended sources and sky background in optical and infrared spectral ranges. ... The devices are small diameter telescopes with CCD-detectors for optical and infrared spectral range with spectral and polarization filters. ... 15-cm telescope with cooling down to 80 K . ...
... Satellite data ] . SMIS ] . ... the satellite tracking in the whole upper hemisphere using previously calculated satellite coordinates . tracking accuracy: 0,5 degree . ... power supply: single phase, 220 V, 50 Hz . power consumption: less than 800 Wt . weight: less than 250 kg . permissible ambient temperature: -50oC to +50o C . permissible wind speed: work - 22 m/s, limit - 40 m/s. Back to SMIS Home Page . ...
Pulkovo NEO Page . Central Astronomical Observatory at Pulkovo . ... Control of Observations . ... NEA Accuracy Estimation . ACCURACY OF THE WORLD NEA OBSERVATIONS . Pulkovo method of accuracy estimation was applied to NEA observations. ... 2005 . 2006 . ...
To main of Laboratory . The research work and design of optical and optical-electronic devices are carries out by laboratory staff: . ... Lens: . ... In the layout 1 prism systems perform functions of dispersive element, corrector of aberrations, optical reducer. ... Spectral range 200 - 400 nm; . ... Back Forward . ... The main corrector's function are compensation of field aberrations of the main spherical mirror of a telescope (diameter of 600 mm, f'=1200 mm) and increase aperture ratio. ...
... Spherical aberration, coma, and astigmatism are also easily observed using the star test. ... Off-axis images are complex. ... Fig. ... Diffraction by a circular aperture as a function of defocus for no aberration Airy Disk 1 wave defocus Less than 1 wave defocus Fig. ... Diffraction by a circular aperture as a function of defocus for third-order spherical aberration Paraxial Focus Small distance inside paraxial focus Moderate distance from marginal focus Immediate neighborhood of marginal focus Fig...
... If you have wished to reach the Special astrophysical observatory the best way is to communicate with Tatyana N.Sokolova: . SAO RAS, Nizhny Arkhyz, . ... A visit to the 6-meter optical telescope BTA, the radiotelescopes RATAN-600 of 600 m in diameter of SAO RAS and the new 32-m dish of the Institute of Applied Astronomy of RAS. ... The visit to SAO, including meals, airflight and local transportation and accommodation, will cost a total of about 220 USD per person. ... 8 USD/per person/per night . ...