“I must say, Cepheid Observatory is one of the upcoming observatories to rock the world. The detailed information provided in the website enhances the zeal in me to learn more about Astronomy. The explained procedures of astronomical astrometry, photometry and spectroscopy , develops a sense of scientific revolution in the youth. Hoping for the best times with Cepheid Observatory.
“Thank you “
Khushi Arora (India)– She is currently doing graduation in scienceand want to be an astrophysicist and start an experimental laboratory of astrochemistry in India. She is an amateur astronomer and a motivational speaker . She is working as a citizen scientist and space educator.
Apophis is 1,120 feet (340-meter-wide) wide and made of rock, iron and nickel. It is probably shaped roughly like a peanut, though astronomers will have a better idea of its form when it passes by Earth this week, according to NASA.
The asteroid takes a full orbit around the sun about every 11 months. On March 5, it will come within 10,471,577 miles (16,852,369 km) of Earth at 8:15 p.m. EST (0115 GMT on March 6). That’s too far to be seen with the naked eye, but scientists will use planetary radar to image Apophis as it flies by using NASA’s Goldstone Deep Space Communications Complex in California and the Green Bank Telescope in West Virginia. They hope to determine the asteroid’s shape and learn more about the way it rotates.
“We know Apophis is in a very complicated spin state, it’s sort of spinning and tumbling at the same time,” Richard Binzel, a planetary scientist at the Massachusetts Institute of Technology, told Space.com.
Instrument: Catalog: MPC Bessell (B): +*.*, Bessell (V): +*.* Bessell (R): +15.2, Bessell (I): +*.* CCD: ATIK-383L+ FILTERS: R TELESCOPE: C11, 1623.0mm PRiSMv10, Astrometrica Site: ORIGIN: Cepheid Observatory, India, Vorion Scientific, India SITELAT: +24:55:00:00 SITELONG:+75:33:58:99 Observers: V.K.Agnihotri, B. Kumar, S. Mahawar, K.Vora Remark: Sky Clear. End
QSO 0957+561 is first discovered gravitational lens system by Walsh, Carswell, & Weymann in 1979. The quasar QSO 0957+561 appears twin (QSO 0957+561A and QSO 0957+561B) due to gravitational lensing by host galaxy YGKOW G1 that is located directly between Earth and the quasar. The expected distance of QSO 0957+561 from earth is around 9.0 billion Ly.
The photometric analysis of such lensed quasars a like QSO 0957+561 are studied to estimate the more accurate value of Hubble constant. Two images are photometrically examined for long time to estimate the time delay which is proportional to difference between distances travelled by to twin counterparts and mass lens model (which depends on host galaxy). The time delay approach is independent of both methods, like plank ΛCDM (Lambda cold dark matter) or Lambda-CDM model flat results and distance ladder + Type Ia SNe results, which are previously used to estimate Hubble constant (for more watch video link added below).
We imaged the QSO 0957+561A and QSO 0957+561B. An astrometric reduction of two optical centers of twin quasars in FITS image estimates the separation of 6 arc second due to gravitational lensing by host galaxy. We used photometric R band filter as expecting that redder part of optical spectrum should be more dominated due to high redshift z=1.4.
Instrument: Catalog: SIMBAD Bessell (B): +*.*, Bessell (V): +*.* Bessell (R): +16.4, Bessell (I): +*.* CCD: ATIK-383L+ FILTERS: R TELESCOPE: C11, 1623.0mm PRiSMv10, Astrometrica Site: ORIGIN: Cepheid Observatory, India, Vorion Scientific, India SITELAT: +24:55:00:00 SITELONG:+75:33:58:99 Observers: V.K.Agnihotri, B. Kumar, S. Mahawar, K.Vora Remark: Sky Clear. End
Cosmology with Time Delay Strong Lensing by Kenneth Wong
The spectrum below of the comet ISON shows how easy it is for amateurs to study astronomical spectra. This wonderful spectrum of ISON using a just an 80 mm refractor, simple Star Analyser grating, and a DSLR. It clearly shows the green glow from glowing Carbon (the so-called “Swan bands” – Wikipedia link) This image was captured from a rooftop in Rajasthan, and then processed in the RSpec software.