Review By Khushi Arora

“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 science and 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.

Khushi Arora

Space Rock: Apophis

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.

Apophis

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

https://www.youtube.com/watch?v=gjS0c1mHAuU

Optical part of gravitational lens system, QSO 0957+561

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).

For more reading:

https://wwwmpa.mpa-garching.mpg.de/~komatsu/meetings/ds2013/schedule/suyu_desitterii.pdf

https://iopscience.iop.org/article/10.1086/320462/pdf

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

https://www.youtube.com/watch?v=YECujbmyTMo

R/I Photometry: S5 0716+714

Image:
Object: S5 0716+714/8C 0716+714 — BL Lac
DATE-OBS: 2021-02-19T16:59:54.7152
EXPTIME: 3600.00 (seconds)
SUBFRMS: 60
OBJCTRA: 07 21 55.576
OBJCTDEC: +71 20 36.22
Instrument:
Catalog: SIMBAD
Bessell (B): +15.5Bessell (V): +14.17
Bessell (R): +14.27, 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. The S5 0716+714 seems brighten about +1.0 mag at R band.
End

https://www.youtube.com/watch?v=5zwQmz9-1TU

Comet 409P/LONEOS-Hill

Image:
Object: Comet 409P/LONEOS-Hill
DATE-OBS: 2021-02-17T22:11:27
EXPTIME: 3000.00 (seconds)
SUBFRMS: 25
OBJCTRA: 13 05 29.257
OBJCTDEC: +08 54 09.190
Instrument:
Catalog: UCAC4
Bessell (B): +*.*, Bessell (V): +*.*
Bessell (R): +15.7, 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

Photometry: HAT-P-30b

Exo-Planet, Class confirmed:
HAT-P-30b
Imaged/Calibration/Image solve:
PRiSM v11
Photometry and Data Fitting:
HOPS 3.0/Platform: Python 3.7.6
Instrument:
CCD: ATIK-383L+ mono
FILTERS: R
TELESCOPE: C11, 1623.0mm
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

Comet C/2021 A1 (Leonard)

Image:
Object: Comet C/2021 A1 (Leonard)
DATE-OBS: 2021-02-12T23:17:45
EXPTIME: 2250.00 (seconds)
SUBFRMS: 50
OBJCTRA: 14 01 27.281
OBJCTDEC: +49 38 36.060
Instrument:
Catalog: UCAC4
Bessell (B): +*.*, Bessell (V): +*.*
Bessell (R): +18.3, 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. As per, Prof. Seiichi Yoshida comet@aerith.net, it may attend mag around +4.0 and go visible to eyes in mid of Dec-2021
End

COMET C/2021 A4 (NEOWISE)

Image:
Object: Comet C/2021 A4 (NEOWISE)
DATE-OBS: 2021-02-10T14:41:31
EXPTIME: 990.00 (seconds)
SUBFRMS: 22
OBJCTRA: 07 29 52.575
OBJCTDEC: +65 13 20.642
Instrument:
Catalog: UCAC4
Bessell (B): +*.*, Bessell (V): +*.*
Bessell (R): +14.9, 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

Comet C/2021 A2

Image:
Object: Comet C/2021 A2
DATE-OBS: 2021-02-05T15:34:36
EXPTIME: 855.00 (seconds)
SUBFRMS: 20
OBJCTRA: 07 08 29.439
OBJCTDEC: -04 06 49.090
Instrument:
Catalog: UCAC4
Bessell (B): +*.*, Bessell (V): +*.*
Bessell (R): +14.2, 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

Spectrum: Comet ISON

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.