Review By Georgios Lekkas

January 20, 2021January 31, 2021 cepheids

“The website is very good! Very detailed information about the observations that contribute to science such as astronomical astrometry, photometry and spectroscopy. All the equipment and software used are written so it is very useful for other astronomers to compare observations and data. Keep up your amazing work!!.“

Georgios Lekkas (Greece) is undergraduate student at Physics Department at University of Ioannina (UOI). He is active in sunspot observations at AAVSO and SILSO. He images planetary systems at Planetary Virtual Observatory and Laboratory (PVOL), and recently joined as active member of the “Exoclock Project” affiliated with “Ariel Space Mission”.

Comet 141P/Machholz

January 14, 2021February 1, 2021 cepheids

Image:
Object: Comet 141P/141P/Machholz
DATE-OBS: 2021-01-14T14:40:15
EXPTIME: 1980.00 (seconds)
SUBFRMS: 22
OBJCTRA: 00 24 49.591
OBJCTDEC: -06 43 13.196
Instrument:
Catalog: UCAC4
Bessell (B): +*.*, Bessell (V): +*.*
Bessell (R): +14.8, 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

TCP J09370380+1657350 Photometry V/R/I

January 14, 2021January 14, 2021 cepheids

Image:
Object: TCP J09370380+1657350
DATE-OBS: 2021-01-13T20:16:18
EXPTIME: 1200.0 (seconds) for V/R/I
SUBFRMS: 10
OBJCTRA: 09 37 03.80
OBJCTDEC: +16 57 35.00
Instrument:
Catalog: UCAC4/USNOB1
Bessell (B): +*.*, Bessell (V): +14.614
Bessell (R): +14.848, Bessell (I): +14.734
CCD: ATIK-383L+
FILTERS: V/R/I
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:
K.Vora, V.K.Agnihotri, B. Kumar, S. Mahawar,
Remark:
Sky Clear. V and R band magnitudes are estimated using UCAC4 catalog. I band magnitude is estimated using USNOB1 catalog.
End

Sample Marked Image

JD mag Flt SNR ZeroPt Cat Design.

2459228.32211 14.848 R R 136.93 27.223 UCAC4 TCP
2459228.33774 14.734 I I 73.31 26.073 USNOB1 TCP
2459228.35160 14.614 V V 242.13 27.536 UCAC4 TCP
—– end —–

M38

January 12, 2021January 12, 2021 cepheids

Remotely imaged by Kuldip Vora, from Ahmedabad, India.

Image:
Object: M38
DATE-OBS: 2021-01-12T13:34:45.691200
EXPTIME: 2400.00 (seconds)
SUBFRMS: 20
OBJCTRA: 05 28 42.693
OBJCTDEC: +05 28 42.693
Instrument:
Catalog: UCAC4
Bessell (B): +*.*, Bessell (V): +*.*
Bessell (R): +*.*, 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:
K.Vora, V.K.Agnihotri, B. Kumar, S. Mahawar,
Remark:
Sky Clear
End

The Pinwheel Galaxy M101

January 12, 2021January 12, 2021 cepheids

The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) remotely imaged by Kuldip Vora, from Ahmedabad, India.

Image:
Object: M101
DATE-OBS: 2021-01-11T22:44:46.166400
EXPTIME: 2160.00 (seconds)
SUBFRMS: 120
OBJCTRA: 14 03 13.633
OBJCTDEC: +54 20 39.20
Instrument:
Catalog: UCAC4
Bessell (B): +*.*, Bessell (V): +*.*
Bessell (R): +7.76, 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:
K.Vora, V.K.Agnihotri, B. Kumar, S. Mahawar,
Remark:
Sky Foggy and Hazy
End

Comet 398P/Boattini

January 6, 2021January 7, 2021 cepheids

Image:
Object: Comet 398P/Boattini
DATE-OBS: 2021-01-06T15:17:36
EXPTIME: 3600.00 (seconds)
SUBFRMS: 30
OBJCTRA: 04 53 19.101
OBJCTDEC: +03 14 12.738
Instrument:
Catalog: UCAC4
Bessell (B): +*.*, Bessell (V): +*.*
Bessell (R): +14.6, 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:
NIL
End

M67 B/R Band Image Comparison

January 4, 2021January 4, 2021 cepheids

M67/NGC2682 image using B & R band filters. The exposure time normalized for CCD sensitivity (means more exposure in B band w.r.t band). We see the more stars in R Band compare to B band.

Filter Response Curves for Baader UBVRI filters:

M15

January 4, 2021January 4, 2021 cepheids

M15
C11/f5.8 + CCD
PRiSMv10

Bright Star Cluster GAIA DR3

January 3, 2021February 27, 2021 cepheids

Our friend, Willie Buning, Netherlands, provided the Gaia DR3 data within 30 Kparsec for bright star clusters (Globular as well as open clusters). The table generated by the python code developed by Joseph Karpinski. Willie modified the code a bit for plotting dominated bright star clusters in SQL or Excel. The spectral classification of stars inside clusters and their numbers presented in map. The image of Gaia DR3 map is shown below.