Comet C/2021 A1 Leonard

November 25, 2021November 25, 2021 cepheids

Image Info:
Object: Comet C/2021 A1 Leonard
DATE-OBS: 2021-11-24T23:59:46.308
EXPTIME(Seconds): 1800
SUBFRMS: 30
OBJCTRA: 12 44 54.89
OBJCTDEC: +32 16 14.5
Binning: 2 X 2
Plate Scale: 1.77″ /Pixel
Orientation: North Down/ East Left
Catalogs & Filter Magnitude Results:
Astrometry Catalog:UCAC4
Photometry Catalog:UCAC4
Imaging Filter: Astrodon Ex-BB
Photometry Mag: +8.64 V-band
Instruments:
CCD: KAF-8300 (5.4µm x 5.4µm)
TELESCOPE: C08, 1260.0mm
PRiSMv10, Tycho8.4
Site:
ORIGIN: Cepheid Observatory, India
SITELAT: +24:55:00:00
SITELONG:+75:33:58:99
Observers:
Cepheid Observatory
Vorion Scientific Observatory
Remark:
Sky Clear/Low Altitude

ExoClock project II: A large-scale integrated study with 180 updated exoplanet ephemerides

November 14, 2021November 14, 2021 cepheids

The ExoClock project is an inclusive, integrated, and interactive platform that was developed to monitor the ephemerides of the Ariel targets to increase the mission efficiency. The project makes the best use of all available resources, i.e., observations from ground telescopes, mid-time values from the literature and finally, observations from space instruments. Currently, the ExoClock network includes 280 participants with telescopes capable of observing 85\% of the currently known Ariel candidate targets. This work includes the results of ∼1600 observations obtained up to the 31st of December 2020 from the ExoClock network. These data in combination with ∼2350 mid-time values collected from the literature are used to update the ephemerides of 180 planets. The analysis shows that 40\% of the updated ephemerides will have an impact on future scheduling as either they have a significantly improved precision, or they have revealed biases in the old ephemerides. With the new observations, the observing coverage and rate for half of the planets in the sample has been doubled or more. Finally, from a population perspective, we identify that the differences in the 2028 predictions between the old and the new ephemerides have an STD that is double what is expected from gaussian uncertainties. These findings have implications for planning future observations, where we will need to account for drifts potentially greater than the prediction uncertainties. The updated ephemerides are open and accessible to the wider exoplanet community both from our Open Science Framework (OSF) repository and our website.

https://arxiv.org/abs/2110.13863

Photometry: HAT-P-19b

November 12, 2021November 12, 2021 cepheids

Exo-Planet, Class confirmed:
HAT-P-19b
Imaged/Calibration/Image solve:
PRiSM v10
Photometry and Data Fitting:
HOPS 3.0.4/Platform: Python 3.7.6
Instrument:
CCD: ATIK-383L+ mono
FILTERS: R
TELESCOPE: C8, 1263.0mm
Site:
ORIGIN: Cepheid Observatory, India, Vorion Scientific, India
SITELAT: +24:55:00:00
SITELONG:+75:33:58:99
Observers:
V.K.A, B.K., S. M., K.V.
Remark:
Sky Clear
End

Comet 29P/Schwassmann–Wachmann

November 2, 2021November 2, 2021 cepheids

Image:
Object: 29P/Schwassmann–Wachmann
DATE-OBS: 2021-11-01.94717
EXPTIME(Seconds): B/V/4680R/I/g’2/r’2/i’2/z’2/Exbb
SUBFRMS: B/V/52R/I/g’2/r’2/i’2/z’2/Exbb
OBJCTRA: 04 51 39.23
OBJCTDEC: +32 16 12.30
Catalogs/Filter Magnitude Results:
Astrometry Catalog: ATLAS: N, UCAC4: Y, GAIAEDR3: N
Photometry Catalog: : UCAC4: Y, APASS: N, ATLAS: N
Johnson/Bessel: (B): +., (V): +12.7, (R): +., (I): +.
Sloan: g’2: +., r’2: +., i’2: +., z’2: +.
Clear: CL: +.
Filters:
Sloan: u’2: N, g’2: N, r’2: N, i’2: N, z’2: N
Johnson/Bessel: U: N, B: N, V: N, R: Y, I: N
Clear/Other Filters: Clear: N, Ex-bb: N
Instruments:
Mount: SW EQ8-R
Switch: Pegasus UPB-2.0
Focuser: Pegasus UPB
CCD: ATIK-383L+mono/Atik-EFW (9 positions)
TELESCOPE: C08, 1260.0mm
PRiSMv10, Tycho8.4
Site:
ORIGIN: Cepheid Observatory, India
SITELAT: +24:55:00:00
SITELONG:+75:33:58:99
Observers:
K.V
Measures:
S.M, B.K, V.A.
Remark:
Sky Clear
End

C/2021A1 Leonard

November 1, 2021November 1, 2021 cepheids

Image:
Object: C/2021A Leonard
DATE-OBS: 2021-11-01.00211
EXPTIME(Seconds): B/V/600R/I/g’2/r’2/i’2/z’2/Exbb
SUBFRMS: B/V/10R/I/g’2/r’2/i’2/z’2/Exbb
OBJCTRA: 11 51 07.64
OBJCTDEC: +32 52 40.0
Catalogs/Filter Magnitude Results:
Astrometry Catalog: ATLAS: N, UCAC4: Y, GAIAEDR3: N
Photometry Catalog: : UCAC4: Y, APASS: N, ATLAS: N
Johnson/Bessel: (B): +., (V): +12.1, (R): +., (I): +.
Sloan: g’2: +., r’2: +., i’2: +., z’2: +.
Clear: CL: +.
Filters:
Sloan: u’2: N, g’2: N, r’2: N, i’2: N, z’2: N
Johnson/Bessel: U: N, B: N, V: N, R: Y, I: N
Clear/Other Filters: Clear: N, Ex-bb: N
Instruments:
Mount: SW EQ8-R
Switch: Pegasus UPB-2.0
Focuser: Pegasus UPB
CCD: ATIK-383L+mono/Atik-EFW (9 positions)
TELESCOPE: C08, 1260.0mm
PRiSMv10, Tycho8.4
Site:
ORIGIN: Cepheid Observatory, India
SITELAT: +24:55:00:00
SITELONG:+75:33:58:99
Observers:
K.V
Measures:
S.M, B.K, V.A.
Remark:
Sky Clear/Low Altitude
End