2024JAVSO..52..137H

Query : 2024JAVSO..52..137H

2024JAVSO..52..137H - J. Am. Assoc. Variable star obs., 52, 137 (2024)

14 New Light Curves and an Updated Ephemeris for the Hot Jupiter HAT-P-54 b.

HEWITT H.B., HUTSON B., BROCKMAN M., CATOGNI E., FERREIRA R., FUSSELL G., JOHNSON A., KIGHT C., KILINSKI R.A., NGUYEN K., PERRY T., QUINLAN E., RANDAZZO E., REAGAN K., SUBERS K., NOGUER F.R., SIMON M.N. and ZELLEM R.T.

Abstract (from CDS):

Here we present an analysis of 14 transit light curves of the hot Jupiter HAT-P-54 b. Thirteen of our datasets were obtained with the 6-inch MicroObservatory telescope, Cecilia, and one was measured with the 61-inch Kuiper Telescope. We used the EXOplanet Transit Interpretation Code (EXOTIC) to reduce 49 datasets in order to update the planet's ephemeris to a mid-transit time of 2460216.95257 ± 0.00022 BJD_TBD and an updated orbital period of 3.79985363 ± 0.00000037 days. These results improve the mid-transit uncertainty by 70.27% from the most recent ephemeris update. The updated mid-transit time can help to ensure the efficient use of expensive, large ground- and space-based telescope missions in the future. This result demonstrates that amateur astronomers and citizen scientists can provide meaningful, cost-efficient, crowd-sourcing observations using ground-based telescopes to further refine current mid-transit times and orbital periods.

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Status at CDS : Objects in title, abstract, text, figures, and all or part of small table(s) being processed in SIMBAD.

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HAT-P-54b Pl 06 39 35.5181974296 +25 28 57.156510144           ~ 33 0

Query : 2024JAVSO..52..137H

Basic data :
HAT-P-54b -- Extra-solar Planet
Other object types: otypes_help 		Pl? (2015AJ,HAT), Pl (K2)
ICRS coord. (ep=J2000) : 		06 39 35.5181974296 +25 28 57.156510144 (Optical) [ 0.0147 0.0128 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		06 36 30.3440817912 +25 31 44.406244117 [ 0.0147 0.0128 90 ]
Gal coord. (ep=J2000) : 		188.7839565480034 +08.8978289002676 [ 0.0147 0.0128 90 ]
Proper motions mas/yr : 		-0.028 -33.194 [0.021 0.021 90] A 2020yCat.1350....0G
Parallaxes (mas): 		6.9701 [0.0174] A 2020yCat.1350....0G
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HAT-P-54b K2-410b

References (33 between 1850 and 2026) (Total 33)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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