AAVSO: American Association of Variable Star Observers

Toward the Confirmation of an Ultra-Short Period Hot Jupiter “Puffy Planet” with a Near Grazing Transit, TOI-2341.01

Volume 50 number 2 (2022)

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Darcy Wenn
ELTHAM College of Education, 1660 Main Road, Research, VIC 3095, Australia; dtwenn@bigpond.com
Oscar Geerts
ELTHAM College of Education, 1660 Main Road, Research, VIC 3095, Australia; oscargeerts@gmail.com
Derrick Liu
ELTHAM College of Education, 1660 Main Road, Research, VIC 3095, Australia; dliu40207@gmail.com
Michael Fitzgerald
Las Cumbres Observatory, 6740 Cortona Drive, Goleta, CA 93117; psyfitz@gmail.com
Saeed Salimpour
Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany; IAU Office of Astronomy for Education, 69117 Heidelberg, Germany; Deakin University, 221 Burwood Hwy, Burwood, VIC 3125, Australia; astrophysics@saeedsalimpour.com
Andrew Yen
ELTHAM College of Education, 1660 Main Road, Research, VIC 3095, Australia; ayen@ELTHAMcollege.vic.edu.au

Abstract

This paper reports on ground-based observations of the candidate exoplanet TOI-2341.01 (TESS Object of Interest-2341.01), initially observed by the Transiting Exoplanet Survey Satellite (TESS). The analysis of data provides evidence for the increased likelihood that TOI-2341.01 is a Jupiter-sized gas giant with a radius of 86,409 km ± 6,011 km (RJup 1.209 ± RJup 0.084), orbiting the host star TOI-2341 at 0.0118 AU ± 0.00073 AU with a transit duration of 0.065 days ± 0.006 days (1.560 ± 0.144 hours or 93.6 minutes ± 7 minutes). TOI-2341.01 has an orbital period of 0.877640 days ± 0.000004 day (21.0634 hours ± 0.0002 hour) and has a mid-transit time of BJD_TDB 2459411.74201 ± 0.00010. Furthermore, a grazing criterion value of 0.99 ± 0.14 was calculated, determining that TOI-2341.01 is highly likely to be a near-grazing transit. It is also noted that estimated mass values were attained via the TESS Follow-up Observation Program, projecting TOI-2341.01’s mass as 55.3 ME (0.17 MJ) and thus possessing an estimated density of 122.28 kg/m^3 (0.12228 g/cm^3). This investigation has also cleared the field surrounding TOI-2341.01 out to 43 arcminutes of eclipsing binaries that could produce a false positive.