نحن نبلغ عن اكتشاف المسح الأرضي HATNet للأكسوبلانت HAT-P-68b الذي لديه سعة 0.724 ± 0.043 $M_{Jup}$ وقطر 1.072 ± 0.012 $R_{Jup}$. يتواجد الكوكب في مدار دائري بمدة 2.2984 يوم حول نجم كي بمؤشر نور معتدل V = 13.937 ± 0.030 وسعة 0.673 + 0.020 - 0.014 $M_{odot}$ وقطر 0.6726 ± 0.0069 $R_{odot}$. يتم تأكيد طبيعة النظام الكوكبي من خلال التصوير الترانسيت المتبع الذي تم الحصول عليه مع مرآة FLWO 1.2m، والسرعات السريعة المقياسة باستخدام Keck-I / HIRES، FLWO 1.5m / TRES وOHP 1.9m / Sophie، والتصوير النقطي العالي الدقة من WIYN 3.5m / DSSI. يقع HAT-P-68 على خط الاصطلاح بزاوية $+3^{circ}$ وخارج من مجال عرض المهمة الأساسية لشركة NASA TESS ومهمة K2. يجعل HAT-P-68b بمعدل عمق الانحدار الكبير 0.036 مجلد ($r$-band) هدفا محتملا لتحديد السمات الجوية عبر الترانسميشن.
We report the discovery by the ground-based HATNet survey of the transiting exoplanet HAT-P-68b, which has a mass of 0.724 $pm$ 0.043 $M_{Jup}$, and radius of 1.072 $pm$ 0.012 $R_{Jup}$. The planet is in a circular P = 2.2984-day orbit around a moderately bright V = 13.937 $pm$ 0.030 magnitude K dwarf star of mass 0.673 $+$ 0.020 $-$0.014 $M_{odot}$, and radius 0.6726 $pm$ 0.0069 $R_{odot}$. The planetary nature of this system is confirmed through follow-up transit photometry obtained with the FLWO~1.2m telescope, high-precision RVs measured using Keck-I/HIRES, FLWO~1.5m/TRES, and OHP~1.9m/Sophie, and high-spatial-resolution speckle imaging from WIYN~3.5m/DSSI. HAT-P-68 is at an ecliptic latitude of $+3^{circ}$ and outside the field of view of both the NASA TESS primary mission and the K2 mission. The large transit depth of 0.036 mag ($r$-band) makes HAT-P-68b a promising target for atmospheric characterization via transmission spectroscopy.
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