As part of a search for X-ray emission from RV Tau variable stars, we discovered a serendipitous X-ray detection of the closest RV Tau variable star, HD 143352. X-rays were detected in the 0.2–2.0 keV energy band, with most counts detected in the 0.5–1.0 keV band. The emission is consistent with a 10⁶ K plasma and L _X ∼ 2 10²⁸ erg s⁻¹. This would be the second RV Tau star detected in X-ray emission. However, after estimating the temperature (T _eff ∼ 6000 K) and bolometric luminosity (L _bol ∼ 4L _⊙) from the spectral energy distribution, we place HD 143352 on the main sequence. These stellar parameters suggest HD 143352 is neither an RV Tau variable nor a post-asymptotic giant branch star nor a super giant, but rather an early F-type main sequence star. The X-ray emission detected from HD 143352 is consistent with coronal-like emission with L _X/L _bol ∼ 10⁻⁶.

作为寻找 RV Tau 变星 X 射线发射的一部分，我们发现了对最近的 RV Tau 变星 HD 143352 的偶然 X 射线探测。在 0.2-2.0 keV 能带中检测到 X 射线，具有在 0.5–1.0 keV 波段中检测到的大多数计数。发射与10 ⁶  K 等离子体和L _X  ∼ 2 10 ²⁸  erg s ^-1一致。这将是在 X 射线发射中检测到的第二颗 RV Tau 星。然而，在估计温度（T _eff  ∼ 6000 K）和辐射光度（L _bol  ∼ 4 L _⊙) 从光谱能量分布中，我们将 HD 143352 放在主序列上。这些恒星参数表明 HD 143352 既不是 RV Tau 变星，也不是后渐近巨星分支星，也不是超巨星，而是早期的 F 型主序星。从 HD 143352 检测到的 X 射线发射与L _X / L _bol  ∼ 10 ^-6的类日冕发射一致。