It is narrated from Sayyiduna Abu Basrah al-Ghifari (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) led us in the Asr prayer at al-Mukhammas. He (peace and blessings be upon him) said: "This prayer (Asr) was presented to the nations before you too, but they neglected it; so whoever guards it will be given a double reward, and there is no prayer after it until the star al-shahid rises."
Ibn Bukayr said: I asked al-Layth about al-shahid and he said: It is a star.
It is not permissible to abandon the sahih and well-known hadiths because of this hadith. It is not meant to state the time of Maghrib; rather, what is intended here is the negation of voluntary prayers after Asr.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2110