It's the first Monday in October, and the Supreme Court issued its order list after the "Long Conference" today. Buried in the middle is one of the weirdest orders I've seen:
17-8910 JOHNSON, JOSEPH V. UNITED STATES
Because the Court lacks a quorum, 28 U.S.C. § 1, and since the only qualified Justice is of the opinion that the case cannot be heard and determined at the next Term of the Court, the judgment is affirmed under 28 U.S.C. § 2109, which provides that under these circumstances “the court shall enter its order affirming the judgment of the court from which the case was brought for review with the same effect as upon affirmance by an equally divided court.” The Chief Justice, Justice Thomas, Justice Ginsburg, Justice Breyer, Justice Alito, Justice Sotomayor, and Justice Kagan took no part in the consideration or decision of this petition.
Order List, 01 Oct 2018 at 62 (PDF) (typography corrected).
So the junior justice, sitting alone, decides for the Court… presumably, he didn't need to answer the conference room door to do so.