WASHINGTON — One week after the Obama administration said it would comply with a federal appeals court ruling ordering it to make public portions of a Justice Department memo that signed off on the targeted killing of a United States citizen, the administration is now asking the court for permission to censor additional passages of the document.

In the interim, the Senate voted narrowly last week to confirm David Barron, the former Justice Department official who was the memo’s principal author, to an appeals court judgeship. At least one Democratic senator who had opposed Mr. Barron over the secrecy surrounding his memo voted for him after the administration said it would release it.

The 41-page memo, dated July 16, 2010, cleared the way for a drone strike in Yemen in September 2011 that killed Anwar al-Awlaki, an American citizen accused by intelligence officials of plotting terrorist attacks. The American Civil Liberties Union and The New York Times are seeking the memo’s public disclosure in lawsuits under the Freedom of Information Act.

The Justice Department said it would soon disclose a version of the memo with the additional passages it wants to keep redacted blacked out. It said the additional passages discussed classified facts, not legal reasoning.