Bryce Harper hit a 451-foot home run on Wednesday. (Photo by John McDonnell / The Washington Post)

Bryce Harper’s first-inning home run off of Dodgers starter Bud Norris on Wednesday traveled 451 feet and landed in the rarefied air of the third deck at Nationals Park. It was Harper’s longest home run of the season and the third-longest home run of his career, trailing only the 453- and 452-foot home runs he hit last season.

“All of us in the dugout were pretty in awe,” second baseman Trea Turner said. “I’ve never seen a ball land up there.”

Bryce Harper’s 20th home run of the season landed in the third deck. (Via StatCast)

According to CSN’s Daniel Shiferaw, Harper’s home run landed in the lap of Rev. Dr. Susan Moore of D.C.’s All Souls Church. The spot — Seat No. 13 in Row J of Section 236 — could one day be marked by a red seat.

The Nationals began marking historic and long (i.e., landing in the third deck or Red Porch) home runs before last season, similar to how the Senators commemorated Frank Howard’s 500-level home runs with white seats at RFK Stadium.

The following six home runs, including two third-deck shots by Harper, were marked before the 2015 season:

Ryan Zimmerman’s Walk-Off HR, March 30, 2008

Mike Morse’s Red Porch HR, July 20, 2012

Jayson Werth’s Walk-Off HR, NLDS Game 4, October 11, 2012

Adam LaRoche’s Third-Level HR, April 5, 2014

Bryce Harper’s Third-Level HR, April 9, 2014

Bryce Harper’s Third-Level HR, NLDS Game 1, October 3, 2014

No home runs have been marked since, but a Nationals spokesperson said that Harper’s latest home run meets the criteria. No timetable has been set for adding another red seat to Section 236.

The blue seat marking the landing spot of Ryan Zimmerman’s walk-off home run in the first regular season game at Nationals Park in 2005. (Scott Allen/The Washington Post)