Mount Rücker (78°11′S 162°32′E / 78.183°S 162.533°E / -78.183; 162.533 (Mount Rücker)) is a mountain, 3,815 metres (12,516 ft) high, immediately south of Johns Hopkins Ridge, in the Royal Society Range, Victoria Land, Antarctica. It was discovered by the British National Antarctic Expedition (BrNAE; 1901-04) which named it for Sir Arthur Rucker, Honorary Secretary of the Royal Society.

Mount Rücker is in central Royal Society Range on the main north-south ridge that includes Mount Lister to the north and Mount Huggins to the south. The Johns Hopkins Ridge extends to the north. Rutgers Glacier forms to the west of the mountain and flows southwest to the Skelton Glacier, as do Allison Glacier and Dale Glacier which form on the ridge that extends down to Mount Huggins. Rücker Ridge extends east from Mount Rücker . Radian Glacier and Walcott Glacier flow southeast from the ridge system towards Koettlitz Glacier.

Features and nearby features include:

78°08′S 162°28′E / 78.133°S 162.467°E / -78.133; 162.467. A prominent ridge running northward from Mount Rücker for 6 nautical miles (11 km; 6.9 mi). Mapped by the United States Geological Survey (USGS) from ground surveys and Navy air photos. Named by the United States Advisory Committee on Antarctic Names (US-ACAN) in 1963 for the Johns Hopkins University of Baltimore, Maryland, which has sent many researchers to Antarctica, and in association with nearby Carleton and Rutgers Glaciers.

78°08′00″S 162°27′00″E / 78.1333333°S 162.45°E / -78.1333333; 162.45. A peak rising to 3,271 metres (10,732 ft) between Sladen Summit and Borg Bastion in Johns Hopkins Ridge. Named by US-ACAN (1994) after Mark J. Engebretson, upper atmosphere physicist, Augsburg College, an authority in the correlation of Arctic, Antarctic, and spacecraft data.

78°10′S 162°29′E / 78.167°S 162.483°E / -78.167; 162.483 A prominent summit, 3,730 metres (12,240 ft) high, on Johns Hopkins Ridge, standing 1.7 nautical miles (3.1 km; 2.0 mi) northwest of Mount Rücker. Named by US-ACAN in 1994 after Scott G. Borg, a geologist who conducted field investigations in Antarctica, 1978-1994; from 1992, Program Manager for Polar Earth Sciences, Office of Polar Programs, NSF.

78°10′00″S 162°37′00″E / 78.1666667°S 162.6166667°E / -78.1666667; 162.6166667. A peak, 3,638 metres (11,936 ft) high, 1.25 nautical miles (2.32 km; 1.44 mi) northeast of Mount Rücker. Named by the US-ACAN (1994) after A. Carl Rester, astrophysicist, Institute for Astrophysics and Planetary Exploration, University of Florida. He was responsible for the instrumentation of a huge astrophysical observation balloon that was launched over Antarctica in January 1988.

78°12′S 162°50′E / 78.200°S 162.833°E / -78.200; 162.833. A high spur descending east from pointed Mount Rücker and forming the divide between Radian and Walcott Glaciers. Named after Mount Rücker by the New Zealand Victoria University of Wellington Antarctic Expedition (VUWAE), 1960-61.

78°12′00″S 162°52′00″E / 78.2°S 162.8666667°E / -78.2; 162.8666667. A prominent gully 0.5 nautical miles (0.93 km; 0.58 mi) west of Margaret Hill on Rücker Ridge. Named by the New Zealand Geographic Board (NZGB) (1994) following work in the area by a NZGS field party, 1977-78. Intense and intricate folds interlock like a jigsaw puzzle in the marble wall forming the eastern side of this gully.

78°12′00″S 162°55′00″E / 78.2°S 162.9166667°E / -78.2; 162.9166667. A peak rising to 1,874 metres (6,148 ft) on Rücker Ridge, 5 nautical miles (9.3 km; 5.8 mi) east of Mount Rücker. Named after Margaret Clark, a geologist with the 1977-78 New Zealand Geological Survey field party in this area. The form of the name has been selected to avoid redundancy of the name Clark in the region.

78°11′53″S 162°43′59″E / 78.198°S 162.733°E / -78.198; 162.733 A saddle on Rücker Ridge 4 kilometres (2.5 mi) east of Mount Rücker. A band of extremely hard pyritized shale is exposed in the saddle/pass, and when hit by a hammer the rock gives off a characteristic sulphurous smell.

78°14′00″S 162°25′00″E / 78.2333333°S 162.4166667°E / -78.2333333; 162.4166667. A mostly ice-covered mountain. 3,465 metres (11,368 ft) high, standing 3.3 nautical miles (6.1 km; 3.8 mi) south-southwest of Mount Rücker. A Maori name given by New Zealand Geographic Board (NZGB) in 1994 meaning “circular hill.”

78°17′S 162°29′E / 78.283°S 162.483°E / -78.283; 162.483. A large conical mountain, 3,735 m, surmounting the heads of Allison, Dale, and Potter Glaciers in the Royal Society Range. Discovered by the British National Antarctic Expedition (BrNAE; 1901-04) which named it for Sir William Huggins, President of the Royal Society, 1900-05. The mountain was first ascended by the explorer Richard Brooke in 1957.

78°17′00″S 162°25′00″E / 78.2833333°S 162.4166667°E / -78.2833333; 162.4166667. A mostly ice-covered mountain, 3,608 metres (11,837 ft) high, on the southwest shoulder of Mount Huggins. A Maori name applied by the New Zealand Geographic Board (NZGB) (1994) meaning “mountain of many glaciers.”

78°15′22″S 161°53′42″E / 78.25611°S 161.89500°E / -78.25611; 161.89500. An ice-covered spur which separates the lower ends of Rutgers Glacier and Allison Glacier on the west side of Royal Society Range. Named by US-ACAN (1994) after Robin R. Abbott, ASA, Helicopter Field Operations Coordinator at McMurdo Station, active in coordination and planning of science support in Antarctica from 1984.

• List of ultras of Antarctica

 This article incorporates public domain material from websites or documents of the United States Geological Survey.