description 177 Irma Overview
177 Irma is a dark, carbonaceous C-type asteroid in the main belt, with an estimated diameter of about 73 km. French astronomers Paul Henry and Prosper Henry discovered it on 5 November 1877, with Paul Henry credited for the discovery. Its orbit around the Sun takes about 4.61 years, and photometric observations give it a rotation period of roughly 13.86 hours.
help 177 Irma FAQ
What type of asteroid is 177 Irma?
177 Irma is a dark, carbonaceous C-type asteroid in the main belt. Its estimated diameter is about 73 kilometres.
Who discovered 177 Irma?
French astronomers Paul Henry and Prosper Henry discovered 177 Irma on 5 November 1877. Paul Henry is credited with the discovery.
How long is 177 Irma's year?
Its orbit around the Sun takes about 4.61 years. This is much longer than Earth's one-year orbit because 177 Irma is in the main asteroid belt.
Is 177 Irma bright in a telescope?
It is described as a dark C-type asteroid, so it reflects relatively little sunlight. Its visibility depends on its position, telescope size, and observing conditions.
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