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.
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How good is 177 Irma?
177 Irma scores 4.37/10 (Poor) on Lunoo, making it rated in the Asteroid category.
What are the best alternatives to 177 Irma?
See our alternatives page for 177 Irma for a ranked list with scores. Top alternatives include: 166 Rhodope, 195 Eurykleia, 143 Adria.
How does 177 Irma compare to 166 Rhodope?
See our detailed comparison of 177 Irma vs 166 Rhodope with scores, features, and an AI-powered verdict.
Is 177 Irma worth it in 2026?
With a score of 4.37/10, 177 Irma is a solid option in Asteroid. See all Asteroid ranked.
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