177 Irma

Main-belt asteroid October 2019 yes (177) Irma #D6D6D6 177 Irma Орбита астероида 177.png Orbital diagram A877 VA; 1900 UB;1900 VA;1912 HE;1937 UA, 1962 DB Main belt P. P. Henry, 1877 5 November 1877 2.7685 AU Gm on 2.1110 AU Gm on 3.4260 AU Gm on on 4.61 yr (1682.5 d) 1.3893° 0.23749 13.856 h d on on C 9.49 0.0527 0.002 31 July 2016 (JD 2457600.5) 347.55° 38.184° 42.096° 0.21396 ms / day 115.30 yr (42113 d) 0 36.61 0.8 km 1.11401 AU Gm on 2.03001 AU Gm on 3.296 177 Irma is a fairly large and dark main belt asteroid. It was discovered by the French brothers Paul Henry and Prosper Henry on November 5, 1877. Paul was credited for this discovery. The meaning of the name Irma is unknown. Photometric observations of this asteroid at the Organ Mesa Observatory in Las Cruces, New Mexico in 2011 gave a light curve with a period of 13.856 ± 0.001 hours and a brightness variation of 0.30 ± 0.03 in magnitude. References Donald K. Yeomans 177 Irma JPL Small-Body Database Browser NASA Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=177 6 May 2016 . Lutz D. Schmadel Dictionary of Minor Planet Names Springer 29 6th 2012 3642297188 https://books.google.com/books?id=aeAg1X7afOoC&pg=PA29 . Pilcher Frederick Rotation Period Determinations for 31 Euphrosyne, 65 Cybele, 154 Bertha 177 Irma, 200 Dynamene, 724 Hapag, 880 Herba, and 1470 Carla The Minor Planet Bulletin 39 2 57–60 2012MPBu...39...57P . April 2012 External links 177 176 Iduna 177 178 Belisana Category:Background asteroids Irma Irma Category:C-type asteroids (Tholen) Category:Ch-type asteroids (SMASS) 18771105