M40 (Winecke 4) NGC4290 and NGC4284

— M40 (Winnecke 4) — a double star in the constellation Ursa Major.
Also known as Messier 40 or WNC 4.
Some characteristics:
Distance from Earth: about 510 light-years.
Apparent magnitude: approximately 9.65 and 10.10.
Features: considered an optical double star — two independent objects at different distances from Earth that appear aligned from our point of view.
M40 was discovered in 1764 by Charles Messier, who mistook it for a nebula previously noted in that location by Johannes Hevelius, and added it to his catalog. The star was later rediscovered by German astronomer Friedrich August Theodor Winnecke in 1863.

— NGC 4290 and NGC 4284 — galaxies in the constellation Ursa Major.
NGC 4290: barred spiral galaxy (SBab), apparent magnitude about 12.0.
NGC 4284: spiral galaxy (Sbc), apparent magnitude about 13.5.
Location: NGC 4290 and NGC 4284 are located near M40. Under good dark skies, with an aperture telescope near M40, you can try to see NGC 4290, and with a telescope aperture of 350 mm or more, also NGC 4284.
<Important: M40 is one of the few objects in the Messier catalog that are not deep-sky objects. It is not included in the New General Catalog (NGC).>