Basic object information
Name: IC 4665
Type of object: Open cluster
Magnitude: 4.2
Size: 41.0'
Number of stars: 30
Magnitude of brightest star: 6.9
Object classification: III 2 p
Description: vvL sparse group,about 20 * mags 7....
Notes: Incl Struve 2212 8.5+9.0;3.1''sep;340 deg PA

Catalog position for epoch J2000.0
Right ascension: 17h 46m 18.0s
Declination: +5 43' 00"

Constellation: Ophiuchus

Observer: Iiro Sairanen
Obs. place: Kuopiola, Ruokolahti, Finland
Date/Time: 26/27.4.2003 1.50

Telescope: 16" Dobson f 4.5

Magn: 46x

Filter:

Field: 59'

NE Lim.mag: 6,2

Background sky: 3-4

Seeing: 2

Height: 26
Visuality: I
Weather: -5C

Kirkkaimmat tähdet muodostavat kolmion. Tähtiä noin 30.

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