© Digitised Sky Survey (DSS); Second Palomar Observatory Sky Survey (POSS-II)

The cluster IC 4665 is well placed

Dominic Ford, Editor
From the Deep Sky feed

Objects: IC4665
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The open star cluster IC 4665 (mag 4.2) in Ophiuchus will be well placed in the evening sky in coming weeks. On 18 June it will reach its highest point in the sky at around midnight local time, and on subsequent evenings it will culminate four minutes earlier each day.

From San Diego , it is visible all night. It will become visible at around 21:08 (PDT), 33° above your eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 00:47, 62° above your southern horizon. It will be lost to dawn twilight at around 04:28, 32° above your western horizon.

At a declination of 5°38'N, it is visible across much of the world; it can be seen at latitudes between 75°N and 64°S.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.

At magnitude 4.2, IC4665 is tricky to make out with the naked eye except from a dark site, but is visible through a pair of binoculars or small telescope.

The position of IC4665 is as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
IC4665 17h46m20s 5°38'N Ophiuchus 4.2 0'00"

The coordinates above are given in J2000.0.

The sky on 18 Jun 2021

The sky on 18 June 2021
Twilight ends
Twilight begins

8-day old moon
Waxing Gibbous


8 days old

Rise Culm. Set
Mercury 05:10 12:02 18:54
Venus 07:16 14:24 21:32
Moon 13:24 19:42 01:51
Mars 08:27 15:26 22:24
Jupiter 23:45 05:17 10:49
Saturn 22:46 04:02 09:18
All times shown in PDT.


The circumstances of this event were computed using the DE430 planetary ephemeris published by the Jet Propulsion Laboratory (JPL).

This event was automatically generated by searching the ephemeris for planetary alignments which are of interest to amateur astronomers, and the text above was generated based on an estimate of your location.

Image credit

© Digitised Sky Survey (DSS); Second Palomar Observatory Sky Survey (POSS-II)


San Diego



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