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

The Jewel Box cluster is well placed

Dominic Ford, Editor
From the Deep Sky feed

Objects: NGC4755
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Across much of the world, the Jewel Box open star cluster (NGC 4755, also known as the Kappa Crucis Cluster; mag 4.2) in Crux will be well placed in the evening sky in coming weeks. On 5 April 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 , however, it is not observable because it lies so far south that it never rises above the horizon.

At a declination of 60°21'S, it is easiest to see from the southern hemisphere but cannot be seen from latitudes much north of 9°N.

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, NGC4755 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 NGC4755 is as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
NGC4755 12h53m30s 60°21'S Crux 4.2 0'00"

The coordinates above are given in J2000.0.

The sky on 5 Apr 2022

The sky on 5 April 2022
Twilight ends
Twilight begins

4-day old moon
Waxing Crescent


4 days old

Rise Culm. Set
Mercury 06:41 13:02 19:22
Venus 04:26 09:59 15:33
Moon 09:06 16:23 23:45
Mars 04:11 09:34 14:57
Jupiter 05:32 11:25 17:17
Saturn 04:09 09:32 14:55
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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