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

M31 is well placed

Sun, 01 Oct 2017 (145 days ago)

Dominic Ford, Editor
From the Deep Sky feed

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The Andromeda galaxy (M31) will be well placed for observation. It will reach its highest point in the sky at around midnight local time.

At a declination of +41°16', it is easiest to see from the northern hemisphere but cannot be seen from latitudes much south of 28°S.

From Ashburn (click to change), it will be visible all night. It will become visible at around 19:55 (EST) as the dusk sky fades, 31° above your north-eastern horizon. It will be lost to dawn twilight at around 06:03, 35° above your north-western horizon.

At magnitude 3.5, M31 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 M31 is as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
M31 00h42m40s +41°16' Andromeda 3.5 190'00"

The coordinates above are given in J2000.0.

The sky on 01 October 2017
Sunrise 07:05
Sunset 18:52
Twilight ends
Twilight begins

11-day old moon
Age of Moon
11 days

All times shown in EDT.
Rise Culm. Set
Mercury 06:35 12:40 18:44
Venus 05:03 11:30 17:58
Moon 16:51 22:07 02:26
Mars 05:15 11:39 18:03
Jupiter 08:41 14:12 19:43
Saturn 13:06 17:52 22:38


The circumstances of this event were computed using the DE405 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)




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