NGC 884/869 - Perseus Double Cluster
Introduction | Map | Sketch | My
Observations | References
On this page I collect my observations of the double star cluster NGC
884/869 in the constellation Perseus.
The open double star cluster NGC 884/869 in Perseus is
considered to be a first-rate deep sky object. Therefore, it has received
a 5-star rating from Stoyan. Supposedly the double cluster should be seen
with the naked eye, but I cannot confirm this. In small binoculars, however,
it can already be seen well - particularly, as a double cluster.
Size: 25' / 20' (Stoyan)
Distance: 7,600/6,800 light years (Stoyan)
Ranking: ***** (Stoyan)
Double cluster NGC 884/869 in Perseus (between Perseus and Cassiopeia)
Overview map: Perseus double cluster NGC 884/869 and Andromeda Galaxy M
The sketch by Michael Vlasov (DeepSkyWatch.com)
provides a rough impression of what I observed (my impression was much fainter
than the sketch):
of the NGC 884/869 Double Cluster by Michael Vlasov (Copyright © Michael
Vlasov 2016) - presented with the author's permission
My Own Observations
Observations Summer to Autumn 2016
of October 2016 (Sumène, Haute Loire, France; Heritage
100P; LT): Perseus Double
Cluster NGC 884/869 observed with Heritage
100P at various magnifications (both together at low magnifications
and one at a time at higher magnifications) and using binoculars - beautifully
seen, they were sparkling (but there the sky is particularly dark).
Observations February/March 2017
- On the third day of my "winter observations", I tried to find
the double cluster NGC 884/869 in Perseus. I was able to find
the open clusters, but using my binoculars, I was not able to tell which
of the two clusters I was viewing, or even both. The same was true
for the Heritage 100P telescope.
Using the GoTo mount,
however, revealed that I probably saw more or less both clusters.
At first, the star clusters appeared faintly, later they were better to see,
but never as beautiful as we saw them in France in autumn 2016.
- On February
18, I once again looked for the double cluster with the GSD
680 (8" Dobsonian) , and with this telescope
I was able to recognize the double cluster well.
Observations September 2017
- Sep 21, 2017 (Sumène, Haute Loire, France; Heritage
100P, LT ): Perseus Double
884/869 seen with the
naked eye as faint glow, observed with binoculars and Heritage
100P (24 mm), seen nicely
- Sep 22, 2017 (Sumène, Haute Loire, France; Heritage
100P, LT ): Perseus Double Cluster NGC 884/869 observed with
binoculars and Heritage 100P (24 mm),
- Sep 29, 2017 (Sumène, Haute Loire, France; LT
): Perseus Double Cluster NGC 884/869 observed with
binoculars (half moon, milky way hard to see with the naked eye)
Observations October/November 2017
- October 2017 (LT, TS): NGC 884/869 observed with binoculars.
- Nov 13, 2017 (LT, TS): NGC 884/869 observed with binoculars.
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