sponsored by psychohistorian.org

DOCdb

Deep Sky Observer's Companion – the online database

 

Welcome, guest!

If you've already registered, please log in,

or register an observer profile for added functionality.

List:

log in to manage your observing lists

 browse:

 

 position:

 

 next:

 

 options:

summary

rename

prune

trim

remove

close

copy

combine

plan

bookmark

load

new

delete

marathon

favourite!

Full database:

Entire DOCdb database of 18,816 objects.

 browse:

 position:

NGC 7086 (16,759 of 18,816)

 next:

oc gc pln bn dn gx gxcl ast aka lost

Object:

list

bookmark

finder chart

altitude today

altitude (year)

 search:

½°, , in DOCdb


Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/yivumoo/public_html/show_object.php on line 167

show browsing

NGC 7086

NGC 7086, Cl Collinder 437, C 2128+513, Ocl 214, VI 32, h 2124, GC 4676

RA: 21h 30m 30s
Dec: +51° 35′ 0″

Con: Cygnus
Ch: MSA:1087, U2:57, SA:9

Ref: SIMBAD, Collinder (1931), DAML02, Archinal&Hynes (2003)

(reference key)

Type: open cluster, 22m

Mag: B=9.25, V=8.4

Size: 12′
PA: ?

Historical observations

William Herschel (c.1784)

Synonyms: H VI-032

Discovered in 1788 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "a beautiful cluster of pretty compressed stars 8' or 9' diameter, nearly round, considerably rich."

Published comments

Trumpler, R.J. (1928)

Trumpler (Lick Obs Bul, Vol 14, No. 420) gives the diameter as 7.5' and the class as 1 2 m.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 11.5 mag open cluster.

Photo index

Photo Index by Jim Lucyk: Observer's Guide (Astro Cards) 9-10/87 p28.

Modern observations

Walter Scott Houston

Houston notes: "easily picked up in my 5-inch moonwatch scope, this cluster appeared as an ill-defined loose scattering of stars, in a patch 9' to 12' across. Also, what resembles a still coarse cluster is almost tangent to the northwest." John Herschel mentions a red star in the cluster; this star is visual mag 10.2, and 28 of the stars in the cluster are brighter than mag 15.7.

Ancient City Astron.Club (1980)

Listed by the Herschel Club, described as "Counted 50 stars situated within this grouping. Very large and scattered. 8-inch, 48x."

Tom Lorenzin

Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "9M; 8' diameter; 50-plus 11M and dimmer members; rich, faint and compressed."

Brian Skiff

6cm - nice & sm. 10-15 *s res against hazy bkgrnd. two brtst *s nr center in

pa150.

15cm - sm mod f cl of 30 *s in a 10' area. only partially res @ 101x w/lg

surrounding haze 25' diam. fairly centrall condensed. BS, 2Jul1971, FtL.

- mod br fairly rich cl well detached from fld @ 50x, where it is

partially res with mod br haziness in core. 80x/140x: 6'-7' diam w/irreg

border, partic due to stragglers W & NW. brtst *s m11, lots coming in

around m13.5, lending to hazy/gran texture in 2'.5 core even @ 140x.

equal pair to W side outside cl. BS, 21Jun1991, Anderson Mesa.

25cm - med-sm and evenly concen. 10' diam w/40 *s. about a doz brtr members.

nice @ 90x.

30cm - 50 *s in sl concen cl. greatest concen on SE side, outliers spreading

N & W. more sharply bounded on NE to SE side. 15' N is a dk hole 25'

diam.

Favourite lists

Lacaille's catalogue

The Messier objects

Dunlop's catalogue

The Bennett objects

The Caldwell list

Named DSOs

Object search

First search phrase

    and

Second search phrase

Type of object to include:

open cluster
globular cluster
planetary nebula
bright nebula
dark nebula
galaxy
galaxy cluster
asterism & stars
unverified/lost
nova

The Bug Report

DOCdb is still in beta-release.

Known issues, feature requests, and updates on bug fixes, are here:

> Bug Report

Feedback

Found a bug? Have a comment or suggestion to improve DOCdb? Please let us know!

> Contact us

Help!

DOCdb is a free online resource that exists to promote deep sky observing.

You could help by sharing your observations, writing an article, digitizing and proof-reading historical material, and more.

> Find out more

Everything on DOCdb.net is © 2004-2010 by Auke Slotegraaf, unless stated otherwise or if you can prove you have divine permission to use it. Before using material published here, please consult the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 License. Some material on DOCdb is copyright the individual authors. If in doubt, don't reproduce. And that goes for having children, too. Please note that the recommended browser for DOCdb is Firefox 3.x. You may also get good results with K-Meleon. Good luck if you're using IE. A successful experience with other browsers, including Opera and Safari, may vary.