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:

IC 4678 (14,922 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

Warning: fopen(/home/yivumoo/public_html/logs/showobject/20220117.txt): failed to open stream: Disk quota exceeded in /home/yivumoo/public_html/show_object.php on line 168

Warning: fwrite() expects parameter 1 to be resource, boolean given in /home/yivumoo/public_html/show_object.php on line 181

Warning: fclose() expects parameter 1 to be resource, boolean given in /home/yivumoo/public_html/show_object.php on line 182

show browsing

IC 4678

IC 4678, Ced 152b, Magakian 744

RA: 18h 06m 33s
Dec: −23° 56′ 49″

Con: Sagittarius
Ch: MSA:1392, U2:339, SA:22

Ref: [2003A&A...399..141M], SIMBAD

(reference key)

Type: reflection nebula

Mag: B=?, V=?

Size: ?
PA: ?

History and Accurate Positions for the NGC/IC Objects (Corwin 2004)

IC 4678. This was found on a photographic plate taken by Barnard around the turn of the century, and described in his article in AN 4239. About it, he only says, "There is a small, elongated, bright nebula in the position 1860.0 17h 59m 25s+- -23d 53m+-." The +- signs are important since there is nothing at Barnard's position. However, about 1.5 minutes of time west of that position is a small nebula that matches Barnard's description. As Barnard himself noted, it is clearly just a concentration in the general nebulosity of the area northeast of M8, but still stands out on blue-sensitive photos enough that it is unmistakably the object that Barnard was discussing. Other IC objects found by him on the same plate also have positions that are estimates, not real measurements. See NGC 6523, NGC 6526, NGC 6533, and IC 1271 for more discussion of the M8 area.

Published comments

Cederblad, S. (1946) [VII/231]

Ced 152b (IC 4678)

Position (1900): RA 18 1.9, Dec - 23 53

Star: -23 13906 (Mp=10.4, V=10.2, SpT=B6)

Spectrum of nebula: continuous spectrum (inferred from sp.t. of illuminating star)

Classification: Neb associated with mainly one star (which may be multiple) - star surrounded by a neb envelope without conspicuous structure (eg. lambda Scorpii)

Size: 4.5'x1'

Notes: "152 b = IC 4678 = -23 13906 nebulous. Disc. Barnard 1908 (85). FA 62. WP 92. (93 Pl 29 Pl 30, 366, 715. R. The star -23 13908 = HD 165345 projects against the nebula. The HD spectrum of this star is given to be K0, whereas Seares and Hubble (064) have B3."

Magakian T. Yu. (2003)

= [RK68] 83, IC4678, GN 18.03.5, Ced 152b

Class: C (reflection neb)

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.


Warning: Unknown: open(/tmp/sess_f9dce322cfadfd9d139d730f26ddd739, O_RDWR) failed: Disk quota exceeded (122) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct () in Unknown on line 0