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 2948 (8,255 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/20210126.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 2948

IC 2948, C 1136-632, Cl VDBH 122, Ocl 864.0, COCD 295 (contains Thackeray's Globules)

RA: 11h 39m 5s
Dec: −63° 26′ 36″

Con: Centaurus
Ch: MSA:1003, U2:450, SA:25

Ref: SIMBAD, Archinal&Hynes (2003), Corwin (2004)

(reference key)

Type: bright nebula

Mag: B=?, V=?

Size: 45′ x 40′
PA: ?

Image gallery

Photos  (1)

Select a photo and click the button to view

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

IC 2948. See IC 2944.

Remarks

Labelled on Millenium Star Atlas as "Running Chicken Nebula."

Historical observations

NGC/IC Dreyer (1888, 1895, 1908)

This object was discovered photographically by R.H. Frost on plates taken with the 24inch Bruce refractor at the Arequipa station of Harvard Observatory. It is described in the NGC only as "extremely, extremely large."

Published comments

Wood, H.E. (1909)

Innes, R.T.A. & Wood, H.E. (1909) Notes on southern nebulae. Transvaal Observatory Circular, No.1, 14th December 1909, p35.

"A very large nebulous region - irregular in shape, somewhat resembling a pear. The star CPD-62°2127 (lambda Cen) is involved in the nebulae at the narrow end of the pear. The stars CPD-62°, 2154 2168, 2164, 2186, 2184, 2206, and 2142 are also surrounded by the nebulosity. There aer first through the nebula breaking it up into three main portions. The brightest portion of the nebula covers about 40' in declination and 5 minutes in RA, but there are fainter extensions about 1° from the main body. The nebula was photographed with the Franklin Adams Star Camera with an exposure of 150 minutes. The photograph also revealed many dark channels and holes in the Milky Way"

Burnham's Celestial Handbook

Burnham incorrectly calls the nebulosity IC 2944; he described it as very large, faint nebulosity, diam. 60' x 35', surrounds Lambda Centauri.

Gum, C.S. (1955)

Gum, C.S. (1955) A survey of southern HII regions. Mem.RAS, 67. [1955MmRAS..67..155G]

Colin S. GumA Survey of Southern H II Regions published in the RAS Memoirs, Vol. LXVII, lists this object as Gum 42. He gives the size as 75' x 50' and the intensity, or "visibility in the particular section of the Milky Way in which the object occurs" is rated as "bright" on a scale of vf - f - mb - b - vb. He notes that it corresponds to No. 118 in Sven Cederblad's 1946 catalogue. He placed it in Class II(IV) of his classification system of nebulae; Class II contains objects "irregular in shape with associated dark matter..." and Class IV contains "fainter objects in which the emission is concentrated in a ring or in a incomplete ring." He explains this in his Notes to the catalogue: "Class II with Class IV tendency. The central portion has been photographed by Thackeray. Early type stars within the nebula are [the second column contains photographic magnitude]:

HD 101008 9.0 B3

HD 101131 7.0 B3

HD 101190 7.2 B3

HD 101191 8.4 B2

HD 101205 6.7 B2

HD 101298 7.6 B3

HD 101413 8.2 B3

HD 101436 7.5 B3

Rodgers, Campbell & Whiteoak (1960)

In the catalogue of southern emission regions by Rodgers, Campbell and Whiteoak (1960), they call RCW 62 the "main Lambda Cen nebula, which is of uneven intensity." They give its size as 80' x 80' and call it "bright."

Photo index

by Jim Lucyk: Sky&Tel. 4/78 p296, Vehrenberg's Atlas of DS Splendors (3ed) p111, Deep Sky #22 p7, Astronomy mag. 5/88 p100.

Contemporary observations

Auke Slotegraaf

1997 March 24

1997-03-24, Monday. Jonkershoek. 11x80 tripod. Full Moon. Not found.

Richard Ford

2013 March 9th, Saturday

Location:Perdeberg.

Time:10:22pm.

Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.

Instrument:12-inch Dobsonian.

This nebula's two faint regions are extremely faint and that they are just being seen at both 57x and 75x.Through my OIII filter at close range the fine subtle details of these regions are clearly visible and that these two patches are orientated in a north-south direction.This nebula measures 19.5'x 16.2'.

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_0374ac6844c0cfb5268deaf2738f9d40, 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