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 2792 (5,970 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 2792

NGC 2792, AM 0910-421, ESO 314-6, HD 79384, Hen 2-20, PK 265+04 1, PN G265.7+04.1, PN VV' 86, PN VV 50, PN Sa 2-36, Wray 16-36, h 3149, GC 1783

RA: 09h 12m 26.6s
Dec: −42° 25′ 39.9″

Con: Vela
Ch: MSA:943, U2:398, SA:20

Ref: SIMBAD, NED

(reference key)

Type: planetary nebula, E

Mag: B=?, V=11.8

Size: 0.39′ x 0.35′
PA: ?

Image gallery

Sketches  (1)

Select a sketch and click the button to view

Photos  (1)

Select a photo and click the button to view

Historical observations

John Herschel (1847) Cape Observations

Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He wrote: "planetary nebula, observed with Mr Maclear and another gentleman." He recorded it as "pF, exactly round, equal to a star 9th mag, but of a dull light. At first I was inclined to think it double, but with 320 it exhibited a uniform round disc; nor did a friend to whom I showed it see any division. Stars to-night perfectly well defined. In a field with leading stars, or which a diagram was made." On a second occassion he called it "pB, R, 6 arcseconds diameter, equals in light a star about 9th mag, a very careful and good observation." His third observation was recorded as "Viewed past meridian. It occurs in a field with about 40 stars. Diameter 4 or 5 arcseconds at the utmost; 10 arcseconds is too large certainly. Very like .. [NGC 2452]. But now the night is good and it bears magnifying. With 320 power the disc is dilated into a dim hazy round nebula; yet there is a peculiarity in its appearance which completely separates it from all nebulae of the same size. A very remarkable object."

Innes, R.T.A. (1918)

Innes, in Union Obs. Circ., No. 41, p 345, notes: "An 11th mag. planetary nebula about 20'' in diameter. Is N.pr. a pair of 10.5 mag stars. No stars within 3'. 1917, Mar. 16"

Published comments

Evans & Thackeray (1950)

A photographic survey of bright southern planetary nebulae. M.N.R.A.S., 110(5), 429-439.

"We find a typical, almost symmterical, ring nebula, with central star. The ring is slightly brigthter to the south. Diameter 13''. Plate 8, Fig. 3

Helwan Obs. Bulletin No 22 (1921)

Planetary; pB, S, vlE 165deg approx; appears as a nearly uniform disc without a central star.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 13.5 mag planetary nebula.

Modern observations

Brian Skiff

15cm - mod br tiny puff @ 80x. 195x: m10.5-11, 12"-15" diam. annular w/*-like points on SE (much brtr) and NW (exf). cen * maybe also? BS, 24Feb1990, LCO.

Contemporary observations

Auke Slotegraaf

2009 February 27/28

Sutherland (Huis Lana)

"Bertha" 12-inch f/4.8 Dobsonian (EP: 32mm, 25mm, 10mm, 6.3mm Plossls, 2x Barlow, 32mm Erfle)

Conditions: Clear, dark.

A very small, moderately bright, grey circle. Not much detail is visible in this planetary, which appears as an evenly illuminated, round, 0.3' disk, edges quite sharply terminated. At times, it is apparently oval, but direction uncertain. Rather disappointing, really! (MSA 944)

2009 January 25

Sutherland (Huis Lana)

"Bertha" 12-inch f/4.8 Dobsonian (EP: 32mm, 25mm, 10mm, 6.3mm Plossls, 2x Barlow, 32mm Erfle)

Conditions: Clear, dark.

"Bertha" is set up on Ed's front lawn inside the "Theatre", a wooden frame, 2 metres tall with a footprint of about 3 x 2.5 metres. Black drapes hang all the way around, so inside its as dark as its going to get. In a breeze, the wooden supports creak slightly as slack in the drapes take up wind, bulging then flapping lethargically. No other sounds intrude, and although I've never been on an old sailing ship, this is pretty much what I expect it will sound like.

High overhead floats Argo Navis, and one corner of its sails is marked by Alsuhail (lambda Velorum). About a degree away drifts NGC 2792. Even at low power it is visible, as a bloated star. Bumping up the magnification to 150x shows a round or slightly elongated (SE-NW) glow, 22 arcseconds across, with a smooth, featureless, disk. To the south-east is a double star (TYC 7686-01226-1 & TYC 7686-01150-1).

1998 February 24

1998-02-24/25, 6-inch f/8.6 Newtonian, Stellenbosch Rifle Range site. 6.0 (naked eye), seeing very good. Just north-east of Lambda Velorum. In the sweeper, the planetary is readliy seen as an 11th mag star on a rich field of mixed magnitudes. Within the K9 field, 15 arcmin across, the planetary lies midway between two 95mag stars (one north-west, one south-east). Midway between the pale round disk and one of the 95 mag stars is a small double star; the planetary is half the size of the separation of this double.

1998 February 23

1998-02-23/24, 6-inch f/8.6 Newtonian, Stellenbosch Rifle Range site. 6.0 (naked eye), seeing very good. Easy starhop north-east of lambda Velorum. Examined in various powers, which show a clear round disk, with no detail.

1998 February 18

1998 February 18/19, Stellenbosch Rifle Range site, 11x80 tripod-mounted. 5.8 naked eye. Not found.

1998 January 21

1998 - 01 - 21, 22:00 11x80 tripod, 6.0 naked eye, Paradyskloof Rifle Range (Stellenbosch) Carefully examined the field and precisely located the position; can see the 9th mag star to the north-west (shown on U2), as well as a fainter star closer to the plneb south-east (which in not on the map), but nothing at the planetary's position.

1995 May 30

1995-05-30: 11x80.Technopark. 21:30 SAST. Hazy sky. Examining the exact spot, not seen.

Magda Streicher

(no date)

Alldays (22.50S, 20.12E, 770m).

12-inch f/10 SCT (218x, 346x)

It is a small round quite outstanding haze. The middle star can be seen with care. Consider its Magnitude however it is an easy seen object. A very busy star field around the planetary from north al the way around to south. The western field is bare in starlight. Towards SE more or less 3' away a nice 11Magnitude yellow double star can be seen.

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.