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 2090 (3,946 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 2090

NGC 2090, Dunlop 594, AM 0545-341, ESO 363-23, LEDA 17819, MCG-06-13-009, SGC 054514-3416.1, h 2944, GC 1288

RA: 05h 47m 2.3s
Dec: −34° 15′ 5″

Con: Columba
Ch: MSA:395, U2:359, SA:19

Ref: SIMBAD

(reference key)

Type: galaxy, Sb

Mag: B=11.85, V=?

Size: 5.754′ x 2.754′
PA: 13°

Historical observations

Dunlop, James (1827)

James Dunlop discovered this galaxy from Paramatta, New South Wales, and included it as No. 594 in his catalogue of 1827. Using a 9-inch f/12 telescope, he described it as "a small faint nebula, with a ray shooting out on the north side."

John Herschel (1847) Cape Observations

Observed by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "globular cluster, bright; round; with an appendage to northward; 2.5' diameter." During the next sweep, he saw it as "bright, irregularly round, gradually brighter in the middle; 3' long; 2' broad with stars appended."

NGC/IC Dreyer (1888, 1895, 1908)

The NGC calls it "globular, bright, pretty large with an irregular figure, gradually becoming brighter towards the middle."

Published comments

Hinks, A.R. (1911)

Hinks, A. R. (1911) On the galactic distribution of gaseous nebulae and of star clusters. MNRAS, 71(8), 693-701.

List 6: "NGC numbers of clusters classed as globular, not in Bailey's catalogue"

Bailey, S.I. A catalogue of bright clusters and nebulae. Ann.Harv.Coll.Obs., 60(8), 199.

Stewart (1908) Ann.Harv.Coll.Obs., 60 (6)

Table IV: As in NGC, but not a cl, cE at 10deg, stell.N.

Helwan Obs. Bulletin No 21 (1920)

pF, 2'x1', E 10, spiral with nucleus surrounded by small compact portion and fainter outer convolutions.

Charlier, C.V.L. (1931)

Charlier, C V L (1931) "Stellar clusters and related celestial phaenomena", Lund Annals 2, 14, No. 19. Charlier examined prints from the Franklink-Adams atlas; "Table 6 gives a list of those objects in Bailey's catalogue for which the globular character is uncertain or not probable..."

NGC 2090 Remarks: "pB, * N, globular ?"

Stewart

By examining photographic plates, Stewart found that it was not a globular cluster; it had a stellar nucleus and was considerably extended in PA 10 degrees.

Photo index

by Jim Lucyk: Cat.of South.Peculiar Gal.and Ass. Vol 2 (Arp&Madore, 1987) p11.9.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 12.0 mag galaxy. Their coded description reads E,EL,BM.

Modern observations

Tom Lorenzin

Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12.4M; 2.5'x 1' extent; soft ellipse with little brighter center; requires great S sky; 1.5 degrees E and a little S of 2.5M Alpha COL."

Steve Coe

Steve Coe, using a 13" f/5.6, notes: "Pretty bright, pretty large, little elongated 1.2 X 1 in PA 20, somewhat brighter middle at 100X."

Brian Skiff

POSS: 1) gx in pa15. br *s N, not S. * on W edge of halo. 2) m~13.5 *s N &

NE: first is @ 1'.37, W of maj axis; second @ 2'.00 nr maj axis;

third 2'.48 NE. m13.5 * 0'.56 SW; m14.0 * 1'.10 SE. implies 15cm

size ~3'.6x1'.0.

ESO: pa13.

L&deV: * 1'.3 N: V=14.10/0.66; * 0'.56 SW: V=13.66/1.09.

15cm - br @ 50x. 140x: among sev m12.5-13.5 *s, 5'x1'.5 elong pa20. halo lentic

and seems to extend farther NNE than SSW. brtst of five nrby *s is just

off W side of maj axis nr N end---gx seems to extend past this * to nr

second * here somewhat farther away; third * of arc off NE. m13 * SW of

center off halo. m13.5 * SE. core oval and 10" nuc nrly circ. mod-strong

even concen. BS, 17Feb1990, LCO.

25cm - elong N-S. two m12.5 *s on S, a f one just W of nuc m14? others nrby.

2'.5x1'. core mod br w/f wisp suspected extending S through *s. BS.

Contemporary observations

Magda Streicher

(no date)

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

12-inch f/10 SCT (218x)

This is a soft large oval galaxy, elongated in a N to S direction, a strong nucleus and flimsy edges that fade away. It shows three outstanding stars in formation curl away from inside the galaxy to the east. Slightly further away east another more prominent string forms a half moon shape. The southern side is more defining. I estimate it 6x2, few splinter stars embedded inside. Busy northern star field.

Richard Ford

2012 February 19, Sun

Location:Perdeberg.

Instrument:12-Inch Dobsonian Reflector Telescope.

Time:00;52.

Sky Conditions:The fainter parts of the Milky Way are barely visible.

Transparency Of the Sky:Haziness only visible on the horizon.

Seeing:Atmosphere stable with little interference.

This galaxy has an elongated shape which is well defined.This galaxy's nucleus is centrally concentrated and is seen as a faint smudge of light at 75*.Around this galaxy I have also noticed some areas of uneven brightness lit up by the light of this galaxy.From the nucleus of this galaxy I have found that the nucleus grows brighter compared to the outskirts of this galaxy.

It measures 3.8'*1.2'.

Challenge Rating:Difficult.

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.