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NGC 2419 (4,763 of 18,816)

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Intergalactic Wanderer

NGC 2419, C 0734+390, GCl 12, Caldwell 25, Intergalactic Wanderer, I 218, h 457, GC 1548

RA: 07h 38m 8.51s
Dec: +38° 52′ 54.9″

Con: Lynx
Ch: MSA:108, U2:100, SA:5

Ref: SIMBAD, Archinal&Hynes (2003), SEDS

(reference key)

Type: globular cluster

Mag: B=?, V=10.3

Size: 4.6′
PA: ?

Historical observations

William Herschel (c.1784)

Synonyms: H I-218

Discovered in 1788 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "cB, R, vgmbM, about 3' diameter."

Birr Castle/Lord Rosse

In the mid 1800's Lord Rosse decided it was a globular cluster. At a distance of 300,000 light years, it lies twice as far as the LMC, drifting through intergalactic space, hence the nickname "The Intergalactic Wanderer." At about magnitude 10 it is easy for a 4-inch, and is nice with a 17-inch.

NGC/IC Dreyer (1888, 1895, 1908)

The NGC describes it as pretty bright, pretty large, slightly elongated 90, very gradually brighter towards the middle with a 7.8 mag star 4' away at PA 267 .

Published comments

Shapley, H. (1930) "Star Clusters" Harvard Obs. Monographs No. 2

p16: "An example of a recent addition is the observation at the Lowell Obs., verified at Mount Wilson, that the object NGC 2419... not listed by Melotte, is, in fact, a remote globular cluster in the part of the sky that is otherwise devoid of these systems."

Harris, W.E. (1997)

RA 07 38 08.5 (2000) Dec +38 52 55 Integrated V magnitude 10.39 Central surface brightness, V magnitudes per square arcsecond 19.83 Integrated spectral type F5 Central concentration, c = log(r_total/r_core); a 'c' denotes a core-collapsed cluster 1.40 Core radius in arcmin .35. ["Catalog Of Parameters For Milky Way Globular Clusters", compiled by William E. Harris, McMaster University. (Revised: May 15, 1997; from http://www.physics.mcmaster.ca/Globular.html; Harris, W.E. 1996, AJ, 112, 1487) ]

Photo index

Photo Index by Jim Lucyk: Sky&Tel. 2/80 p178, Sky&Tel. 2/81 p173, Sky&Tel. 9/86 p311, Astronomy mag. 2/85 p38, Deep Sky #10 Sp85 p34, 38, Burnhams V2 p1130.

Sulentic & Tifft (1973)

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

Modern observations

Harrington, Phil (1986)

Harrington, P. (1986) More globulars for observers. Sky&Telescope, Sep, 310.

Visually this object in Lynx would seem a poor choice to be included in a list of the 'finest' globulars. Due to a lack of nearby bright stars, NGC 2419 can prove difficult to find. Furthermore, once located it shines dimly with a total bightness equal only to the light of a single 10th mag star. Even the largest backyard telescope show it as little more than an undefinable glow. Why then is it interesting? When we look at it our gaze is tavelling across some 300,000 light years,, well beyond the limits of most other glboaulrs. Indeed NGC 2419 lies farther away than then Magellanic Clouds.."

Walter Scott Houston

Houston notes "it has a visual mag of 11.5 and is a little less than 2' across. Under good observing conditions the cluster should be visible with a 3-inch telescope. I once saw it from Kansas with a 4-inch refractor stopped down to 2.5 inches and a power of 100x. The cluster should always be within reach of a 6-inch glass, and a 12-inch may start to show some hint of individual stars around its edge."

Hartung, E.J. (1968) Astron.Obj.South.Tel

Hartung calls it "rather faint", seeing it as a diffuse round haze about 1.5' across, "rising broadly to the centre" He also notes nearby stars, mentioning a white star 4' preceding and a wide pair 9' following, "which may serve for identification."

Ancient City Astron.Club (1980)

Listed by the Herschel Club, described as "stands out fairly well, small and dim, some central brightness. 8-inch, 48x."

Steve Coe

Steve Coe (Glendale, Arizona, USA) observing with a 13.1-inch f/5.6 reflector, writes in The Webb Society Nebulae and Clusters Section Report No. 11, January 1993: "Pretty bright, small,with brighter middle (x100). No more detail seen at x200. Nice field."

Tom Lorenzin

Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.5M; 2' diameter; at E end of 7-8M, 2-star chain (SAO 60232-60229); one of the dimmest globs; the "INTERGALACTIC TRAMP"- most distant of the Milky Way's GLOBs; may even be extragalactic at its distance of approximately 200,000 light years."

[amastro] N2419 in First Quarter Moon

N2419 is an interesting object even from my city location with a first quarter moon in the sky. I suspected a grainy appearance at 200x even from this location. Has anyone noticed MegaStar plots a 7.7 magnitude star (GSC 2958:34) at the dead center of this globular? That surely is a big mistake, it contains no bright star. Kent

------------------------------------------------------------------------

There are about a million galaxies and other nonstellar objects in the GSC, even ones marked as "stellar" in the catalogue. As Dave Monet said of early automated star/nonstar algorithms: they were almost good enough to tell the difference between a Big Mac and the box it comes in. Far from being useless, these provide accurate positions for huge numbers of objects; the problem is identifying just which GSC entry corresponds to the center of the object. Brian

------------------------------------------------------------------------

[amastro] NGC 2419 Comparison Images

Entries from my logbooks on NGC 2419:

Observed 4/3/1984 with 8-inch f/6 home-built Newtonian at Rixeyville, VA. Most distant large Milky Way globular. Pretty small, pretty faint, round. Shows a mottled appearance in 7.4mm (162X), there are two 7th mag stars nearby. Observed 3/26/1995 with 14.5-inch f/4.5 Newtonian at Rixeyville, VA. Considerably large, pretty bright, round, with a hint of resolution around the outer edges in 13mm Nagler (127X). Cheers, Geoff

----------

Interestingly, I can quite easily N 2419 with my 25" f/5 in very light-polluted Virginia Beach/Norfolk, VA area. Naked-eye stars = 4.5 at best. In the dark Coinjock, NC skies (6.2 naked-eye) I can begin to resolve it with averted vision. A favorite of mine, I especially like the name, "Galactic Wanderer", or even better, "Galactic Tramp". Kent

----------

Gramer, Lew (IAAC)

(IAAC) ngc 2419 Observer: Lew Gramer Your skills: Intermediate Date and UT of Observation: 1997-10-30/21, 06:15 UT Location: Miles Standish State Forest, MA, USA (41N, elev 30m) Site classification: rural Limiting magnitude: 6.5 (zenith), intermittent cirrus and fog Seeing: 7 of 10 - pretty good, but variable down to 4 Moon up: no Instrument: 20" f/5 Tectron truss-tube dob Newtonian reflector Magnification: 70x, 210x, 420x Filters used: None Constellation: Lyn Data: mag 10.4 size 4.1' RA/DE: 07h38m +38o53m "Readily found by sweeping N from Castor, past the pretty multiple omicron Gem, to two very ORANGE stars mags 5-6 in Lynx, separated NW-SE by just over a degree (HD62647 and HD61294). Just over 0.5o from the NW orange star is a bluish mag 7 pair. n2419 is an irreg- ular, unconcentrated haze at 70x, just NE of this pair. No detail is apparent, and the object intermittently will require averted vision even to be seen. At 210x, some hint of "lobes" in the halo can be seen, and clumpiness begins to appear near the indistinct core as well. At 420x, in moments of excellent seeing, probable stellarings seem to appear at seemingly random points, and there is an apparent brighter concentration of haze just N of center. At such a high power under good conditions, more distinct lobes of haze can be seen in the halo, NW and E of what APPEARS to be a poorly concentrated core. [Surely the joy of viewing this gc lies mainly in the challenge of seeing it, as well as in the knowledge of n2419's bizarre nature: a faint, lonely object drifting away from us at a nearly extragalactic distance of 300,000 light years! For those not blessed with Southern Skies, this is certainly one of the most distant globular clusters visible as extended objects from earth - a lonely wanderer indeed.]"

Paul Alsing

82-inch at McDonald - Observing Report

[amastro] posting, Sat Nov 25, 2006

82" telescope, McDonald Observatory near Fort Davis, Texas, USA

f/13.7, 35mm Televue Panoptic (5' fov, 812x)

The Intergalactic Wanderer is among the 4 or 5 farthest globular clusters in our galaxy, and when viewed with most amateur telescopes no individual stars can be seen. Using 82" of glass I counted 8 or 9 stars in one quadrant, so maybe 3 dozen stars were seen overall. Other than that, just another pretty globular, very uniform in appearance...

Contemporary observations

Tom Bryant

2007-01-20 22:00:00

Observing site: Pinnacles overlook

Telescope: C-8

[7h 38m 6s, 38 53m 0s] A faint glow in the sky, only the faintest hint of granulation.

2011 10 30 4:13:57

Observing site: Little Tycho Observatory

Telescope: C-8

[7h 38m 6s, 38 53m 0s] Glimpsed! A faint smudge subtending a bit under 1/10th of the 18mm field. Harris (2010) gives the diameter as 4.6'. I saw less than half of this diameter, 1/10 of the 18mm field is 2.2'.

2011 5 5 23:25:9

Observing site: Little Bennett Regional Park

Telescope: C-11

[7h 38m 6s, 38 53m 0s] The cluster was mottled in Tom C's 18! Superb.

Richard Ford

2012 March 23rd, Fri

Location:Perdeberg.

Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.

Instrument:12-inch Dobsonian.

This globular cluster stars are irresolvable and is seen as a very faint and diffuse snowball.It is unimpressive in appearance.This globular cluster measures 3.8'* 1.2'.The nucleus of this globular cluster grows slightly brighter compared to the far outskirts of this cluster.

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