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:

Lacaille I.13 (15,736 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

Lacaille I.13

Lacaille I.13, Dunlop 69, NGC 6777, GC 4484

RA: 19h 27m 15s
Dec: −71° 34′ 55″

Con: Pavo
Ch: MSA:1530, U2:456, SA:26

Ref: [1755MmARS..??..194L ], Cozens PhD 2008

(reference key)

Type: stars (two)

Mag: B=?, V=?

Size: ?
PA: ?

Remarks

Lacaille I.13 is taken to be the two stars HD 181464 (SAO 257686; V=8.3, 19h 26m 44.66s, -7127'57.9") and HD 181354 (SAO 257685; V=8.0, 19h 26m 19.90s, -7127'57.4").

Wolfgang Steinicke (Historic NGC 2009) lists it as two stars, and Glen Cozens (2008) lists it as an asterism, "2 stars 8th to 9th magnitude".

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

NGC 6777 may be NGC 6752 (first suggested by Owen Gingerich in a Sky and Telescope article which appeared in the February 1960 issue on page 207). If so, there is a large error in Lacaille's position.

Much closer to his position is a fairly close pair of 9th magnitude stars, SAO 257685 and 257686. These were mentioned by Delisle Stewart in his Harvard Annals 60 list, and were subsequently picked up by Andris Lauberts for ESO-B. Would these two stars look like "the nucleus of a small comet" in the eyepiece of Lacaille's half-inch aperture quadrant? Perhaps. But I like Gingerich's idea a bit better.

Historical observations

Lacaille (1755)

Lacaille's J2000.0 position is 19h 27m 15s 71 34' 55".

His description reads: "It resembles the preceding" i.e. "It resembles a small nucleus of a faint comet."

Dunlop, James (1827)

Dunlop 69 is recorded as "(43 Pavonis, Bode's Catalogue.) I cannot find the nebula answering to this place: perhaps there may be a mistake in the right ascension."

Published comments

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

NGC 6777: Table IV: Not seen, 2 * nr magn 8 or 9, but no neb.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a galaxy.

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.