James Dunlop's Deep Sky Objects

[glenc]

Alexander suggested a thread called Dunlop Month. Here it is.
James Dunlop cataloged clusters and nebulae from his backyard in Parramatta in 1826.
He was the second person to make a catalogue of southern deep sky object (DSO).
Nicolas-Louis de La Caille made the first catalogue in 1751-52 from Cape Town with a half inch refractor.
James Dunlop built his own 9" speculum reflector and found five times more objects than Messier. Messier used 7.5" and 8" reflectors.
Unfortunately Dunlop has been ignored over the years. He was a great observer.
Prior to 1840, William Herschel, John Herschel and James Dunlop discovered most of the NGC objects.
This IIS thread includes 172 Dunlop objects outside the Magellanic Clouds.

[glenc]

These 4 Dunlop objects transit at about 10pm (11pm DST) in November.
All the Dunlop objects are visible in a 6" reflector.

Name Type Con Mag, Size
NGC 362 GC Tuc 6.8, 12.9'
IC1633 Gxy Phe 11.4, 2.6'
NGC 613 Gxy Scl 10.1, 5.5'
NGC 986 Gxy For 11.0, 3.9'

[glenc]

The attached file is an 11 page biography of James Dunlop.
It is a chapter from a PhD thesis with the images removed so that the file is not too large.
Here are some pictures of Dunlop and Rumker http://picasaweb.google.com/dunlop1826/DunlopRumker#

[glenc]

The attached list contains 172 Dunlop DSO.
It can be opened with MS Excel or similar programs.

The columns in the spreadsheet are:
Dun, NGC/IC, Notes, Type, Const, Vmag, Size, RA 2000, dec, Month @ 10pm
Dun - Dunlop number
NGC/IC number
Notes - there were some copy errors when the typed catalog was made.
Type - OC, GC Neb, Dark neb, PN, MW patch, Gxy
Constellation
Vmag - Visual magnitude
Size in arcmin (arcsec for PN)
RA - Right Ascension for 2000
declination
Month when the object transits at 10pm (11pm DST)

[glenc]

Sixteen of Dunlop's open clusters are not NGC or IC objects.
They are from:
Mel: Melotte (1915)
Tr: Trümpler (1930)
Cr: Collinder (1931)
Mrk: Markarian (1951)
Lynga (1964)
Ru: Ruprecht (1966) and
H: Harvard (1979)
Dunlop actually found these OC first, before they were listed in the above catalogs.

[glenc]

Here are 104 images of Dunlop objects with his descriptions.
http://picasaweb.google.com/dunlop1826/Dunlop28#
Most images are 28' by 28' but some have a wider field.

[glenc]

The attached SkyMapPro map will help you find 3 of the November Dunlop DSOs. IC 1633, NGC 613 and NGC 986.
The map is about 26 degrees high and shows the sky at about 10pm DST in early November.

[bartman]

Thats a lot of info in 24 hrs!
Cool!
still sifting through it...
At first I thought it was a new nebula that looked like a tyre or tyre tread!!!!!:lol::lol::lol::lol::lol: :lol::lol:
Sorry hehehehe
Bartman

[Lismore Bloke]

That's a good idea Glen. It really deserves a thread of its own.
Just wondering who would qualify as a "suitably qualified second party" if there was no astronomy club nearby. I hereby promise to keep the Argo off when I start on the list!!

[glenc]

I'll be happy to check your list Paul!
I compared 4 Dunlop galaxies this morning with a 12" scope and 8mm EP (190x, 25' field).
From brightest to faintest they were: N613, N986, N625 and IC1633.
The first three are elongated and the first two have bright cores.
IC1633 is vF and vS. Is it visible in a 6"? Images are at http://picasaweb.google.com/dunlop1826/Dunlop28#
The GC N362 is vB and vL. It is resolvable even at the core.
I also saw a fantastically bright meteor moving vertically down near beta Ceti and I looked at Comet Hartley.
The comet is easy to see in a 50mm finder and is about 15' in diameter in the 12" scope using an 8mm EP.

[glenc]

I was planning to have a new thread each month but it didn't work out.
(http://www.iceinspace.com.au/forum/showthread.php?p=655833#post655833)

[glenc]

The rich, well educated, upper class astronomers in England were critical of Dunlop in his day.
Dunlop was a poor, uneducated, lower class Scot.
But I have to admire Dunlop after looking at some of his faint galaxies.

[glenc]

Alex (alexch) looked at NGC 986 with a 22" and said it "was a beautiful sight - a distinct letter "S" with two arms extending out"
http://www.iceinspace.com.au/forum/showthread.php?t=66774&highlight=ngc+986

[glenc]

Dunlop DSO for December
21 of the 172 Dunlop DSO transit at around 10pm in December. (11pm DST)
The first is a GC the other 20 are galaxies.

NGC Type Con Vmag, Size (arcmin)

1261 GC Hor 8.3, 6.9
1269 Gxy Eri 8.5, 11.1, also known as NGC1291
1313 Gxy Ret 9.2, 9.1
1316 Gxy For 8.5, 12.0
1317 Gxy For 11.2, 2.8
1350 Gxy For 10.7, 5.2
1365 Gxy For 9.6, 11.2
1380 Gxy For 10.2, 4.8
1433 Gxy Hor 10.1, 6.5
1487 Gxy Eri 11.9, 2.0, Dunlop's faintest galaxy
1493 Gxy Hor 11.4, 3.5
1512 Gxy Hor 10.6, 8.9
1515 Gxy Dor 11.4, 5.2
1527 Gxy Hor 11.0, 3.7
1532 Gxy Eri 10.6, 11.1
1543 Gxy Ret 10.3, 4.9
1553 Gxy Dor 9.4, 4.5
1559 Gxy Ret 10.7, 3.5
1566 Gxy Dor 9.8, 7.0
1617 Gxy Dor 10.7, 4.3
1672 Gxy Dor 10.2, 6.6

[glenc]

The 3 attached SkyMap Pro maps will help you find the Dunlop December DSO.
Map a shows Canopus and Achernar.
Map b shows the Fornax galaxy cluster. The 3 bright stars near 1436 are f, g & h Eri. (left, top, right)
Map c shows the bright star alpha Dor below 1617 and alpha Ret near 1559.

[glenc]

Attached is a list of James Dunlop's objects with spaces to fill in your observations and guidelines for an award.

[mental4astro]

This is remarkable work you are carrying out here, Glen.

I think that this would be worthy of a combined Imaging and Obs. Challenge effort to put the spot light on Dunlop's work. Maybe shot off a PM to DavidTrap who organises the DSO imaging Challenge.

There is so much material. Surely a shared theme is possible. Would almost be like the current Arp galaxy book where amateurs have photographed the Arp galaxies. Only it would be the "Dunlop Catalogue".

Mental.

[glenc]

NGC 1261, Dun 337, JH 2517
GC in Hor, mag 8.3, size 6.9’, RA 3.204, dec -55.20
Distance 53,500 light years

This GC seems brighter than mag 8.3 to me (GC)
NGC 1261 is 13 deg east of Achernar, see maps a and c in post 15.
Other GC at this time of the year are: NGCs 104, 288, 362, 1851, 2298

Descriptions
On 28/9/1826 Dunlop discovered NGCs 1261 (at ~2:40am), 1433, 1527 and 1553 (at ~3:45am)
Moonrise (18%) was 3:00 am and astro-twilight 4:15 am. (not DST)
(Parramatta house was at latitude 33.82S and longitude 151.00E)
Dunlop 337 “A very bright round nebula, about 1.5’ diameter, pretty well defined and gradually bright to the centre. A small star north following.” [star mag 9.1]
http://picasaweb.google.com/dunlop1826/Dunlop28#5356128570659595186

John Herschel (JH) 2517: 5/12/1834 "bright; large; irregularly round; 2.5' diameter; all resolved into equal stars 14 mag.
Has a star 9th mag 45 N.f. 3' distant." [m9.1, pa 54, 3.6’]
His second observation recorded it as "pretty bright; round; very gradually brighter in the middle; 3' across; resolved into stars of 15th magnitude. A very faint nebula (??) precedes." [there is no nebulae preceeding, GC]

Hartung notes: “This well condensed globular cluster lies in a fine field; 30cm resolves it into crowded stars right to the centre. It is about 2.5’ across and the scattered outliers do not extend far; the stars are however very faint and hard to detect with 20cm although the cluster looks granular. It is a fine bright object, conspicuous with 10.5cm.”
See Auke Slotegraaf http://www.fortunecity.com/roswell/borley/49/u419.htm#NGC1261 (http://www.fortunecity.com/roswell/borley/49/u419.htm#NGC1261)

IIS image by Scott tornado33 (http://www.iceinspace.com.au/forum/member.php?u=97) (2007)
http://www.iceinspace.com.au/forum/showthread.php?t=25027&highlight=1261
http://www.iceinspace.com.au/forum/attachment.php?attachmentid=33371&d=1192831138
The bump of stars on the left, NW side is visible in a 12”. (GC)

Image from Chile by Daniel Verschatse
http://www.astrosurf.com/antilhue/ngc1261.htm

[glenc]

NGC 1553, Dun 331, JH 2630
Gxy in Dor, mag 9.4, size 4.5’, RA 4.270, dec -55.78
Distance 70 million light years? (the average of 5 measurements is 47.7 Mly)

Discovered by Dunlop on Thursday 28/9/1826 at about 3:45am
Located 2d 37m west (pa 252) of mag 3.3 alpha Dor
See map c in post 15
Nearby galaxies include NGCs 1549, 1566 and 1617

Dunlop’s Description Dun 331 [his 9" scope was equivalent to today's 6"]
28/9/1826 “A rather bright nebula about 1’ diameter, very faint at the margin, gradually bright to the centre: a small star north, and another south, both involved in the margin of the nebula. A group of very small stars north.”
http://picasaweb.google.com/dunlop1826/Dunlop28#5356128857259884818
http://picasaweb.google.com/dunlop1826/Dunlop28#5356358827906396482

Note. In Dunlop’s printed catalogue the RA was out by 1 hr but the RA is correct in his notes.
He missed NGC 1549 which is next to NGC 1553. I think this was because his scope probable had dew on it at the end of the mornings observing run.
The notes are available on microfilm from the national library in Canberra. Reel M 1709
http://catalogue.nla.gov.au/Record/746633?lookfor=James%20Dunlop%20ast ronomer%20%23

John Herschel’s Description JH 2630: [his 18.5" scope was equivalent to today's 16"]
5/12/1834. vB, R, gmbM, 60", between 3 stars;
6/12/1834. B, R, in a triangle formed by 3 stars

See http://x.astrogeek.org/articles/article.php?article_id=2
for an explanation of Herschel's abbreviations.

Hartung’s Description
“In this field are two bright nebulae [NGC 1549 and NGC 1553] about 13’ apart . . one is round, about 1.5’ across with very bright nucleus; the other is elliptical, about 2’ x 0.8’ in pa 150 deg, strongly concentrated and even brighter. 7.5cm shows these nebulae plainly.”
http://www.fortunecity.com/roswell/borley/49/u420.htm#NGC1553

Visible in 20x80 binoculars (GC)

IIS image by Steven (sjastro)
http://users.westconnect.com.au/~sjastro/ngc1549_53.html (http://users.westconnect.com.au/%7Esjastro/ngc1549_53.html)
http://www.iceinspace.com.au/forum/showthread.php?t=31073&highlight=1553

X ray image
http://chandra.harvard.edu/photo/2002/1058/

[glenc]

NGC 1350, Dun 591, JH 2545
Gxy in For, mag 10.7, size 5.2’, RA 3.519, dec -33.62
Distance 73.5 Mly, average of 2 measurements

James Dunlop found NGC 1317 and NGC 1350 on the night he finished observing for his catalogue, 24/11/1826.
He started his catalogue just 7 months earlier on 27/4/1826.
Messier took much longer to catalogue 103 objects; he started his catalogue in 1758 and completed it 23 years later in 1781.

NGC 1350 is only 2 degrees NNW of the sickle shaped Fornax galaxy cluster
http://picasaweb.google.com/dunlop1826/Dunlop28#5356128690730218434
See map b in post #15

Here is an image and descriptions of 1350 by Dunlop and John Herschel.
http://picasaweb.google.com/dunlop1826/Dunlop28#5356128647881832354
The image is from www.wikisky.org (http://www.wikisky.org)

Hartung's description is here http://books.google.com.au/books?id=EQAYGmZT0o8C&pg=RA1-PA243&lpg=RA1-PA243&dq=ngc+1350+hartung&source=bl&ots=vGejfKi01f&sig=0HjZXWr_1tshi5j8JEgNc1A2WBE&hl=en&ei=rpTlTLWxNIfQcZfEtPwK&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBUQ6AEwAA#v=onepage&q&f=false

There are currently no images of 1350 on IIS.

There is an APOD image http://apod.nasa.gov/apod/ap051006.html (http://apod.nasa.gov/apod/ap051006.html)
The Fornax galaxy cluster is about 60 Mly away.

The attached wikisky.org image, with north at the top, is 3.8 by 3.8 degrees.
It shows NGC 1350 near the top and 1365 near the bottom.

[glenc]

James Dunlop catalogued 629 clusters and nebulae.
165 were in the LMC, 59 were in the SMC and
405 were outside the two Magellanic Clouds.
If you had to catalogue 405 NGC and IC objects south of declination -28 degrees what would you include?
All of these non Magellan Cloud clusters, nebulae and galaxies must be visible in a 6" Newtonian telescope. (magnitude less than about 12)
The revised NGC/IC data is here http://www.klima-luft.de/steinicke/ngcic/ngcic_e.htm

[glenc]

I had a try at picking 405 NGC and IC objects south of dec -28.

The attached MS Excel file contains:
106 OC, 40 GC, 14 Neb, 19 PN and 226 Gxy

Reference http://www.klima-luft.de/steinicke/ngcic/ngcic_e.htm

[glenc]

Dunlop DSO for January
6 of the 172 Dunlop DSO transit at around 10pm in January. (11pm DST)
The galaxies NGCs 1792 & 1808 are only 40' apart.

NGC Type Const Mag, Size (arcmin)
1792 Gxy Col 10.2, 5.2
1808 Gxy Col 10.0, 6.5
1851 GC Col 7.1, 11.0
2090 Gxy Col 11.3, 4.9
2243 OC CMa 9.4, 5.0
2298 GC Pup 9.3, 6.8

[glenc]

This SkyMapPro map shows five of the Dunlop January DSO.
It also shows the two brightest stars, Sirius and Canopus.
The map is 26 degrees high with north on the left.

[glenc]

There is an image of the galaxy pair NGC 1792 & NGC 1808 at http://picasaweb.google.com/dunlop1826/Dunlop28#5356358844115852706
After that there are 28' by 28' wikisky.org images of NGCs 1792, 1808, 1851, 2090 and 2298.

[glenc]

Seven Dunlop open clusters transit in February.
The best two are NGCs 2477 and 2547.

NGC Type Const Vmag, Size (arcmin)
2477 OC Pup 5.8, 27.0
2489 OC Pup 7.9, 8.0
2547 OC Vel 4.7, 20.0
2546 OC Pup 6.3, 41.0
2658 OC Pyx 9.2, 12.0
2671 OC Vel 11.6, 4.0
Trump 10 OC Vel 4.6, 15.0

[glenc]

NGC 2477 and NGC 2451 remind me of M46 and M47. I looked at them last night with a 12" Dob.
I also looked at NGC 2547 - I love the hot bright blue star gamma Vel nearby. It is part of a T shape with 4 stars in it.

[Derek Klepp]

Gday Glen just got onto your posts and have listed a few for observation.As a relative newcomer to Astronomy I find there is a definite lack of Southern Hemisphere info in all the Magazines .Even the Aus version except for Les's column.Generally I observe with a 10" sct then follow that up with live views with a Gstar video camera on the fainter objects which basically doubles the aperture.However the real view is always more rewarding.Each year however I am able to see more through the eyepiece as my skills develop.Thanks for info it will be good to observe these objects .
Derek

[glenc]

Thanks Derek. Using the GStar sounds interesting.

[glenc]

Nineteen Dunlop objects transit at about 10pm in March.
12 OC, 2 GC, 3 Neb, 1 PN and 1 Gxy.

Name Type Con Vmag, Size (arcmin)
Mrk18 OC Vel 7.8, 2.0
2808 GC Car 6.2, 13.8
2818 PN Pyx 11.6, 35" (OC & PN)
IC2488 OC Vel 7.4, 18.0
2972 OC Vel 9.9, 4.0
2982 OC Vel -, 12.0
Ru95 OC Cen -, 5.0
2997 Gxy Ant 9.6, 8.9 (found by William Herschel)
3114 OC Car 4.2, 35.0 (snail shaped OC)
3199 Neb Car -, 22.0
3201 GC Vel 6.9, 18.0 (the PN 3132 is 6 deg north)
3228 OC Vel 6.0, 5.0
Tr13 OC Car 11.3, 5.0
3293 OC Car 4.7, 6.0
3324 Neb Car -, 5.0
3330 OC Vel 7.4, 6.0
Mel101 OC Car 8.2, 15.0 (near IC2602)
3372 Neb Car 3.5, 120.0 (eta Car)
Tr17 OC Car 8.9, 5.0

[glenc]

Here is an image of NGC 2818.
https://picasaweb.google.com/dunlop1826/Dunlop28#5356130563945937762

Dunlop described it as "D564. A pretty large faint nebula of a round figure, 6' or 8' diameter; the nebulosity is faintly diffused to a considerable extent. There is a small nebula in the north preceding side, which is probably a condensation of the faint diffused nebulous matter; the large nebula is resolvable into stars with nebula remaining."

[glenc]

NGC 3199 is one of my favourite objects. A UHC filter improves the view.
Here is an image of it: https://picasaweb.google.com/dunlop1826/Dunlop28#5356130706017812050

Dunlop's declination was out by 1 degree but his description and diagram were accurate. "D332. A very faint ray of nebula, about 2' broad, and 6' or 7' long, joining two small stars at the south following extremity, which are very slightly involved, but their lustre is not diminished from that of similar small stars in the field. The north extremity also joins a group of small stars, but they are not involved."

[glenc]

Here are two articles about Dunlop.

1. James Dunlop's historical catalogue of southern nebulae and clusters
http://eprints.jcu.edu.au/10919/1/10919_Cozens_et_al_2010.pdf

2. Early Australian Optical and Radio Observations of Centaurus A ( I wrote the visual discovery bit)
http://www.publish.csiro.au/?act=view_file&file_id=AS09071.pdf

[mental4astro]

Hey Glen,

2818 took me quite some time to pin from my home in Sydney. The open cluster that sits in its line of sight is soooo underwhelming, which is why I kept missing it. I was first looking for the cluster (like with M46). It was only by chance that I finally caught a glimpse of the PN that I was able to nail it.

I must say though, I now doubt I was actually looking at the open cluster. The image whose link you've uploaded, is so much more compact, yellow and with fainter component stars. I think I was just seeing stars that just lie in the line of sight. Hmmm. Another for closer examination from a dark site.

The planetary nebula itself is a faintly detailed one. Remember I was viewing from my home, so what structure there is was rather washed out, even with an OIII filter. But there is some.

I've included my sketch of it that also appears in my most recent Obs. thread about 'shooting the breeze'.

Mental.

[glenc]

Thanks Alexander for the sketch. Dunlop saw it from Sydney too but there was less light pollution 185 years ago!

[Paddy]

Thanks for the list Glen. It will be very interesting to hunt them down!

[glenc]

I have been away for 12 weeks and failed to update this list.
Thirty Dunlop objects transit at about 10pm in June or 8pm in July, 24 open clusters, 5 globular clusters and a star cloud.

Name Type Const Vmag, Size (arcmin)
5824 GC Lup 9.1, 6.2
5823 OC Cir 7.9, 12.0
5927 GC Lup 8.0, 6.0
5986 GC Lup 7.6, 9.8
5999 OC Nor 9.0, 3.0
6005 OC Nor 10.7, 3.0
Tr 23 OC Nor 11.2, 9.0
6025 OC TrA 5.1, 12.0
6031 OC Nor 8.5, 2.0
6067 OC Nor 5.6, 12.0
6087 OC Nor 5.4, 12.0
Norma star cloud, length=180.0'
6115 OC Nor 9.8, 3.4
6124 OC Sco 5.8, 40.0
6101 GC Aps 9.2, 10.7
6139 GC Sco 9.1, 5.5
6134 OC Nor 7.2, 6.0
Ru 119 OC Nor 8.8, 8.0
6167 OC Nor 6.7, 7.0
Cr 307 OC Ara 9.7, 5.0
6192 OC Sco 8.5, 7.0
6193 OC Ara 5.2, 14.0
6204 OC Ara 8.2, 5.0
6222 OC Sco 10.1, 4.0
6208 OC Ara 7.2, 15.0
6216 OC Sco 10.1, 4.0
6231 OC Sco 2.6, 15.0
6249 OC Sco 9.7, 3.0
6242 OC Sco 6.4, 9.0
6253 OC Ara 10.2, 5.0

[glenc]

The following 27 Dunlop objects transit at about 10pm in July or 8pm in August. There are 9 OC, 16 GC and 2 PN.

Name Type Const Vmag, Size (arcmin)
6259 OC Sco 8.0, 10.0
M62 GC Oph 6.4, 14.0
6268 OC Sco 9.5, 6.0
6281 OC Sco 5.4, 8.0
6318 OC Sco 11.8, 5.0
6316 GC Oph 8.1, 4.9
6326 PN Ara 11.1, 15 arcsec
Tr 25 OC Sco 11.7, 8.0
IC 4651 OC Ara 6.9, 10.0
6352 GC Ara 7.8, 7.1
6362 GC Ara 8.1, 10.7
6388 GC Sco 6.8, 8.7
M 6 OC Sco 4.2, 25.0
6400 OC Sco 8.8, 12.0
6397 GC Ara 5.3, 25.7
6444 OC Sco, --, 12.0
6441 GC Sco 7.2, 7.8
6496 GC Sco 8.6, 6.9
6541 GC CrA 6.3, 13.0
6563 PN Sgr 10.8, 54 arcsec
6569 GC Sgr 8.4, 5.8
6584 GC Tel 7.9, 7.9
M69 GC Sgr 7.6, 7.1
6652 GC Sgr 8.5, 3.5
M70 GC Sgr 7.8, 7.8
M54 GC Sgr 7.7, 9.1
6723 GC Sgr 6.8, 11.0

[glenc]

The following 5 Dunlop objects transit at about 10pm in August or 8pm in September.
There are 2 GC, 2 Gxy and the dark nebulae Dunlop 559 near the GC NGC 6723 .

Name Type Const Vmag, Size
Bernes 157 Dark CrA --, 80.0'
N6744 Gxy Pav m8.8, 20.0'
N6752 GC Pav m5.3, 20.4'
M55 GC Sgr m6.3, 19.0' (found by Lacaille)
N6861 Gxy Tel m11.2, 2.8'

Images with 28 arcmin fields are at https://picasaweb.google.com/dunlop1826/Dunlop28
Jason Jennings (Jase) has an image of Dunlop 559 (Bernes 157) at http://www.cosmicphotos.com/gallery/image.php?fld_image_id=106&fld_album_id=11

[Gem]

Looking at my logbook of the past week, I note that I have observed NGC 6744 (an obvious large smudge!!), NGC 6752 (amazing how bright some of its stars are), and M55 (similar to M22 but the field isn't as rich). I'll go try the other two when the cloud clears.
All these have been quite easy with a 9.25" in the suburbs of Canberra. :)

Last night I printed out a list of the 60 brightest GC in the sky and noted that I had observed 44 out of 60 of them. So I then proceeded to find 10 that I had somehow missed (or not recorded)... Now at 54 out of 60. The only one in the top 40 I am now missing is M92 - which will be too hard from the ACT...

[glenc]

Well done Grant. M92 transits at 8:40pm and is 12 deg up in Canberra.

[Gem]

No hope when you live in medium density housing with lots of trees thrown in for good measure!! At least I caught M13 with the ol' dob when I lived in QLD back in the 90's. I have a good view south and a good view west, but nothing below 15 degrees even in those directions. :)

[glenc]

I had a look at these 5 objects last night with my 12" Dob.

D559 this large dark nebula is easily seen at low power.
N6744 Galaxy has a bright core in a large ill-defined area
N6752 magnificent, the 3rd brightest globular
M55 this globular has a bit missing, like it is being eclipsed
N6861 Galaxy is faint and small, next to two mag 12 stars

Dunlop's position for N6861 is 16.4' away in pa 280.
Maybe he saw N6868 not N6861 but 6868 is 42' from Dunlop's position.
N6868 is brighter than 6861 by about 0.5 mag.

The wikisky.org image below (field 56') shows 6868 left and 6861 right.
N6851 (not in image) and N6870 (above 6868) were also seen last night.

[glenc]

I have updated this web page with more wikisky.org images and more Dunlop descriptions.
https://picasaweb.google.com/110048826379679252146/Dunlop28

It nows includes 150 Dunlop objects
57 galaxies
35 globulars
27 open clusters
3 bright nebulae
3 planetary nebulae
2 dark nebulae and a star cloud
also
16 LMC objects
6 SMC objects

[glenc]

I looked at 65 Dunlop objects last night with my 12" Dob, starting with NGC 3766 and working through to NGC 7793.
I missed the ones that were nearly overhead, they are too hard to find with a straight through finder.
The attached file lists all the Dunlop 150. Those marked 18 Aug were seen last night.

[Gem]

Do you sleep at all??? :)

[glenc]

It only took a couple of hours, 7pm to 9pm. Clouds came in at 9pm.
I used SkyMapPro and a 10" Netbook to find the ones I didn't already know.

[Zubenel]

Thanks for the picasa web link .I will definately use it.

[glenc]

Most of Dunlop's Deep Sky Objects are on Taki's star charts
http://www.geocities.jp/toshimi_taki/

There are 12 charts to mag 6.5.
He also has a mag 8.5 set of charts with 146 pages

This is an amazing resource.

[glenc]

The galaxy NGC 5643 (D469) and the PN IC 4406 make an interesting pair.
James Dunlop found 5643 on 10 May 1826, but both Dunlop and John Herschel missed the easy PN IC 4406.
The PN is 1.8 deg west (to the right) of the 5643.

Here is an image.
http://www.wikisky.org/?ra=14.453120275310267&de=-44.25089568478503&zoom=7&show_grid=1&show_constellation_lines=1&show_constellation_boundaries=1&show_const_names=0&show_galaxies=1&img_source=DSS2

[glenc]

Last night I saw 60 additional Dunlop objects, there are 25 more for me to see from the Dunlop 150 list.
The dew was heavy after midnight.

[Gem]

60 in one night!!?! :eyepop:
I just checked the 150 list myself... I have seen only 56 of the 150... and that is over a life time not one night!
Some work to do for myself.... :)

[glenc]

It helps to have 6 DSO in the SMC and 16 in the LMC.
In a Messier Marathon they see 110 M objects in one night.
Maybe we could have a Dunlop marathon.