PN Hf 39

[glenc (Glen)]

Has anyone seen the planetary nebula Hoffleit 39 = Hf 39 = PK 288-00.1 = PNG 288.9-00.8 in Car?
It is near eta Car. I looked for it last night without success.
The PN is at RA 10h 54m, dec –60d 26.7m and has diam 72” and mag 10.4 (?).
The central star is mag 10.9, the image below is from the red DSS.

[glenc (Glen)]

I looked at 13 PN last night with the 12" at 188 times. Two were very small and the third was faint (see their 5'x5' DSS2 red images below).
The other 10 were easy: IC2448, NCC2867, NGC3132, NGC3211, NGC3242, NGC3699, NGC3918, NGC5189, IC4406, NGC5882

http://archive.eso.org/dss/dss

[ngcles]

Hi Glen,

Nope, haven't seen it and I think it is unlikely that any of us will see the actual nebula given the emission lines it shines at.

This is not a classical PNe like the ones formed at the end of the lives of sun-like low to medium mass stars, but a ring-type wind-blown shell nebula formed from a LBV star.

There is a very detailed paper (using the echellle spectrograph on the AAT) on the properties of this star and the nebula surrounding it here:

http://cdsads.u-strasbg.fr/full/1994A%26A...281..833S

And the writers conclude that the central star should be re-classified as a W11 wolf-rayet star and that it possesses some properties in common with the nearby AG Carinae (which also has a dusty ring).

While the star (at ~mag 11 is certainly observable, the nebula is not really visible (at visual wavelengths). It is a very, very young nebula being only 2x10^4 yrs old

Best,

Les D
Contributing Editor

AS&T

[§AB]

I have resolved Hoffleit 38 into a donut at 288x with my 12", I attempted Hoffleit 39 aswell but didn't see anything.

[GrahamL]

whats the history of the pk catalouge glen ?.. do these objects share an
NGC or IC index as well ? Some of these more obscure objects seem to be equally obscure in there listings as well "for me"... I did look at ngc5189 and a couple of your easy ones last night

[glenc (Glen)]

Graham the PK catalog is
PK --- L. Perek and L. Kohoutek. The 1967 'Catalogue of Galactic and Planetary Nebulae'.

Many Planetary neb do not have NGC or IC numbers.
The PNG catalog contains 1143 PN, only 93 are NGC objects and 34 are IC objects.
PNG --- Planetary Nebulae, Galactic coordinates. This designation is from 'The Strasbourg-ESO Catalogue of Galactic Planetary Nebulae'. This is the current 'state of the art' catalog of planetary nebula, published by the European Southern Observatory.

Kent Wallace put the PNG online at:
http://www.blackskies.org/intro.html#Files

[glenc (Glen)]

Here are 4 PN on YouTube
http://www.youtube.com/watch?v=BXSnjcCIn3M

[glenc (Glen)]

There are 84 PN brighter than mag 12 and larger than 12" in the Kent Wallace list. Fifty-five are NGC PN, 10 are IC PN and 19 are not NGC or IC. I used the DSS to look at the non NGC/IC PN. Five were very faint, fainter than mag 12.
I liked JnEr1 the best. Here is its image (10'x10') from http://archive.eso.org/dss/dss.
See also: http://macalchemist.net/yabb/YaBB.pl?num=1207354831
Jones Emberson 1, also known as the "Headphones"

[GrahamL]

thats a great site glen ..thanks

[glenc (Glen)]

These 4 PN also look interesting:
Lo 5 = PK 286+11.1 (looks vF), Fg 1 = PK 290+07.1, Mz 1 = PK 322-02.1 and Hb 5 = PK 359-00.1

[SMacB]

Hi, I just thought I'd pop in and say hello. You found my image of JnEr1. It is a nice looking PN, I'm hoping to go back for some more subs sometime. Hopefully my second attempt will turn out a lot better

[glenc (Glen)]

SMacB thanks for your image.