LoTr 5 - Planetary Nebula in Coma Berenices

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LoTr 5 - Planetary Nebula in Coma Berenices

#1

Post by bernhardhubl »

Hello group,

PN LoTr 5 (Longmore-Tritton 5) is a large, faint planetary nebula in the constellation of Coma Berenices in a distance of 1,650 light-years.

The central system at LoTr 5 is a binary star, which consists of an evolved G-type star (IN Comae Berenices) and a hot white dwarf that is responsible for ionizing the nebula. The white dwarf is one of the hottest stars known, with an effective temperature of about 150,000 K.

IN Comae Berenices is known to be a variable star, with its brightness varying on a cycle that is about 5.9 days long. This corresponds to the rotation period of the star, and the variability is attributed to starspots.

LoTr 5 has the highest galactic latitude of any known planetary nebula, being only 1.5 degrees away from the galactic north pole. This is the reason why so many distant galaxy clusters are visible in the field around this planetary nebula. See object identification image!

PN_LoTr_5-2.jpg
Image


PN LoTr 5 with 12" Newtonian and QSI 660:
http://www.astrophoton.com/PN_LoTr_5-2.htm


Object identification image with distant galaxy clusters:
http://www.astrophoton.com/images/PN_Lo ... d_full.jpg


best,
Bernhard
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#2

Post by messier 111 »

very nice , thx .
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#3

Post by Lady Fraktor »

Fantastic image Bernhard!
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#4

Post by MariusD69 »

Very impressive! Great work!!
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

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Post by John Donne »

Sweeeet image !
Thank you. 👍
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#6

Post by SparWeb »

At first your title led me to think your post would be about "Lord of The Rings"... but I'm not disappointed!
That's a great image.

Reading up a bit on this star system, the white dwarf companion has some pretty impressive specs: 150,000K surface temperature!
I'm not convinced by the article references that the temperature is anything but an estimate, but if confirmed, would be amazing.
Decide for yourselves:
https://en.wikipedia.org/wiki/LoTr_5
https://www.aanda.org/articles/aa/full_ ... 8.html#R24
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#7

Post by bernhardhubl »

Hello Jean-Yves, Lady Fraktor, Marius, John, Steve and all others,

Thank you very much for your nice comments!

Steve: Thanks for the links to the article references.
I am not sure how resilient the statement of the effective temperature of 150,000 K is (It was mentioned in Wikipedia).

best,
Bernhard
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#8

Post by Robko »

Wow! Impresiv image. 10nights on one subject?! Sounds like work.....
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#9

Post by Jockinireland »

Thats not a target I've seen before. Looks great. Well done indeed.
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#10

Post by kt4hx »

That is a fine image Bernhard, with excellent structural detail and color. It is good to see an object that is not frequently targeted by the AP crowd. I have not tried it visually from our dark site with the 17.5 inch dob, but I have made a note to do so. It is also known as PN G339.9 + 88.4, and I thank you for posting your image of a rarely pursued object.
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

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Post by Ylem »

Very very nice 👍 🙂
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

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Post by TheButcher »

That is Awesome!
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

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Post by bernhardhubl »

Hello Robko, Jockinireland, Alan, Jeff and TheButcher,

Thank you very much for your nice words! Your comments are very much appreciated.

best,
Bernhard
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#14

Post by Gordon »

Congratulations Bernhard on having your image selected as todays TSS APOD!!

app.php/article/5-25-2021-tss-astrophot ... of-the-day
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#15

Post by Makuser »

Hello Bernhard. A perfect bulls-eye. I love the reflection nebulosity color and the bright central binary star in your image. Thanks for sharing this capture with us Bernhard, and keep up this great work.
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#16

Post by Ruud »

   That's a beautiful image Bernhard!
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#17

Post by helicon »

Congrats Bernhard on winning the APOD for today! What a great image. It reminds a bit of the Death Star.
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#18

Post by Juno16 »

Beautiful image Bernard and congratulations on the apod!

In wikipedia, the text states 150,000K, but table on the right side of the Binary System section states 5400k. Either way, an amazing image of a very faint target! Nice work!
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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#19

Post by Larry 1969 »

Stunning image!
45 and a half hours on target?!?!
Congratulations on a well deserved APOD!

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Re: LoTr 5 - Planetary Nebula in Coma Berenices

#20

Post by bernhardhubl »

Hello Gordon, Marshall, Ruud, Michael, Jim, Larry and all others!

Thank you so much for your nice words!
In wikipedia, the text states 150,000K, but table on the right side of the Binary System section states 5400k. Either way, an amazing image of a very faint target! Nice work!
The 5400K is the effective temperature of the G5 star component.
The white dwarf, which is responsible for the ionisation of the nebula, has a much, much higher temperature. Maybe not 150,000 K, but sureley near or more than 50,000K.

best,
Bernhard
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