Hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  IC831  ·  IC832  ·  IC835  ·  IC837  ·  IC838  ·  NGC 4725  ·  NGC4712  ·  NGC4725  ·  NGC4747  ·  NGC4849  ·  NGC4859  ·  PK339+88.1
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LoTr 5, NGC 4725 and NGC 4747, 



    
        

            Steed Yu
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LoTr 5, NGC 4725 and NGC 4747

Getting plate-solving status, please wait...
LoTr 5, NGC 4725 and NGC 4747, 



    
        

            Steed Yu
Powered byPixInsight

LoTr 5, NGC 4725 and NGC 4747

Imaging telescopes or lenses: SharpStar 15028HNT

Imaging cameras: QHYCCD QHY268C

Mounts: iOptron CEM 60

Guiding telescopes or lenses: QHYCCD QHYmini Guide Scope

Guiding cameras: QHY5L-II-M

Software: Pleiades Astrophoto S.L. PixInsight 1.8.8 Ripley

Filters: Optolong 2" UV/IR Cut


Dates:April 23, 2020April 27, 2020April 29, 2020

Frames:
Optolong 2" UV/IR Cut: 23x300" (gain: 30.00) -15C bin 1x1
Optolong 2" UV/IR Cut: 72x300" (gain: 30.00) -20C bin 1x1

Integration: 7.9 hours

Darks: ~200

Flats: ~50

Flat darks: ~50

Bias: ~100

Avg. Moon age: 3.48 days

Avg. Moon phase: 17.79%

Bortle Dark-Sky Scale: 3.00


Astrometry.net job: 3509057

RA center: 12h 53' 2"

DEC center: +25° 48' 14"

Pixel scale: 1.854 arcsec/pixel

Orientation: -0.315 degrees

Field radius: 1.916 degrees


Resolution: 6187x4118

Locations: qingshui, Beijing, BeiJing, China

Data source: Traveller

Description

Lotr 5, short for Longmore-Tritton 5, is a large, faint planetary nebula in our Galaxy, about 1650 light-years away from us. It is one of the largest planetary nebulae known, with a radius of 1.8 light-years. It has the highest galactic latitude of any known planetary nebula, being only 1.5 degrees away from the galactic north pole.

NGC 4725 and NGC 4747 are two galaxies out of our Galaxy, about 41 million light-years away. The smaller distorted galaxy, NGC 4747, has extensive tidal tails, indicates strong gravitational interactions in its past. The larger galaxy, NGC 4725, appears to be a normal spiral galaxy at first glance, but it does look a little odd with only one main spiral arm.

To the right of NGC 4725, there is a smaller galaxy, NGC 4712, which is a distant background galaxy that has nothing to do with the pair of interacting galaxies and is more than 200 million light-years away.

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