Hemisphere:  Northern  ·  Constellation: Cancer (Cnc)  ·  Contains:  38 Cnc  ·  39 Cnc  ·  40 Cnc  ·  41 eps Cnc  ·  42 Cnc  ·  Beehive  ·  Beehive cluster  ·  IC2388  ·  IC2390  ·  M 44  ·  M44  ·  NGC 2632  ·  NGC2624  ·  NGC2625  ·  NGC2637  ·  NGC2643  ·  NGC2647  ·  Praesepe  ·  Praesepe Cluster
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M 44 The Beehive Cluster, 



    
        

            Roland Schliessus
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M 44 The Beehive Cluster

Getting plate-solving status, please wait...
M 44 The Beehive Cluster, 



    
        

            Roland Schliessus
Powered byPixInsight

M 44 The Beehive Cluster

Imaging telescopes or lenses: Skywatcher EvoStar 100ED 900mm f/9.0

Imaging cameras: ZWO ASI 1600MM-Pro (Mono)

Mounts: iOptron CEM60 on concrete pier

Guiding telescopes or lenses: Skywatcher 180mm f/3.6

Guiding cameras: Altair GPCAM 130 Mono

Focal reducers: Skywatcher Flattener/Reducer 0.85

Software: Adobe Photoshop CC  ·  PixInsight 1.8  ·  Sequence Generator Pro  ·  PHD2 Guiding  ·  DeepSkyStacker (DSS) 4..1.1

Filters: Baader B 1.25"  ·  Baader G 1.25"  ·  Baader R 1.25"  ·  Baader L 1.25"

Accessory: Myfocuser2 based DIY


Dates:April 16, 2021

Frames:
Baader B 1.25": 12x180" (36') (gain: 139.00) -20C bin 1x1
Baader G 1.25": 12x180" (36') (gain: 139.00) -20C bin 1x1
Baader L 1.25": 21x30" (10' 30") (gain: 139.00) -20C bin 1x1
Baader R 1.25": 12x180" (36') (gain: 139.00) -20C bin 1x1

Integration: 1h 58' 30"

Darks: ~50

Flats: ~50

Bias: ~50

Avg. Moon age: 3.93 days

Avg. Moon phase: 16.45%

Bortle Dark-Sky Scale: 4.00


Astrometry.net job: 4530388

RA center: 8h 40' 28"

DEC center: +19° 39' 29"

Pixel scale: 0.998 arcsec/pixel

Orientation: 40.713 degrees

Field radius: 0.784 degrees


Resolution: 4542x3366

Locations: Terrassensternwarte, Ostrach, Baden-Württemberg, Germany

Data source: Backyard

Description

The Beehive Cluster (also known as Praesepe (Latin for "manger", M44, NGC 2632, or Cr 189), is an open cluster in the constellation Cancer. One of the nearest open clusters to Earth, it contains a larger population of stars than other nearby bright open clusters. Under dark skies, the Beehive Cluster looks like a small nebulous object to the naked eye, and has been known since ancient times. Classical astronomer Ptolemy described it as a "nebulous mass in the breast of Cancer". It was among the first objects that Galileo studied with his telescope.

Age and proper motion coincide with those of the Hyades, suggesting they may share similar origins. Both clusters also contain red giants and white dwarfs, which represent later stages of stellar evolution, along with many main sequence stars.

Distance to M44 is often cited to be between 160 and 187 parsecs (520–610 light years), but the revised Hipparcos parallaxes (2009) for Praesepe members and the latest infrared color-magnitude diagram favors an analogous distance of 182 pc. There are better age estimates of around 600 million years (compared to about 625 million years for the Hyades). The diameter of the bright inner cluster core is about 7.0 parsecs (23 light years).

=================== Source: Wikipedia ============================

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M 44 The Beehive Cluster, 



    
        

            Roland Schliessus

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