Collinder 26 (Melotte 15 / Open Cluster)
- Collinder 26 is the open cluster better known as Melotte 15, located at the heart of the Heart Nebula (IC 1805) contains a few bright stars in Cassiopeia.
o - The Heart Nebula (also known as the Running Dog Nebula, Sharpless 2-190) is an emission nebula and located in the Perseus Arm of the Galaxy in the constellation Cassiopeia.
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- Object Name
C26
- Object Type
Open Cluster
- Constellation
Cassiopeia
- Magnitude
6.5
- Distance
7,500 light-years
- Annotated
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Equipment
Telescope:
Mount:
Accessories:
Sky-Watcher Esprint 80ED Triplet
Sky-Watcher AZ-EQ6 GT
ZWO ASIair Plus / PixInsight
Camera:
Guiding:
Filter:
ZWO ASI2600MC Pro cooling
ZWO ASI1200MM
2″ Optolong L-eNhance
Bortle Scale: Kelling Heath, Weybourne, North Norfolk (Bortle 4.1)
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Integration
- Date:
Tuesday 22nd October 2024
- Moonlit:
Waxing Crescent 20 days old
Magnitude: -12.4
Moonlit: 70%
- Total:
60’s x 200 subs = 3 hours 20 minutes
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Constellation :- Cassiopeia (The Queen)
Object :-
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Magnitude :–
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Cr 26
The Heart Nebula / The Running Dog Nebula /
Sh2-190 / Melotte 15 (Mel 15)
Open Cluster
10.0
7,500 light years / 165 light years across
Cas (Cassiopeia (The Queen)
02h 33m 22s
+61° 25′ 36″
Enlarge on click the map.
(Click the map above for a large view.)
| Abbreviation: Cas |
| English Name: The Cassiopeia Queen |
| Genitive: Schedar, sometimes spelt Shedar or Shedir. |
| Hemisphere: Northern Hemisphere |
| Location: Between the constellations of Andromeda and Cephus. |
| Visible between latitudes: +90 and -20 degrees |
| Best season: Autumn |
| Seen in three seasons: Summer, Autumn and Winter |
| Best seen in: November |
| Seen between: Circumpolar (This constellation of Cassiopeia stays in the sky all the year.) |
| Right Ascension (RA): 01 hour |
| Declination (DEC): +60 degrees |
| Area (square degrees): 598 (25th) |
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Facts about Collinder 26 (Cr 26)
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- Cr 26 is the young star cluster in the middle of the Heart Nebula.
o - It is about 7,500 light‑years away and only 1.5 million years old.
o - Its huge, hot stars blow strong winds that shape the glowing gas around them, creating pillars and cavities (LDN 1369).
o - Similar in appearance to the “Pillars of Creation” in the Eagle Nebula (Messier 16).
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