HFG 1, PK 136.3+05.5 (Big_Dipper)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas)

Image of the day 10/05/2018

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HFG 1, PK 136.3+05.5

Image of the day 10/05/2018

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HFG 1, PK 136.3+05.5

HFG 1 steht für Heckathorn, Fesen, Gull. Das sind die Namen der Astronomen die den Nebel 1982 entdeckt haben.Es handelt sich hierbei um einen sehr Lichtschwachen, jedoch Flächenmäßig relativ großen Planetarischen Nebel im östlichen Teil des Sternbildes Cassiopeia.

Die Flächenhelligkeit beträgt 23,7 mag. Im Zentrum des Nebels entdeckten Astronomen ein

Doppelsternsystem, dessen hellere Komponente (V664 Cas) ein Veränderlicher Stern ist.

13,7 mag hell, Amplitude 1,1 mag in 14 Stunden.

Erst 2009 wurde ein Kometenartiger Schweif mit ca. 5 Bogenminuten Breite und ca. 20

Bogenminuten Länge entdeckt.

Der etwa 15 Bogenminuten Große Nebel leuchtet nur schwach im Licht des zweifach

Ionisierenden Sauerstoff (OIII). Der Schweif ist noch um einiges schwächer und leuchtet

Im Spektrum des ionisierenden Wasserstoff (Halpha).

Die Daten sind zwischen 18. August und 16. September 2018.

HFG 1 stands for Heckathorn, Fesen, Gull. These are the names of the astronomers who discovered the fog in 1982. It is a very faint, but relatively large area

Planetary nebula in the eastern part of the constellation Cassiopeia.

The surface brightness is 23.7 mag. In the center of the nebula astronomers discovered

Binary star system whose brighter component (V664 Cas) is a variable star.

Amplitude 1.1 mag in 14 hours.

Only in 2009 was a comet-like tail with about 5 arc minutes wide and about 20

Arc minutes discovered length.

The approximately 15 arc minute Great Mist only glows weakly in the light of the double

Ionizing oxygen (OIII). The tail is still weaker and shining

In the spectrum of ionizing hydrogen (Halpha).

The dates are between 18th August and 16th September 2018.

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
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Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
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Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	3366601
PixInsight job	DZ4KR1RNSSPLYYZVRR7H3L77IKYZ7V6I
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	03h02m41s.32
RA (top/left)	03h05m39s.90
RA (top/right)	02h59m56s.56
RA (bottom/right)	02h59m47s.34
RA (bottom/left)	03h05m22s.70

Dec (center)	+64°54′18″.2
Dec (top/left)	+65°11′22″.10
Dec (top/right)	+65°12′45″.4
Dec (bottom/right)	+64°36′58″.5
Dec (bottom/left)	+64°35′36″.4

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Image of the day 10/05/2018

HFG 1, PK 136.3+05.5

Image of the day 10/05/2018

HFG 1, PK 136.3+05.5

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Image of the day 10/05/2018

HFG 1, PK 136.3+05.5

Image of the day 10/05/2018

HFG 1, PK 136.3+05.5

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