Sh2 174 (Valentine Rose Nebula) (Jerry Yesavage)

Sh2 174 (Valentine Rose Nebula)

Repeating one more of the Sharpless2 Group to see what my new CMOS system can find.

Used the Dynamic Combination Recipe in A & B and the new NarrowBand Assistant script in C. This script was developed by Alex Woronow and it quite a mathematical tour de force.

Stars in all versions derived from NBA. I think NBA is more natural but i have to say I like the colorfulness of the Dynamic Combo.

Previous versions of SH2 174 in H-Alpha.

Sh2 174 H-Alpha RGB

Discussion of GHS aspects of processing:

GHS Forum Discussion

If you are interested, this is the combination recipe:

Dynamic Combo

From GalaxyMap:

The former central star of this old planetary nebula, the white dwarf GD 561, has drifted to the outside of the nebula.

GENERAL NOTE ON SHARPLESS2 OBJECTS>>>>>>>>>>>>>

There are 313 Sh2 objects. All now imaged.

This is my collection:

Sharpless2

Wide-Angle Hydrogen Alpha Nikon Image Sh2 79-171

Please note there is also a Sharpless2 Group with now more than 2700 examples.

Sharpless2 Group

Other useful links include:

Gary Imm's Collection

GalaxyMap's Collection

The Sharpless Catalog

The MDW H-alpha Sky Survey

Reiner Vogel's detailed observing catalog

Hope you enjoy these obscure but interesting objects...I have always been interested in the dull O-III component here so I decided to try to apply Dynamic Combination, which emphasizes O-III and General Hyperbolic Stretch (GHS) which emphasizes dull signals.

Discussion of GHS aspects of processing:

GHS Forum Discussion

If you are interested, this is the combination recipe:

Dynamic Combo

Final
Original
B
C

B

Title: 2X Crop

Uploaded: ...

C

Title: NarrowBand Assistant Version

Description: Done with the NarrowBand Assistant Script. Both versions use NBA stars.

Uploaded: ...

Sharpless2 Objects
Planetary Nebulae
ASI 6200 MM Pro
The refractors!
Cloudy Nights
Fine Art Astrophotography
SF Bay Area Imagers
GHS Made a Substantial Difference
Members of Deep Sky West
"Simply Stellarvue"
Narrowband imaging
Suburban Astrophotography

Sharpless2 Objects

	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
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Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
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	6189387
PixInsight job	VUD6KX2MCBL8ZFVUL4R0Y4ICZ6SB76R5
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h46m55s.510
RA (top/left)	00h15m26s.674
RA (top/right)	23h18m17s.140
RA (bottom/right)	23h22m19s.476
RA (bottom/left)	00h11m36s.225

Dec (center)	+80°56′08″.69
Dec (top/left)	+81°33′29″.39
Dec (top/right)	+81°33′04″.19
Dec (bottom/right)	+80°11′39″.48
Dec (bottom/left)	+80°12′02″.80

Image Index:

Contribution Index (beta):