UGC 05470 - LRGB (Jan Bielański)

UGC 05470 - LRGB

Leo I (UGC5470, PGC29488) is a dwarf galaxy and most distance satellite of Milky Way (820 000 ly). Object has a little value of dark matter and has the black hole comparable in mass to Saggitarius A* (https://www.sci.news/astronomy/dwarf-spheroidal-galaxy-leo-i-black-hole-10328.html). The galaxy metallicity is very low, only 1% of metallicity in comparison to the Sun. The stars in Leo I are very old. Object is located 12 arc minutes from bright star Regulus which make it difficult in astrophotography and visual observations due to Regulus brightness.
Regulus star is a blue-white subgiant with spectral type B. Star mass is 3.4 times bigger than Sun and the radius is 4.3 times bigger. Regulus is flatten by fast rotation on polar sides and has big temperature difference between polar regions and equator (15 400 K polar region, 10 200 K equator). Star radiates 360 times more energy than Sun at the same time. Regulus is a part of four stars system, the components B and C are known as HD 87884. Component D rotate around Regulus in tight orbit during 40 Earth days and it could be only resolved by spectroscopy observations.
I present series of images:
- Leo I and Regulus full frame, field 3x2 degrees in scale 1:1 (main image with drizzle 2x scale)
- Leo I and Regulus field 2,5x1 degrees in scale 1:2

- Leo I in scale 1:1 additionally I removed Regulus shine on this level

Images with descriptions:
- Full frame + descriptions bright stars and galaxies

- Regulus and Leo I stars bright based on GAIA RD3 catalogue (Regulus 1.4mag, bigger value mean more dark star).

UGC5470_LRGB_25_18_21_20x300s_GC_BXT_Annotated_StarBright_Scale_1to1.jpg

Object: Leo I (UGC5470, PGC29488)
Constellation: Leo
Telescope and processing:
Session: 07,11,12,13.04.2024
Telescope: Tele Vue NP127is
Mount: iOptron CEM60-EC
Camera: QHYCCD QHY600M
Filters / exposition time: 7h
- Baader L CMOS-Optimized 50.4mm - 25x300s -> 2h 5min
- Baader R CMOS-Optimized 50.4mm - 18x300s -> 1h 30min
- Baader G CMOS-Optimized 50.4mm - 21x300s -> 1h 45min
- Baader B CMOS-Optimized 50.4mm - 20x300s -> 1h 40min
Accessories:
- Tele Vue LCL-1069
Image processing:
PixInsight

Poland

	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.	...
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.
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	9706379
PixInsight job	ER779N5CIIT9OR0ZXDXYCHG8TVO8NH2L
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	10h08m26s.503
RA (top/left)	10h04m25s.245
RA (top/right)	10h04m12s.600
RA (bottom/right)	10h12m25s.800
RA (bottom/left)	10h12m44s.462

Dec (center)	+12°18′08″.51
Dec (top/left)	+13°50′11″.64
Dec (top/right)	+10°48′29″.97
Dec (bottom/right)	+10°45′54″.74
Dec (bottom/left)	+13°47′28″.38

Image Index:

Contribution Index (beta):

UGC 05470 - LRGB

UGC 05470 - LRGB

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

UGC 05470 - LRGB

UGC 05470 - LRGB

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information