NGC 4015 or ARP 138 Group, NGC 3987 - LGG 261 Group and NGC 3997 - LGG 260 Group (Riedl Rudolf)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: NGC 3987 · NGC 3989 · NGC 3993 · NGC 3997 · NGC 3999 · NGC 4000 · NGC 4005 · NGC 4009 · NGC 4011 · NGC 4015 · NGC 4018 · NGC 4021 · NGC 4022 · NGC 4023 · PGC 1718226 · PGC 1718879 · PGC 1719109 · PGC 1719882 · PGC 1720457 · PGC 1720535 · PGC 1720549 · PGC 1721856 · PGC 1723557 · PGC 1724216 · PGC 1724416 · PGC 1725160 · PGC 1726138 · PGC 1726156 · PGC 1726304 · PGC 1726385 · And 19 more.

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NGC 4015 or ARP 138 Group, NGC 3987 - LGG 261 Group and NGC 3997 - LGG 260 Group

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NGC 4015 or ARP 138 Group, NGC 3987 - LGG 261 Group and NGC 3997 - LGG 260 Group

NGC 4015 is a interacting Galaxy with PGC 37703. The groups distance is 194 Mio Lj. ARP 138

LGG 260 is a group with NGC 3997 and NGC 3989 and NGC 3993 in a distance of 212 Mio Lj

LGG 261 consists of NGC 3987, NGC 4000, NGC 4005 and NGC 4018 in 200 Mio Lj distance

Sizes in arcmin are:

NGC 4015 2,0 x 1,5 PGC37703 0,8 x 0,3

NGC 3987 2,2 x 0,4

NGC 3989 0,6 x 0,3

NGC 3997 1,6 x 0,7

NGC 4007 1,2 x 0,7

and a lot more

Nikon Imagers
Rarely Imaged Small DSOs

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
Top picks
Top pick nominations

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
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

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
Own remote observatory
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.
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	4287176
PixInsight job	RT2H4L1ZD0RN00DP7GAMA13EIUB82MLF
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	11h58m05s.95
RA (top/left)	11h58m56s.58
RA (top/right)	11h56m11s.15
RA (bottom/right)	11h57m15s.74
RA (bottom/left)	12h00m01s.15

Dec (center)	+25°06′43″.0
Dec (top/left)	+25°30′06″.8
Dec (top/right)	+25°08′06″.8
Dec (bottom/right)	+24°43′09″.3
Dec (bottom/left)	+25°05′12″.1

Image Index:

Contribution Index (beta):

NGC 4015 or ARP 138 Group, NGC 3987 - LGG 261 Group and NGC 3997 - LGG 260 Group

NGC 4015 or ARP 138 Group, NGC 3987 - LGG 261 Group and NGC 3997 - LGG 260 Group

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Image Index:

Contribution Index (beta):

NGC 4015 or ARP 138 Group, NGC 3987 - LGG 261 Group and NGC 3997 - LGG 260 Group

NGC 4015 or ARP 138 Group, NGC 3987 - LGG 261 Group and NGC 3997 - LGG 260 Group

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

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