Stephenson 1 and delta Lyrae (BrettWaller)

Celestial hemisphere: Northern · Constellation: Lyra (Lyr) · Contains: The star δ1Lyr · The star δ2Lyr

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Stephenson 1 and delta Lyrae

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Stephenson 1 and delta Lyrae

Delta Lyrae is a visual double and spectacular color-contrast pair of stars, one of which is also a member of the open cluster Stephenson 1, first identified by Gordon Grant, and described after his death by Charles B. Stephenson in 1959. The brightest of the two stars is delta-2 Lyrae, an orange, magnitude 4.5, M4 giant star which contrasts sharply with its companion, cluster member delta-1 Lyrae, a bluish white, magnitude 5.5, B3 main sequence star. The remainder of the 20 or so members of Steph 1 are scattered between the two deltas, but mostly concentrated to the west of delta-2 Lyrae. Steph 1 is often referred to as the " delta Lyrae cluster, and also carries the designations Lund 370 and OCL-137.

Steph 1 is a Trumpler Type IV 3 p open cluster spanning an angular diameter of 20' with an integrated visual magnitude of 3.8, and is located approximately 1,080 light years away. In contrast, the orange orphan delta-2 Lyrae is much closer, only 900 light years from Earth. The cluster is an easy binocular target, and spectacular under low power in a rich-field telescope.

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Distribution of astrophotographers

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	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
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Northern lights
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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.

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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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Stephenson 1 and delta Lyrae

Stephenson 1 and delta Lyrae

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Stephenson 1 and delta Lyrae

Stephenson 1 and delta Lyrae

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