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Scorpius OB1 - west

Submitted by Kevin Jardine on 24 June, 2007 - 19:18

Hover your mouse over each blue dot for the name of the object, or click on the dot for a detail page. This map was created using the all-sky hydrogen-alpha map produced by Douglas Finkbeiner from data collected by the WHAM, VTSS and SHASSA hydrogen-alpha surveys.

The Scorpius OB1 - west and adjacent Ara, Scorpius OB1 - east and Eagle/Omega regions are massive molecular cloud and star formation areas located immediately across a large gap inwards from the Orion Arc, and are usually described as being part of the Sagittarius arm of the Milky Way.

The OB association Scorpius OB1, located at a distance of about 1750 parsecs, is surrounded by the diffuse nebula RCW 113. The core of the association is the star cluster NGC 6231, also called the "Northern Jewel Box", which is embedded in the Prawn Nebula, RCW 116. In the same region as Scorpius OB1 is RCW 119, a wind blown bubble surrounding the O6.5 Ia star and prominent X-ray eclipsing binary HD 153919. To the south and in the foreground at 1500 parsecs is RCW 114, which is probably a ring nebula surrounding the Wolf-Rayet star WR 90, expanding into a pre-existing supernova cavity - SNR 343.0-06.0.

Floating a few hundred parsecs in front of RCW 119, at only 1300 parsecs, is the HII region Sh 2-3. In a similar direction, but much further away at about 3300 parsecs, are four nebulae associated with the star cluster Havlen-Moffet 1: Sh 2-4, Sh 2-5, RCW 122 and RCW 123.

RCW 113
RCW 111
RCW 117
RCW 125
RCW 123
RCW 122
Sh 2-4
RCW 128
RCW 116
RCW 115
RCW 119
RCW 107
RCW 108
RCW 110
RCW 118
RCW 126
Sh 2-6
RCW 109
RCW 112
Sh 2-3
Sh 2-8
Sh 2-5
RCW 114