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HD 259657


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Observations of Star-Forming Regions with the Midcourse Space Experiment
We have imaged seven nearby star-forming regions, the Rosette Nebula,the Orion Nebula, W3, the Pleiades, G300.2-16.8, S263, and G159.6-18.5,with the Spatial Infrared Imaging Telescope on the Midcourse SpaceExperiment (MSX) satellite at 18" resolution at 8.3, 12.1, 14.7, and21.3 μm. The large angular scale of the regions imaged (~7.2-50deg2) makes these data unique in terms of the combination ofsize and resolution. In addition to the star-forming regions, twocirrus-free fields (MSXBG 160 and MSXBG 161) and a field near the southGalactic pole (MSXBG 239) were also imaged. Point sources have beenextracted from each region, resulting in the identification over 500 newsources (i.e., no identified counterparts at other wavelengths), as wellas over 1300 with prior identifications. The extended emission from thestar-forming regions is described, and prominent structures areidentified, particularly in W3 and Orion. The Rosette Nebula isdiscussed in detail. The bulk of the mid-infrared emission is consistentwith that of photon-dominated regions, including the elephant trunkcomplex. The central clump, however, and a line of site toward thenorthern edge of the cavity show significantly redder colors than therest of the Rosette complex.

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Datos observacionales y astrométricos

Constelación:Unicornio
Ascensión Recta:06h33m38.63s
Declinación:+05°57'14.2"
Magnitud Aparente:9.185
Movimiento Propio en Ascensión Recta:-4.3
Movimiento Propio en Declinación:-7.2
B-T magnitude:10.495
V-T magnitude:9.294

Catálogos y designaciones:
Nombres Propios
HD 1989HD 259657
TYCHO-2 2000TYC 158-2366-1
USNO-A2.0USNO-A2 0900-03115006
HIPHIP 31281

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