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HD 45507


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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.

Light and radial velocity observations of classical Cepheids
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1976ApJS...32..399E&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Unicorno
Ascensione retta:06h28m02.89s
Declinazione:+05°55'21.2"
Magnitudine apparente:7.726
Distanza:229.885 parsec
Moto proprio RA:-1.5
Moto proprio Dec:-0.8
B-T magnitude:8.949
V-T magnitude:7.827

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 45507
TYCHO-2 2000TYC 145-2533-1
USNO-A2.0USNO-A2 0900-02986536
HIPHIP 30781

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