Main Page | See live article | Alphabetical index The Red Spider Nebula, or NGC 6537, is a planetary nebula in the Sagittarius constellation. Right Ascension: 18 : 05.2 (hours : minutes) Declination: -19 : 51 (degrees : minutes) Apparent Magnitude: 13. p Apparent Diameter: 0.2 (arc minutes) This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.