Sketch of Iota Leonis (Struve 1536)Click image to view larger version. Observation Notes: Iota Leonis was ridiculously difficult in poor seeing--only resolving for moments as a dim fuzzball that was fainter than the primary's flickering diffraction pattern. They both appeared colorless. Smyth saw pale yellow and light blue while Hartung...
July 2011 Archives
Sketch of Struve 1575Click image to view larger version. Observation Notes: This attractive yellow-orange and blue-gray double (K0/F5V) was recorded as white/white by Phillips and orange/white by Harshaw. SubjectStruve 1575 (STF 1575; ADS 8327) ClassificationDouble Star Position (J2000)*Leo [RA: 11 51 57.6 / Dec: +08 49 48] Position AngleAB: 211°...
Sketch of AG 342Click image to view larger version. Observation Notes: AG 342 is an orange-yellow/dull-orange pair, located at the thruster end of a star-destroyer asterism. The diffraction pattern was faint and difficult to pin down. This is a high proper motion pair (190 mas/yr) of K3V stars. SubjectAG 342...
Sketch of NGC 6888Click image to view larger version. Subject:NGC 6888 Issue:August 2011 Astronomy Now Basic Media:White charcoal on black stock Featured Technique:Following Scott Mellish's technique to apply white charcoal powder using paint brushes to create subtle nebulosity. Suggested Sketching Materials: Smooth, black cardstock such as Daler-Rowney Canford White charcoal...
Mare NectarisClick image to view larger version. Subject:Mare Nectaris Issue:July 2011 Astronomy Now Basic Media:Charcoal on white stock Featured Technique:Sketching a broad lunar region by shading a base layer of charcoal and then adding charcoal or subtracting with erasers to refine details. Suggested Sketching Materials: Acid free sketch paper Charcoal...
H-Alpha Sketch of SunClick image to view larger version. Subject:H-Alpha Sun Issue:June 2011 Astronomy Now Basic Media:Graphite and erasers white stock Featured Technique:Preparing an H-Alpha Solar Sketch that captures surface features and prominences along the limb. Suggested Sketching Materials: Clipboard and acid-free drawing paper HB and 2H graphite pencils Charcoal...
Sketch of 88 Leonis / Struve 1547Click image to view larger version. Observation Notes: 88 Leonis is a high proper motion pair (378 mas/yr) with a coppery orange primary next to a colorless secondary. Sissy Haas sees it as bright white paired with a tiny speck. Smyth saw topaz yellow...
Sketch of Tau and 83 Leonis / Struve-A 19 and Struve 1540Click image to view larger version. Observation Notes: This striking double double consists of widely spaced, colorful Tau Leonis (orange-yellow and blue) and 83 Leonis (yellow and red-orange). Subject Tau Leonis (84 LEO / Struve-A 19 / STFA 19)...
Sketch of Tau Leonis / Struve-A 19Click image to view larger version. Observation Notes: I saw this widely spaced, colorful double as Orange-yellow and blue. Despite a G8 primary and G5 secondary, other observers also pick up the blue color contrast in the companion: 33 Doubles - Tau LEO. Sissy...
Sketch of 83 Leonis / Struve 1540Click image to view larger version. Observation Notes: This yellow and red-orange pair consists of a G7V primary and K4V secondary. Sissy Haas sees them as yellow-white and gray. They make a striking, low-power, double-double with nearby Tau Leonis. Subject83 Leonis (Struve 1540 /...
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