Struve 2259

Sketch of Struve 2259/STF 2259

Sketch of Struve 2259

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Observation Notes:

Struve 2259 hit the top of my double star favorites the moment it came into view. It is a beautiful gold/blue pair at the heart of a starry bow-tie dominated by the brilliant white Nu Herculis. It looked best at 120X in a 35 arc minute wide field. I used this observation to demonstrate white ink/pastel-on-black sketching techniques in the June 2009 Drawn to the Universe column. The illustration above is generated using my usual digital double star technique. If you're touring Hercules, take a moment to breeze over to Nu Herculis, drop southeast about 12 arc minutes and take in this magnificent sight.

SubjectSTF 2259 (ADS 10955)
ClassificationDouble Star
Position (J2000)*Hercules [RA: 17 59 03.6 / Dec: +30 02 56.1]
Position Angle278° [My Measurement 2009.3]
277° [WDS 2008]*
Separation22" [My Measurement 2009.3]
19.6" [WDS 2008]*
Magnitudes*A: 7.2; B: 8.4
Spectral Types*A: G8II-III; B: A1V
Date/TimeAPR 5, 2009 - 1:30 AM (APR 5, 2008 - 08:30 UT)
Observing Loc.Flagstaff, AZ - Home
InstrumentOrion SkyQuest XT8 Dobsonian (203 mm dia./1200 mm F/L)
Eyepieces/Mag.Pentax XW10 (120X)
Meade Astrometric EP + 2X Barlow (200X)
ConditionsClear, light breeze
Seeing5/10 Pickering
TransparencyMag 5.0 NELM
*ReferencesThe Washington Visual Double Star Catalog (Mason+ 2001-2009); Catalogue of Stellar Spectral Classifications (Skiff, 2009); SIMBAD

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This page contains a single entry by Jeremy Perez published on December 3, 2009 9:35 PM.

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