Struve 2194

Sketch of Struve 2194/STF 2194

Sketch of Struve 2194

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Observation Notes:

Struve 2194 consists of a 6.5/9.3 magnitude pair separated by 16 arc seconds at 8°PA. I measured this pair at 18 arc seconds and 7°. There is also another 9th magnitude C star further south that I plotted, but did not measure. The main pair appeared yellow and blue.

Subject STF 2194 (ADS 10715)
Classification Multiple Star
Position (J2000)* Hercules [RA: 17 41 05.5 / Dec: +24 30 47.7]
Position Angle AB: 8° [My Measurement 2009.3]
AB: 7° [WDS 2007]*
AC: 163° [WDS 2002]*
Separation AB: 18″ [My Measurement 2009.3]
AB: 16.3″ [WDS 2007]*
AC: 168.9″ [WDS 2003]
Magnitudes* A: 6.5; B: 9.3; C: 9.3
Spectral Types* A: K1III; B: F4V; C: K2
Date/Time APR 5, 2009 – 12:45 AM (APR 5, 2008 – 07:45 UT)
Observing Loc. Flagstaff, AZ – Home
Instrument Orion SkyQuest XT8 Dobsonian (203 mm dia./1200 mm F/L)
Eyepieces/Mag. Pentax XW10 + 2X Barlow (240X)
Meade Astrometric EP + 2X Barlow (200X)
Conditions Clear, light breeze, 1st qtr moon
Seeing 5/10 Pickering
Transparency Mag 5.0 NELM
*References The Washington Visual Double Star Catalog (Mason+ 2001-2009); Catalogue of Stellar Spectral Classifications (Skiff, 2009); SIMBAD

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