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 |