49 Leonis (Struve 1450 / TX LEO)

Sketch of 49 Leonis (Struve 1450 / STF 1450 / TX LEO)

Sketch of 49 Leonis / Struve 1450 / TX LEO

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Observation Notes:

Seeing conditions weren’t the greatest this evening, so I couldn’t snag this one until it approached culmination. I was able to finally spot the speck of the secondary emerging from the primary’s diffraction pattern. Both stars appeared white. Haas sees them as bright yellow-white/white; Smyth sees silvery-white/pale-blue.

Subject 49 Leonis (Struve 1450 / STF 1450 / ADS 7837 / TX LEO)
Classification Double Star
Position (J2000)* Coma Berenices [RA: 10 35 02.2 / Dec: +08 39 01.5]
Position Angle AB: 153° [My Measurement 2009.9]
AB: 154° [WDS 2008]*
Separation AB: 2″ [My Measurement 2009.9]
AB: 2.2″ [WDS 2008]*
Magnitudes* A: 5.8; B: 7.9
Spectral Types* A: A2V
Date/Time NOV 26, 2009 – 5:50 AM (NOV 26, 2009 – 12:50 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, cold
Seeing 3/10 Pickering
Transparency Mag 6.0 NELM
*References The Washington Visual Double Star Catalog (Mason+ 2001-2009); Catalogue of Stellar Spectral Classifications (Skiff, 2009); SIMBAD; Double Stars for Small Telescopes – Sissy Haas

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