AG 342 (TYC1978-179-1&2)

Sketch of AG 342 (TYC1978-179-1 & TYC1978-179-2)

Sketch of AG 342

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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.

Subject AG 342 (TYC1978-179-1 & TYC1978-179-2; ADS 8002)
Classification Double Star
Position (J2000)* Leo [RA: 10 59 38.3 / Dec: +25 26 15.5]
Position Angle AB: 112° [My Measurement 2009.9]
AB: 112° [WDS 2008]*
Separation AB: 6″ [My Measurement 2009.9]
AB: 5.2″ [WDS 2008]*
Magnitudes* A: 8.6; B: 9.2
Spectral Types* A: K3V; B: K3V
Date/Time NOV 27, 2009 – 4:15 AM MST (NOV 27, 2009 – 11:15 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, hazy
Seeing 3-4/10 Pickering
Transparency Mag 5.5 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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