Iota Leonis (Struve 1536)

Sketch of Iota Leonis (Struve 1536 / STF 1536)

Sketch of Iota Leonis (Struve 1536)

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Observation Notes:

Iota Leonis was ridiculously difficult in poor seeing--only resolving for moments as a dim fuzzball that was fainter than the primary's flickering diffraction pattern. They both appeared colorless. Smyth saw pale yellow and light blue while Hartung saw deep yellow and whitish.

SubjectIota Leonis (STF 1536; 78 Leonis; ADS 8148)
ClassificationDouble Star
Position (J2000)*Leo [RA: 11 23 55.5 / Dec: +10 31 46.2]
Position AngleAB: 97° [My Measurement 2009.9]
AB: 105° [WDS 2007]*
SeparationAB: 3" [My Measurement 2009.9]
AB: 1.9" [WDS 2007]*
Magnitudes*A: 4.1; B: 6.7
Spectral Types*A: F4IV; B: F5V
Date/TimeNOV 27, 2009 - 5:30 AM MST (NOV 27, 2009 - 12:30 UT)
Observing Loc.Flagstaff, AZ - Home
InstrumentOrion SkyQuest XT8 Dobsonian (203 mm dia./1200 mm F/L)
Eyepieces/Mag.Pentax XW10 + 2X Barlow (240X)
Meade Astrometric EP + 2X Barlow (200X)
ConditionsClear, cold, hazy
Seeing3-4/10 Pickering
TransparencyMag 5.5 NELM
*ReferencesThe 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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This page contains a single entry by Jeremy Perez published on July 30, 2011 11:27 PM.

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