90 Leonis (Struve 1552)

Sketch of 90 Leonis (Struve 1552/STF 1552)

Sketch of 90 Leonis (Struve 1552)

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Observation Notes:

The trio of 90 Leonis appeared sky blue, cream, and dull orange. Sissy Haas sees yellow, yellow, gray and Smyth saw silvery-white, purplish, pale-red.

Subject 90 Leonis (STF 1552 / ADS 8220)
Classification Multiple Star
Position (J2000)* Sextans [RA: 11 34 42.5 / Dec: +16 47 48.9]
Position Angle AB: 214° [My Measurement 2009.9]
AB: 208° [WDS 2007]*
AC: 234°
AC: 235° [WDS 2007]*
Separation AB: 4″ [My Measurement 2009.9]
AB: 3.5″ [WDS 2007]*
AC: 63″ [My Measurement 2009.9]
AC: 63.2″ [WDS 2007]*
Magnitudes* A: 6.3; B: 7.3 C: 9.8
Spectral Types* A: B4V; B: B9V; C: F5
Date/Time NOV 26, 2009 – 4:50 AM (NOV 26, 2009 – 11:50 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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