[Prev][Next][Index][Thread][Search][Objects]
(IAAC) Obj: iota Ori - Inst: Orion 6" Dob
----
Observer: William L.Schart
Your skills: Intermediate (some years)
Date/time of observation: 1/12/00 8:50 pm CST
Location of site: Killeen, TX (Lat 31, Elev 820)
Site classification: Suburban
Sky darkness: 4 <Limiting magnitude>
Seeing: 8 <1-10 Seeing Scale (10 best)>
Moon presence: Minor - crescent or far from object
Instrument: Orion 6" Dob
Magnification: 48x, 72x, 980x
Filter(s): none
Object(s): iota Ori
Category: Multiple star.
Class:
Constellation: Oir
Data: mag size
Position: RA : DEC :
Description:
The last star in the 'sword' is a triple system. At 48x without any
additional aid I could detect a wide spaced but faint second star.
With the aid of an hexagonal objective mask I could detect a third,
brighter but very close star. Both were visible at 72x without any
aid. The primary is a bright white to whitish-yellow, the close
companion seemed blue in comparison.
The third was too faint to tell color.
Separation AB = 14”, BC = 40”, AC = 49”
PA AB = 140, BC = 89, AC = 99
--
Optional related URLs:
** This observing log automatically submitted via the Web from:
http://www.visualdeepsky.org/enter-log.html
To UNSUBSCRIBE from the 'netastrocatalog' lists, use the Web form at:
http://www.visualdeepsky.org/subscribe.html