| Steve Bodin | ||||
| Star: Struve 891 Date & Time: 5 Feb 2006, 10pm to midnight Time: Seeing: 4-5/10 Transparency: poor, ring around the moon Location of site: Mattawa Wa, USA 46.9N,119.9W Site classification: Rural Conditions: 35F, no wind, dry Sky darkness: limiting mag 4.5 due moon Telescope: Meade 16 inch LX200GPS UHTC Eyepieces: not used Imaging: DX8263SL video camera at f5 with reducer and 3x barlow Magnification: app. 300x ,900x |
Well here is
a real puzzle. First, this is a double-double, both pairs
are wide and fairly faint. The WDS lists STF 892 slightly north and
west of STF
891, but this faint pair is following, clearly east and nearly the same
declination. But, the last WDS measure of STF 892 is 1832, probably by
Struve himself,
and precession of coordinates could account for an error if the
original
position was not as precise as today's astrometry. Quick check of POSS
plates
shows the suspected STF892 following STF891. Anyway, measured as
follows; STF
891; 21.98 sec at 293.9 deg PA, 891A to 892 A , 148.2 sec at 090.1 deg
PA,
STF892; 38.5 sec at 041.0 deg PA. |
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