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Hi John,
Many thanks for your tips on observing the HH.
Your suggestion that the failure to observe was due to red sensitivity in the eyes of the viewers is intriguing. I shall share your post with other members.
You comment that the sky at Linden is now just "fair" rather than "dark" and yes, when objects are in the east and in the Sydney skyglow, it is a sad situation. To the north and west it is not so bad. But it is not pristine (to use your term). Still, it's WAY better than trying from UWS Penrith (closer to Sydney). On the plains, the light pollution is really serious.
Regards,
Tony Barry
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