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Variable Stars
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Photometric Monitoring -
Variables
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- RX And, U And, TT Ari, S Cyg, SS Cyg, BL Lac, RU Peg, GK Per, V Sge, RR Tau
Other Variable Star Attempts failed due
to Autostar II failure.
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Astrometric Monitoring - Nearby
Stars
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- HH And (Ross 248), Groombridge
34
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Evening session (2.4 hr). Cold,
ground fog at some stage, freezing ice on scope.
Autostar II failure 1.5 hrs into session, whereby
LX200 scope wouldn't respond to programmed slew commands
(0.9 hrs of imaging data wasted). Autostar screen blank or
jumbled / text. Autostar still not responding
correctly after turning LX200 off /on a few times. Slew
buttons responding to presses ok, and the scope was finally
'roughly' parked (without the need to unlock the RA
clutch). Given the low temperature this was clearly
a job that needed daylight hours to sort out (perhaps the
Autostar firmware had become corrupted ?)
Tried the scope the next day in daylight conditions. and found
that the autostar contol box was again responding normally and
the LX200 started up ok as it should (the previous night's
problem is put down to either just a 'gremlin' or problem
related to a combination of low temperature (-3 degC) and
freezing fog ) Performed a rough sync and parked the scope.
A few evenings later the scope was aligned on a star field and
then correctly parked ready for session S406. |
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Session operated under semi-automated
control |
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Ambient
Temperature: Initially -1.0 degC falling to -3.0 degC by end of session |
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CCD operation -25 degC (at
50% average cooling). |
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main objective of the
session was to acquire images of key selected stars for ongoing photometric and astrometric
analysis. |
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