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View Full Version here: : Lunar occultation: 2nd June 18:57


Gargoyle_Steve
02-06-2006, 08:03 PM
I had one of those great "surprise" moments tonight - you know, the things that happen and you are there just at the right place at the right time by sheer accident.

I was out nice and early tonight, observing the moon at around 80x, looking at a few of my favourite craters, etc, when I realised that there was a "smallish" sized star (as seen through my 15mm eyepiece) not too far from the dark limb. I watched for a very short while and realised it would be occulted quite soon!

(After watching this star for a few minutes I started to get very faint "glimpses" of a close and extremely faint companion to this star - only picked it up in snatches, and only by looking off axis.)

Anyway I stayed focused on my star, watching it edge closer and closer to the moon's dark edge (the opposite actually, but you know what I mean) and at approximately 18:57 my time (by my mobile phone, only thing I had on me) I watched it very suddenly and quickly wink out! (The faint "object" near it vanished I think approximately a minute before - as I said it was so faint it was hard to know when it was there, and when it was gone.)

I came running in to check the tables in Astronomy 2006 and found (page 96, middle column) only one occultation listed tonight against Brisbane - at 20:08! Looking further into it the same object (SAO99198) should be seen going into occultation in Canberra at 19:51 and Sydney at 19:56 .... still around an hour after the occultation I witnessed.

:shrug:

If anyone can shed more light on this (no pun intended, really!) please let me know ... can anyone tell me which object I did see occulted?

Steve

Dennis
02-06-2006, 08:12 PM
Hi Steve

Here is a screen shot from TheSky 6.

Cheers

Dennis

Gargoyle_Steve
02-06-2006, 10:18 PM
Dennis you are a champion - that star certainly would seem to fit the bill!!
I'm a newbie and have no idea how to judge magnitudes, so unless I have a known similar mag object nearby I'm stumped - I would have thought it was maybe a mag 9 or 10 star or so, but I'm obviously way out. Next to a fair sized wedge of illuminated moon appearances can be deceiving and everything looks dim by comparison!

This was my first lunar occultation so it was an exciting moment, to see it happen so spur of the moment that way, but now at least I know what object to put in my observing log.

Thanks Dennis!