# Kuiper belt

1. Dec 2, 2003

### wolram

i remember a referance to, binary pairs in the kuiper belt,
i can not remember if a mass for the objects was given
or orbital distance, my memory may be fading or wrong,
can someone comfirm or dispute the existence of these
objects?

2. Dec 2, 2003

### Nereid

Staff Emeritus
3. Dec 3, 2003

### wolram

thanks NEREID.

1998WW31 is an interesting duo, its a shame observation
time is so limited, do you or anyone have an insight
as to how much it costs for say an hours observation
time?

4. Dec 3, 2003

### Nereid

Staff Emeritus
Expensive!

It's an interesting question. Not very useful, as observing time isn't up for auction, except in the currency of proposal-quality.

A crude OOM: (cost of constructing and launching the HST + cost of Hubble repair and servicing Shuttle missions) / (total expected years of operation * duty cycle). That'd be a kinda capex answer; the opex answer would be simply the operating budget of the STScI (OOM, and a lower limit to be sure).

5. Dec 4, 2003

### wolram

from what little i have gleened, it seems observation
time is getting harder and harder to get, is this due
to funding or compeeting projects or other reason?

6. Dec 4, 2003

### Nereid

Staff Emeritus
Pure guess

I'm not sure that it is getting any harder. However, if it is, we can round up the usual suspects: demand continues to grow faster than supply (e.g. more astronomy - and physics? - PhDs than new observing time; average observing time requested per proposal is rising; available obseratory time actually declining (not likely)); inefficiency (unlikely); ...

7. Dec 4, 2003

### LURCH

If you are talking about observation time on the HST, I think the answer may be because the HST's total time is decreasing; it is scheduled for decommissioning soon.

8. Dec 4, 2003

### wolram

your replies seem totaly negative if there has been a time
for observation then this is it, theory is theory but
observation is truth ,if money or any other obstacle gets
in the way of observation then it can only be a hinderance
to our understanding, i just can not understand why the