Orson Pratt Observatory - Usage Statistics

Below we give a breakdown of the time used on the David Derrick 0.4-m telescope (DDT) since its installations in the Spring of 1998.  As shown, we have averaged almost 100 nights of observing per year for the last 12 years.  The majority of this observing has been done by undergraduate students.  The monthly breakdown should not be viewed as the number of clear nights for each month, since it is heavy affected by the time the students can commit to observing during the normal semesters.  This is probably most notable in April when we are getting near the end of the semester and observing slows down dramatically, even if the weather is clear.  A similar effect appears in August when we lose our summer REU students part way through the month.

Yearly Usage of David Derrick Telescope
Year Nights Used
1998 72 (not a full year)
1999 116
2000 86
2001 137
2002 105
2003 103
2004 79
2005 107
2006 75
2007 100
2008 70
2009 80
2010 58
2011 25 (current)
Average 98.2 per full year

 

Monthly Usage of David Derrick Telescope
Month Average Nights (High) (2011)
January 4.6 (8) (8)
February 9.2 (15) (13)
March 10.5 (21) (4)
April 4.9 (9) (--)
May 9.6 (22) (--)
June 10.3 (19) (--)
July 11.9 (19) (--)
August 8.0 (10) (--)
September 7.0 (14) (--)
October 6.9 (18) (--)
November 4.6 (9) (--)
December 1.4 (2) (--)
People Using the David Derrick Telescope
Group Percentage of Nights
Faculty 24.3
Graduate Students 12.8
Undergraduate Students 74.8

Takes into account nights with mixed groups