Due to a staffing shortage PMO will be closed Sep.13th we will reopen Sep. 14th
Visiting PMO in September (2019)
Note: The final weekend for tours at PMO this year is Sept. 27-28, weather permitting.
Sunsets at PMO continue to rapidly become earlier in September – from about 7:40 p.m. at the outset to before 7:00 p.m. at the end. Please arrive early (by sunset), especially if you want to see Jupiter and Saturn. (Jupiter is now low in the southwestern sky and will only be observable in PMO’s 24-inch telescope during evening twilight). Also, keep in mind that temperatures may dip into the 30s or 40s at night in September, even if it’s relatively warm in town during the day. Check the PMO weather page before heading out. Public viewing may conclude by 11 p.m., or sooner if the weather is poor.
Moon information for remainder of the month:
Sept. 13-14 – full moon is very bright and strongly interferes with viewing most sky objects except the planets. Also, PMO may need to be closed on Sept. 13 (see separate information to be posted).
Sept. 20-21 – last quarter moon rises by about 11 p.m.; and will not interfere with the first couple hours of “dark sky” viewing. Please expect that tours will end around 11 p.m., and we will not be able to wait until the moon is high enough in the sky to view.
Sept. 27-28 – new moon is invisible for the entire night, allowing the final opportunity of the season for excellent “dark sky” viewing (ideal for the so-called “deep sky” objects such as nebulas and galaxies). However, as noted above, this will only happen if the weather is good – always check in advance!
Planets: Besides Jupiter and Saturn during twilight before about 9 p.m., Uranus and Neptune will be visible later (by about 10 p.m., or at the end of our tours).
After September 28, we’re done with tours for the season, so don’t delay, or you’ll have to wait until next May. Thank you for your interest in PMO!