DAS Activities

DAS Public Nights

Public Nights
Tuesday and Thursday at
DU's Historic Chamberlin Observatory
Current start time is 8:30 pm
Costs to the public are:
$4.00 adults, $3.00 children

To book, please click:

Public Night

Astro Calendar

“What’s Out Tonight – September 2017”
Star Chart and Data
(courtesy of Ken Graun © 2017)

Astronomical Things to See and Do – September 2017

(NOTE: to find the MDT for UT, subtract 6 hours from the UT listing)

Planetary Phenomena

Planets in September '17LocationAvg MagnitudeAvg SizeNotes
MercuryMorning sky-0.2 (brightening)7.5"
VenusProminent at dawn-3.9 11.9"0.5 deg from Regulus on the 19-20th
MarsMorning sky in Leo1.8 3.6"
JupiterVery low evening sky-1.731.6"
SaturnLow SW evening sky0.5 16.7"
UranusRises mid-evening in Pisces5.73.7"1 deg N of Omicron Piscium mid-month
NeptuneVisible all night in Aquarius7.82.3"

Moon Phenomena

Moon PhenomenaDateTime (h : m UT)Comment
FullSeptember 7th18:11Harvest Moon
Last QuarterSeptember 13th01:15
NewSeptember 20th18:30Lunation 1172
First QuarterSeptember 28th08:13

Meteor Showers

American Meteor Society: http://www.amsmeteors.org/meteor-showers/meteor-shower-calendar/


Weekly Comet News: http://www.aerith.net/comet/weekly/current.html

NASA Web page on comets: http://nssdc.gsfc.nasa.gov/planetary/planets/cometpage.html

Notable Objects for Deep Sky Observers

Catalog #DescriptionRight
M81* & 82Galaxies09 55.6+69 04Ursa Major
M97Owl Nebula (PN)11 14.8+55 01Ursa Major
M51Whirlpool Galaxy13 29.9+47 12Canes Venatici
M106Spiral Galaxy12 19.0+47 18Canes Venatici
M13Hercules Globular Cluster16 41.7+36 28Hercules
M4Globular Cluster16 23.6-26 32Scorpius
M8Lagoon Nebula18 03.8-24 23Sagittarius
NGC 6826Blinking Planetary Nebula19 44.8+50 31Cygnus
NGC 5907Edge-on Spiral Galaxy15 15.9+56 20Draco
M6&7Star Clusters17 40.1-34 49Scorpius
M17Swan or Omega Nebula18 03.8-13 58Scorpius
*If multiple, brightest component.

Observing Opportunities

Open House– Saturday, July 29th – 8:30 pm – 11 pm at DU’s Historic Chamberlin Observatory

EGK Dark Site – Any night or Dark Sky Weekend, July 21st – 23rd

DAS Volunteer Opportunities