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 – July 2017”
Star Chart and Data
(courtesy of Ken Graun © 2017)

Astronomical Things to See and Do – July 2017

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

Planetary Phenomena

Planets in July '17LocationAvg MagnitudeAvg SizeNotes
MercuryIn evening sky all month-0.4 (fading)5.8"
VenusProminent at dawn; in Pisces-4.1 16.8"Passes 3 deg N of Moon on Jul 20th
MarsIn Sun glare.1.7 3.5"
JupiterLow evening sky-2.036.3"
SaturnEvening sky; in Ophiuchus.0.1 18.2"
UranusMorning sky in Pisces5.83.5"
NeptuneRises in late evening; Aquarius7.92.3"

Moon Phenomena

Moon PhenomenaDateTime (h : m UT)Comment
First QuarterJuly 1st00:51
FullJuly 9th04:07Summer Moon
Third QuarterJuly 16th19:26
NewJuly 23rd09:46Lunation
(Brown #)
First QuarterJuly 30th15:23

Meteor Showers

S δ-Aquariids, July 29th, peak at UT 4h, 20 per hour, Moon 35% illuminated.

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
M65 & 66*Galaxies11 20.2+12.59Leo
M88Galaxy12 32.0+14 25Coma Berenices
M84 & 86*Elliptical Galaxies12.26.2+12 57Virgo
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
*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