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 Reservations



Astro Calendar

“What’s Out Tonight – May 2019”
Star Chart and Data
(courtesy of Ken Graun © 2019)

Astronomical Things to See and Do – May 2019

(NOTE: to find the MST for UT, subtract 7 hours from the UT listing)


46P/Wirtanen (2018) Ephemeris   (from In-the-sky.org)

Images and Sky Map on Weekly Comet News

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

Planetary Phenomena

Planets in May 2019LocationAvg MagnitudeAvg SizeNotes
MercuryMorning sky; Lost in morning twilight mid month-1.05.3"
VenusLow in SE morning sky-3.811.2"4 deg from Moon on the 2nd
MarsLow in western sky, in Taurus+1.72.5"
JupiterProminent in late evening-2.544.5"
SaturnIn Sagittarius (retrograde)+0.4 17.5"
Uranus02h 05m; in morning twilight after the 15th5.93.4"
Neptune23h 17m; in Aquarius.
Morning twilight

Moon Phases & Info: https://moon.nasa.gov/

Moon PhenomenaDateUTComment
New MoonMay 4th 22:45 Lunation 1192
1st QuarterMay 12th 01:12
Full MoonMay 18th 21:11Flower Moon
Third QuarterMay 26th 16:34

Meteor Showers This Month

Shower NameUT /peak hrDuration (Days)Hourly Rate (ZHR)% Above HorizonMoon Phase
Particle Size - r
(smaller# = larger size)
RADecv - speed (km/sec)Parent
Aquariids May 6th/8h560>0.32+ (waxing)2.4 22.30-0266 (very fast)

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


Notable Objects for Deep Sky Observers

Catalog #DescriptionRight
Spiral Galaxies9 55.6
9 55.8
+69 04
+69 41
Ursa Major
NGC 3628
Galaxies; Leo Trio11 18.9
11 20.2
11 20.3
+13 05
+12 59
+13 36
M85Spiral Galaxy12 25.4+18 11Coma
M102Spiral Galaxy 15 06.5+55 46Draco
M104Sombrero Galaxy12 40.0-11.37Virgo
M3Globular Cluster13 42.2+28 23Canes Venataci
NGC 6960, 6992/5, 7000Veil Nebula20 45.7 thru
+30.43 thru
NGC6888+Crescent Nebula
(Use nebular filter)
20 12.0+38 21Cygnus
NOTES*If multiple, brightest component.

Observing Opportunities

Open House – Saturday, May 11th 7:00 pm – 10:30 pm at DU’s Historic Chamberlin Observatory (Open to Public)

EGK Dark Site – Any night or Dark Sky Weekend, May 3rd-5th (Members & Guests)