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
Public Night Reservations

Astro Calendar

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

Astronomical Things to See and Do – April 2017

Planetary Phenomena

Planets in Apr '17LocationAvg MagnitudeAvg SizeNotes
MercuryIn Sun's glare-1.8
VenusMorning sky; in Pisces-4.6 (brightening)51.9"
MarsIn Aries; in Taurus on the 12th1.5 (fading)4.1"Within 4 deg of the Pleiades late in April
JupiterIn Virgo-2.5 44.2"At opposition on April 7th
SaturnMorning sky in Sagittarius.0.4 17.3"
UranusIn Sun's glare5.93.3"
NeptuneIn morning sky for Southern observers7.92.2"

Moon Phenomena

Moon PhenomenonDateTime (h / m UT)Comment
First QuarterApr 3rd18 / 39
FullApr 11th6 / 8Pink Moon
Third QuarterApr 19th9 / 57
NewApr 26th12 / 16Lunation 1167

Meteor Showers

April Lyrids, April 22nd. Peak: 22 hr UT; 20 per hour.

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


Comet 41P/Tuttle-Giacobini-Kresak

Complete Ephemeris: http://cgi.minorplanetcenter.net/cgi-bin/returnprepeph.cgi?d=c&o=0041P

Finder Chart from Heavens Above: http://heavens-above.com/comet.aspx?cid=41P

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
NGC 5907Edge-on Galaxy15 15.9+56 20Draco
NGC 6543Cat's Eye Planetary Nebula17 58.6+66 38Draco
NGC 6826Blinking Planetary19 44.8+50 31Cygnus
M15Globular Cluster21 30.0+12 10Pegasus
M74Face-on Galaxy01 36.7+15 47Pisces
M31, 32, 110Galaxies*00 42.7+41 16Andromeda
NGC 7009Saturn Planetary Nebula21 04.2-11 22Aquarius
NGC 457ET or Owl Cluster01 19.9+58 20Casseiopeia
M77Seyfert Galaxy02 47.2-00 01Cetus
NGC 7662Blue Snowball - Planetary Nebula23 25.9+42 33Andromeda
NGC 253Silver Dollar Galaxy 0 47.6-25 17Sculptor
NGC 869/884Double Cluster 2 21.0+57 08Perseus
NGC 1023Lens-shaped Galaxy 2 40.4+39 04Perseus
M1Crab Nebula 5 34.5+22 01Taurus
NGC 1973-5-7Running Man 5 35.1 -04 44Orion
NGC 2403Galaxy 7 36.9 +65.36Camelopardalis
*If multiple, brightest component.

Observing Opportunities

Open House– Saturday, April 1st – 7:30 pm – 11 pm at DU’s Historic Chamberlin Observatory

EGK Dark Site – Any night or Dark Sky Weekend, March 24th – 26th – Messier Marathon on the 25th

DAS Volunteer Opportunities