ActivityGuide:ObservationSheetwww.globeatnight.org

2018CampaignDatesthatuseCanisMajor:Jan.6–15&Feb.5–14(forlatitudesgreaterthan30°S)andMarch8–17(forallsouthernlatitudes)

You are participating in a global campaign to observe andrecordthefainteststarsvisibleasameansofmeasuringlightpollution in a given location. By locating and observing theconstellationCanisMajorinthenightskyandcomparingittostellarcharts,peoplefromaroundtheworldwilllearnhowthelights in their community contribute to light pollution. Yourcontributionstotheonlinedatabasewilldocumentthevisiblenighttimesky.MaterialsNeeded:•GlobeatNightActivityPacket•Somethingtowriteon•Somethingtowritewith•Redlighttopreservenightvision• Optional: smart mobile device, GPS unit, or a topographicmaptodetermineyourlatitudeandlongitudeRememberSafetyFirst!• We encourage parents to do this activity with youngerchildren.Pleaseuse your judgment as towhether your childshouldbesupervisedoutsideafterdarkatyourlocation.• Be sure you arewearing suitable clothing for theweatherand forbeingoutsideatnight (lightcoloredand/orreflectiveclothing).•Whenchoosingthedarkestareainyourlocation,makesureyourchildisnotclosetotraffic,theedgeofabalcony,orneardangerinanyotherway.

MultipleObservations:Youcanentermorethanoneobservationbymovingtoanew location at least 1 km away from your originallocation.Don’t forget togetnew latitudeand longitudecoordinates. This can be done on the same night or onanothernightanytimeduringthedatesofthecampaign.

ChartsinthisdocumentwerepreparedbyJenikHollan,CzechGlobe

(http://amper.ped.muni.cz/jenik/astro/maps/GaNight/2018/).

FiveEasyStar-HuntingSteps:(www.globeatnight.org/5-steps.php)

1)Findyourlatitudeandlongitudeusinganyofthefollowing:a. the interactive tool in the web application atwww.globeatnight.org/webapp/. With a smart cell phoneor tablet, the latitude and longitude are automaticallydetermined as you report the observation. If you arereporting it later fromyour computer, input theaddressofthe observation or input your city. Zoom in/out and panarounduntilyou find theobservation location.The latitudeandlongitudewillbedisplayed.b. a GPS unit where you take a measurement. Report asmanydecimalplacesastheunitprovides.c.atopographicmapofyourarea.

2)Findyourconstellationbygoingoutsideat leastanhourafter sunset, approximately between 8-10 pm local time.Notefor latitudes>45NorthorSouth: duringthesummer,twilight may last beyond 10 pm. Once it’s dark, takemeasurementsifthere’snomoon.a.Determinethedarkestareabymovingtowherethemoststarsarevisible in thesky towardyourconstellation. Ifyouhaveoutsidelights,besuretheyarealloff.b.Waitoutsideforatleast10minutesforyoureyestoadapttothedarkness.Thisiscalledbecoming“dark-adapted.” c. Locate your constellation in the sky. For help use theappropriateconstellationFinderChartforyourlatitude.See(www.globeatnight.org/finding) preferably before goingoutside.

3)Matchyournighttimeskytooneofourmagnitudecharts(pp.2-3orwww.globeatnight.org/magcharts).a.Selectthechartthatmostcloselyresembleswhatyouareseeing.b.Estimatethecloudcoverinthesky.c.FillouttheObservationSheet(page4).

4) Report your observation online (if not done already bysmartmobiledevice)at:www.globeatnight.org/webapp/.a.Yourobservationscanbereportedonlineanytimeupto2weeksafterthecampaigndatesforthatmonthareover.b.Thereisacampaigneachmonththatistendayslong.Toparticipateinmorecampaigns,seewww.globeatnight.org.c. Next time, consider taking observations from differentlocations.

5)Compareyourobservationtothousandsaroundtheworldat:www.globeatnight.org/maps.php.

ActivityGuide:ObservationSheetwww.globeatnight.org

2018CampaignDatesthatuseCanisMajor:Jan.6–15&Feb.5–14(forlatitudesgreaterthan30°S)andMarch8–17(forallsouthernlatitudes)

Beforeheadingoutsidetomakeyourobservations,considervisitingwww.globeatnight.org/finding forinformationonhowtofindtheconstellationwithrespecttoyourlatitude.

Magnitude_Below_1_Chart

Magnitude_1_Chart

Magnitude_2_Chart

Magnitude_3_Chart

< 0.50 mag

Rigel

Sirius

< 1.50 mag

Rigel

Betelgeuse

Sirius

< 2.50 mag

Rigel

Betelgeuse

Sirius

< 3.50 mag

Rigel

Betelgeuse

Sirius

ActivityGuide:ObservationSheetwww.globeatnight.org

2018CampaignDatesthatuseCanisMajor:Jan.6–15&Feb.5–14(forlatitudesgreaterthan30°S)andMarch8–17(forallsouthernlatitudes)

Beforeheadingoutsidetomakeyourobservations,considervisitingwww.globeatnight.org/finding forinformationonhowtofindtheconstellationwithrespecttoyourlatitude.

Magnitude_4_Chart

Magnitude_5_Chart

Magnitude_6_Chart

Magnitude7_Chart

< 4.50 mag

Rigel

Betelgeuse

Sirius

41

< 5.50 mag

41

< 6.50 mag

41

< 7.50 mag

41

ActivityGuide:ObservationSheetwww.globeatnight.org

2018CampaignDatesthatuseCanisMajor:Jan.6–15&Feb.5–14(forlatitudesgreaterthan30°S)andMarch8–17(forallsouthernlatitudes)

Onlyfieldsmarkedby*arerequired.

*Month:____________*Day:____________ *Year:____________*ObservationTime:____:____PMlocaltime(HH:MM) *Country:_____________________*Latitude(indeg/min/sec _____deg____min_____sec (North/South)Circledirection.ordecimaldegrees): _________decimaldegrees *Longitude(indeg/min/sec _____deg____min_____sec (East/West)Circledirection.ordecimaldegrees): _________decimaldegreesCommentsonlocation:(e.g.Thereisonestreetlightwithin50mthatisshieldedfrommyview.)

*Matchyournighttimeskytooneofourmagnitudecharts:

¡Nostarsvisible ¡Magnitude1Chart ¡Magnitude2Chart ¡Magnitude3Chart

¡Magnitude4Chart ¡Magnitude5Chart ¡Magnitude6Chart ¡Magnitude7Chart

ReadingfromtheUnihedronSkyQualityMeter(ifapplicable):_________SerialnumberfromtheUnihedronSkyQualityMeter(optional):_________

*Estimatethecloudcoverinthesky:¡Clear ¡Cloudscover¼ofsky¡Cloudscover½ofsky ¡Cloudscovermorethan½ofsky

Commentsonskyconditions:(e.g.alittlehazetothenorth)

Reportonlineatwww.globeatnight.org/webapp/

< 0.50 mag

Rigel

Sirius

< 1.50 mag

Rigel

Betelgeuse

Sirius

< 2.50 mag

Rigel

Betelgeuse

Sirius

< 3.50 mag

Rigel

Betelgeuse

Sirius

< 4.50 mag

Rigel

Betelgeuse

Sirius

41

< 5.50 mag

41

< 6.50 mag

41

< 7.50 mag

41