The Sky This Month: June—July 2003

Upcoming Events:
 
Jun 19 Thu Mars 1.7° N of Moon (2 am)
Jun 21 Sat Mercury 0.4° S of Venus (dawn)
Jun 21 Sat Last quarter Moon
Jun 21 Sat Summer Solstice
Jun 21 Sat David Dunlap Observatoryobserving
Jun 23—26 Mon—Thu Deep Sky Observing (first clear night)
Jun 28 Sat David Dunlap Observatoryobserving
Jun 29 Sun New Moon
Jul 2—3 Wed—Thu Public Star Night: Ontario Science Centre (first clear night) * * * * * C A N C E L L E D * * * * *
Jul 4 Fri Earth at aphelion
Jul 4—5 Fri—Sat David Dunlap Observatoryobserving
Jul 6 Sun First quarter Moon
Jul 11—12 Fri—Sat David Dunlap Observatoryobserving
Jul 13 Sun Full Moon

Heroes and Horrors: Hercules, Ophiuchus, Serpens, Scorpius

Double stars:
 
Star Colour Magnitude Separation Position Angle
a Alpha Herculis orange green 3.5 5.4 4.7" 107°
d Delta Herculis white blue 3.1 8.2 8.9" 236°
r Rho Herculis white white 4.6 5.6 4.1" 316°
o Omicron Ophiuchi orange yellow 5.4 6.9 10.3" 355°
d Delta Serpentis yellow yellow 4.2 5.2 3.9" 178°
q Theta Serpentis blue blue 4.5 5.4 22.3" 104°

Variables:
 
Name Type Range Per Charts
W Her Mira 8.3-13.5 280d http://www.aavso.org/charts/HER/W_HER/WHER-B.GIF
http://www.aavso.org/charts/HER/W_HER/WHER-D.GIF
http://www.aavso.org/charts/HER/W_HER/WHER-E.GIF
R Oph Mira 7.6-13.3 306d http://www.aavso.org/charts/OPH/R_OPH/ROPH-A.GIF
http://www.aavso.org/charts/OPH/R_OPH/ROPH-B.GIF
http://www.aavso.org/charts/OPH/R_OPH/ROPH-D.GIF

Deep sky objects:
 
Object NSOG Type Magnitude Surface brightness
Her: Messier 13 ***** GlobClust 5.9 ?
Oph: Messier 10 ***** GlobClust 6.6 ?
Oph: Messier 62 ***** GlobClust 6.6 ?
Oph: Messier 19 ***** GlobClust 7.2 ?
Ser: Messier 5 ***** GlobClust 5.8 ?
Sco: Messier 4 ***** GlobClust 5.9 ?