(Continued from Page 3)
21      Mon      Io occulted 12:10 a.m., eclipse ends 2:32 a.m.
                      Rosh Ha-Shanah (Jewish New Year 5759, at sunset 6:59 p.m.).
                      Io transit 9:18 to 11:33 p.m., shadow transit 9:28 to 11:43 p.m.
22      Tue      Ganymede transit begins 4:07 a.m., shadow transit begins 4:44 a.m.
                      Delta Cephei at maximum 10:32 p.m.  Variable rises to mag. 3.5 from 4.4 in about 1.5 days.               
                      (Period is 5.366341 days).  Compare Zeta Cephei (mag. 3.35) and Epsilon Cephei    (mag. 4.2).
                     Autumnal equinox 10:37 p.m.
23     Wed      Io eclipse ends 9:01 p.m.
25     Fri        Ganymede eclipse ends 9:53 p.m.
26     Sat        Europa transit 3:00 to 5:38 a.m., shadow transit begins 3:31 a.m.
                      Star party at Sycamore Grove Park (Livermore Park District) 8:00 p.m.
                           (Wetmore Rd. entrance near Holmes St.).
                      Galileo flyby of Europa.
27     Sun       Io transit begins 4:36 a.m., shadow transit begins 4:54 a.m.
                     Europa occulted 9:13 p.m., eclipse ends 12:34 a.m.
28     Mon      Io occulted 1:54 a.m., eclipse ends 4:27 a.m.
                      First Quarter Moon 2:11 p.m.
                      Io transit 11:02 p.m. to 1:17 a.m., shadow transit 11:23 p.m. to 1:38 a.m. (29th).
29     Tue       Io occulted 8:20 p.m., eclipse ends 10:56 p.m.
30     Wed     
Yom Kippur.
                     Beta Lyrae at minimum 11:04 p.m.

Planets
Mercury  Low in east before sunrise early in the   
               month.  Behind Sun late in the month.
Venus     Lost in morning twilight.
Mars       Low in east in morning sky.
Jupiter    At opposition; up all night.
Saturn    Rises in early evening; up nearly all  night.
Uranus   South in evening sky; sets in early  morning.
Neptune South in evening sky; sets in early  morning.
Pluto      Low in west-southwest in evening sky.

Messier and Caldwell objects
Cep       C4 (reflection neb.), C9 (Cave Neb.)
Lac        C16 (open cluster)
Cyg       M39 (open cluster), C19 (Cocoon Neb.)
Peg        M15 (globular cluster),
C30 (galaxy)
Del        C42 (globular cluster)
Aqr        M2 (globular cluster),
C55 (Saturn Neb.),           
             
C63 (Helix Neb.)
Cap       M30 (globular cluster)

Planet Watch Workshop at
Chabot Observatory & Science Center

September 25, 7:30 to 8:30 p.m., "High Resolution Portraits of the Planets,"  public lecture by Donald Parker.
September 25, 8:30 to 11:30 p.m., Observe Jupiter through Chabot's 20-inch refractor.
   The public lecture is limited to 90 participants, and the admission fee is $5 per person.

September 26, 9:00 a.m. to 5:00 p.m., Planet Watch Workshop, with observing from 9:00 p.m. to midnight.
   At least one dozen different workshop presentations on observing and photographing the planets. Special emphasis will be given to Jupiter and Mars, the August 11, 1999 total eclipse of the Sun, and the November 15, 1999 transit of Mercury. Workshop participation is limited to the first 40 registrants. The cost is $40 for Chabot Observatory members, $45 for non-members (includes lunch). To register call 510/530-3480 ext. 22.

Page 5        Prime Focus  September 1998                    <Previous Page   Next Page>