April 2023 Night Sky


Another month has passed, the clocks changed and the nights are getting shorter. We might have less observing time, but at least the temperatures are improving!

Venus will continue to shine brightly in the evening sky this month and can be used to draw a line to the horizon which will pass through Mercury near the horizon. Look for both planets just after sunset in the west. Both Venus and Mercury will rise higher and higher until the 15th when Mercury starts to descend more each evening. On the 21st-23rd, look for the Moon, Mercury forming up vertically in the western sky.

Mars is still high in the night sky in Gemini this month and doesn’t set until around 1 am.

Finally we will get a meteor shower this month that isn’t obscured by a bright moon, this time we have the Lyrid meteor shower from April 14 to 30, peaking on April 22.

For more detailed position and timing information, see Jeff Stetekluh’s Observing Corner for detailed astronomical calculations: Jeff’s Corner

The Sun
  Apr  9  rises at 6:41 AM, sets at 7:39 PM

The Moon
  Apr 13  Last Quarter
  Apr 20  New Moon
  Apr 27  First Quarter

  Apr 11  Jupiter is in conjunction with the Sun (from Espenak)
  Apr 11  Mercury is at greatest eastern elongation (from Espenak)
  Apr 20  Hybrid Solar Eclipse (from Espenak)
  Apr 23  The Lyrid meteor shower peaks (active Apr 14 to Apr 30) (from IMO)

The Planets
                       Apr  9                        
              rises  transits      sets      
  Mercury   7:21 AM   2:19 PM   9:19 PM   
  Venus     8:24 AM   3:40 PM  10:57 PM   
  Mars     10:59 AM   6:31 PM   2:05 AM    
  Jupiter   6:52 AM   1:18 PM   7:43 PM     
  Saturn    4:57 AM  10:22 AM   3:47 PM   

            mag   diam  notes for Apr  9              
           ----  -----  ----------------             
  Mercury  -0.2   7.3"  W, 18*                        
  Venus    -4.1  14.7"  W, 36*                        
  Mars      1.1   6.1"  SW, 70*                      
  Jupiter  -2.0  33.1"                                
  Saturn    1.0  15.8"                                
  (* degrees elevation at sunset taking into account atmospheric refraction)
  (mag = apparent magnitude, diam = apparent equatorial angular diameter)
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