Astronomical Observing from Fishcreek Observing Site
 Friday 7/22/2011 at 10:04:08pm (nautical twilight)
   This page last updated on Tuesday 7/19/2011 at 1:09pm

                    Sunset:  8:55pm
       Civil twilight ends:  9:24pm
    Nautical twilight ends: 10:04pm
Astronomical twilight ends: 10:50pm

Moon Phase: 51.14% illuminated (waning gibbous)
      Rise: 0:09am - Jul 23
       Age: 21d 17h 16m since last New Moon

We hope to see you here for a night under the stars - now in our sixteenth year!
Once again, we're Moon-free tonight since it won't be rising until after midnight and won't be visible above the trees until after 1:30am. You know what that means: the dim DSOs (Deep Space Objects) that we love to view will again be visible. Detail on the Moon will be excellent, but not until very late tonight. We'll have beautiful Saturn with its magnificent rings and moons, colorful double stars and open clusters made up of hundreds of stars that will look beautiful; the globular clusters will be fantastic as will the planetary nebula formed by dying stars. The diffuse nebula and emission nebula where stars are being born will be visible. Galaxies will be available to us, but difficult unless the night is perfectly clear.

How about the planets...which ones can we see tonight? 

    Sun is obviously unavailable to us, it IS night time after all. ;^)
    Mercury is setting an hour after sunset but very difficult see since it's lost in the glare of the sun.
    Venus is now visible in the morning, with difficulty, rising only 36 minutes before sunrise.
    Earth is what you'll be standing on as you look up. ;^)
    Mars is a morning object now, rising nearly 3 hours before sunrise.
    Jupiter is a late-night object rising at 12:54am.
    Saturn is visible in the evening and night. It sets at 12:08am.
    Uranus rises at 11:31pm.
    Neptune rises at 10:10pm.
 
  Pluto rises at sunset, but so incredibly small and dim that we can't see a thing in our telescopes!
    Moon is just past last quarter rising at 12:09am tonight and setting at 2:39pm tomorrow afternoon.

Click here for a list of DeepSky Objects that will be available to us this session.
All times are shown in EDT (Eastern Daylight Time (UT-4)) as seen from Stow, Ohio
Longitude: W 81 25' 38.4"
 Latitude: N41 11' 11.1"
 Altitude: 337m

The following Sun, Moon and planet detail was calculated as it
will be on Friday 7/22/2011 at 10:04:08pm (nautical twilight)
Source: Guide8 software available from www.projectpluto.com

ABOVE HORIZON:
Object       Mag    Const     Rise     Set
Saturn       0.9     Vir     12:14   00:07
Pluto       14.2     Sgr     18:50   04:43

BELOW HORIZON:
Object       Mag    Const     Rise     Set
Sun        -26.7     Cnc     06:08   20:55
Mercury      0.6     Leo     08:29   22:03
Venus       -3.9     Gem     05:32   20:34
Mars         1.4     Tau     03:15   18:26
Jupiter     -2.4     Ari     00:54   14:38
Uranus       5.8     Psc     23:31   11:49
Neptune      7.8     Aqr     22:10   08:56
Moon       -10.0     Psc     00:09   14:39

Sun data:
     Rise: 6:08am
     Transit: 1:32pm (Time of highest position in the sky, due South)
     Sets: 8:55pm
     Constellation: Cancer
     Distance: 1.01600098 AU = 151,991,583 km = 94,443,192 miles = 8.46 light-minutes
     Magnitude: -26.7
     Apparent size: 31.48 arcminutes in angular diameter

     Civil twilight ends at: 9:24pm ( When the Sun is 6 below the horizon )
     Nautical twilight ends at: 10:04pm ( When the Sun is 12 below the horizon )
     Astronomical twilight ends at: 10:50pm ( When the Sun is 18 below the horizon )

     Summer began at the Summer Solstice which occurred on Tuesday Jun 21, 2011 at 1:17pm
     Fall begins at the Autumnal Equinox which will occur on Friday Sep 23, 2011 at 5:05am

     Next Solar Eclipse: Partial eclipse (>80%) on Monday August 21, 2017 2:30pm EDT
     Next TOTAL Solar Eclipse: Monday April 8, 2024 at 3:15pm
     On 7/22/2011 at 10:04:08pm the Sun will be 12 below the west-northwest horizon

Moon data:
     Rise: 0:09am - Jul 23
     Transit: 7:20am - Jul 23 (Time of highest position in the sky, due South)
     Sets: 2:39pm - Jul 23
     Constellation: Pisces
     Phase:  51.14% illuminated (waning gibbous)
     Distance: 0.00271222 AU = 405,743 km = 252,117 miles = 1.36 light-seconds
     Magnitude: -10.0
     Apparent size: 29.44 arcminutes in angular diameter
     Elongation from Sun: 91.16 (morning sky)
     Age: 21d 17h 16m since last New Moon
     Prior Phase: Full Moon on Friday Jul 15, 2011 at 2:40am
      Next Phase: Last Quarter on Saturday Jul 23, 2011 at 1:02am
     Next Lunar eclipse: Total eclipse (100%) on Sunday Sept 27, 2015 at 10:10pm EDT
     On 7/22/2011 at 10:04:08pm the Moon will be 21 below the northeast horizon

Mercury data:
     Rise: 8:29am
     Transit: 3:17pm (Time of highest position in the sky, due South)
     Sets: 10:03pm
     Constellation: Leo
     Phase:  39.56% illuminated
     Distance: .811303 AU = 121,369,201 km = 75,415,326 miles = 6.76 light-minutes
     Magnitude: 0.6
     Apparent size: 8.29 arcseconds in angular diameter
     Elongation from Sun: 26.61 (evening sky)
     Next maximum elongations...
          Morning: Saturday, September 3, 2011 (18 06' 39")
          Evening: Monday, November 14, 2011 (22 44' 52")
     On 7/22/2011 at 10:04:08pm Mercury will be 1.2 below the west horizon

Venus data:
     Rise: 5:32am
     Transit: 1:03pm (Time of highest position in the sky, due South)
     Sets: 8:34pm
     Constellation: Gemini
     Phase:  99.30% illuminated
     Distance: 1.7179542 AU = 257,002,291 km = 159,693,822 miles = 14.31 light-minutes
     Magnitude: -3.9
     Apparent size: 9.71 arcseconds in ngular diameter
     Elongation from Sun: 6.76 (morning sky)
     Next maximum elongations...
          Evening: Tuesday, March 27, 2012 (46 02' 27")
          Morning: Wednesday, August 15, 2012 (45 48' 10")
     On 7/22/2011 at 10:04:08pm Venus will be 14.2 below the northwest horizon

Mars data:
     Rise: 3:15am
     Transit: 10:50am (Time of highest position in the sky, due South)
     Sets: 6:26pm
     Constellation: Taurus
     Phase:  95.47% illuminated
     Distance: 2.16031909 AU = 323,179,136 km = 200,814,208 miles = 17.99 light-minutes
     Magnitude: 1.4
     Apparent size: 4.33 arcseconds in angular diameter
     Elongation from Sun: 37.56 (morning sky)
     Dates of Opposition (when Mars is closest to Earth)
        Previous: Friday Jan 29, 2010 at 2:21pm.  Distance: 99,400,435 km.  Size: 14.08 arcseconds.
            Next: Saturday Mar 3, 2012 at 3:52pm.  Distance: 100,839,728 km.  Size: 13.88 arcseconds.
     On 7/22/2011 at 10:04:08pm Mars will be 24.5 below the north-northwest horizon

     Question: Will Mars be "as big as a Full Moon on August 27!" ???
       Answer: ABSOLUTELY NOT!!!

     Question: Will there be "Two Full Moons in the Sky!" ???
       Answer: ABSOLUTELY NOT!!!

     Mars was the closest in recorded history on August 27, but that was only in 2003, not every year!
     At that time, it appeared to be 1/75th the apparent diameter of the Moon!  NOT the "same size as the Full Moon".

     Please check these respected sites for their stories on the "Mars hoax" by clicking on the links below:
         http://www.skyandtelescope.com/observing/highlights/8708182.html
         http://www.snopes.com/science/astronomy/brightmars.asp
         http://www.hoax-slayer.com/mars-earth-close.html
         http://www.universetoday.com/2007/07/25/will-the-mars-look-as-big-as-the-moon-on-august-27-nope/

Jupiter data:
     Rise: 0:54am - Jul 23
     Transit: 7:46am - Jul 23 (Time of highest position in the sky, due South)
     Sets: 2:38pm - Jul 23
     Constellation: Aries
     Phase:  98.96% illuminated
     Distance: 4.99346074 AU = 747,011,094 km = 464,171,180 miles = 41.59 light-minutes
     Magnitude: -2.4
     Apparent size: 39.48 arcseconds in angular diameter
     Elongation from Sun: 81.88 (morning sky)
     Dates of Opposition (when Jupiter is closest to Earth)
        Previous: Tuesday Sep 21, 2010 at 7:28am
            Next: Friday Oct 28, 2011 at 9:37pm
     On 7/22/2011 at 10:04:08pm Jupiter will be 27.4 below the north-northeast horizon
 
     Next transit of the Great Red Spot: Friday Jul 22, 2011 at 11:01pm (The Red Spot transits about every 9 hours 56 minutes)
     GRS longitude: 163.0
     Jupiter satellite events (during darkness):
          None tonight

Saturn data:
     Rise: 12:14pm
     Transit: 6:11pm (Time of highest position in the sky, due South)
     Sets: 0:07am - Jul 23
     Constellation: Virgo
     Phase:  99.75% illuminated
     Distance: 9.91362997 AU = 1,483,057,935 km = 921,529,489 miles = 1.38 light-hours
     Magnitude: 0.9
     Apparent size: 16.76 arcseconds in angular diameter
     Elongation from Sun: 71.84 (evening sky)
     Dates of Opposition (when Saturn is closest to Earth)
        Previous: Sunday Apr 3, 2011 at 7:48pm
            Next: Sunday Apr 15, 2012 at 2:19pm
     On 7/22/2011 at 10:04:08pm Saturn will be 21.5 above the southwest horizon

Uranus data:
     Rise: 11:31pm
     Transit: 5:40am - Jul 23 (Time of highest position in the sky, due South)
     Sets: 11:49am - Jul 23
     Constellation: Pisces
     Phase:  99.95% illuminated
     Distance: 19.62564745 AU = 2,935,955,070 km = 1,824,317,925 miles = 2.72 light-hours
     Magnitude: 5.8
     Apparent size: 3.59 arcseconds in angular diameter
     Elongation from Sun: 115.42 (morning sky)
     Dates of Opposition (when Uranus is closest to Earth)
        Previous: Tuesday Sep 21, 2010 at 12:51pm
            Next: Sunday Sep 25, 2011 at 8:07pm
     On 7/22/2011 at 10:04:08pm Uranus will be 17.3 below the east-northeast horizon

Neptune data:
     Rise: 10:10pm
     Transit: 3:33am - Jul 23 (Time of highest position in the sky, due South)
     Sets: 8:56am - Jul 23
     Constellation: Aquarius
     Phase:  99.99% illuminated
     Distance: 29.12684178 AU = 4,357,313,510 km = 2,707,509,124 miles = 4.04 light-hours
     Magnitude: 7.8
     Apparent size: 2.34 arcseconds in angular diameter
     Elongation from Sun: 149.60 (morning sky)
     Dates of Opposition (when Neptune is closest to Earth)
        Previous: Friday Aug 20, 2010 at 5:59am
            Next: Monday Aug 22, 2011 at 7:18pm
     On 7/22/2011 at 10:04:08pm Neptune will be 2.3 below the east horizon

Pluto (Dwarf Planet aka Asteroid 134340) data:
     Rise: 6:50pm
     Transit: 11:47pm (Time of highest position in the sky, due South)
     Sets: 4:43am - Jul 23
     Constellation: Sagittarius
     Phase:  100.00% illuminated
     Distance: 31.13933802 AU = 4,658,378,663 km = 2,894,582,340 miles = 4.32 light-hours
     Magnitude: 14.2
     Apparent size: 0.11 arcseconds in angular diameter
     Elongation from Sun: 155.29 (evening sky)
     Dates of Opposition (when Pluto is closest to Earth)
        Previous: Tuesday Jun 28, 2011 at 1:23am
            Next: Friday Jun 29, 2012 at 11:03am
     On 7/22/2011 at 10:04:08pm Pluto will be 25.3 above the southeast horizon
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