Astronomical Observing from Fishcreek Observing Site
 Friday 7/29/2011 at 9:55:46pm (nautical twilight).
   This page last updated on Tuesday 7/26/2011 at 4:00pm

                    Sunset:  8:49pm
       Civil twilight ends:  9:17pm
    Nautical twilight ends:  9:56pm
Astronomical twilight ends: 10:39pm

Moon Phase: 0.79% illuminated (waning crescent)
      Rise: 4:57am
       Age: 28d 17h 2m 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 sets at 7:56pm this afternoon. 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 50 minutes after sunset and now lost in the glare of the setting sun
    Venus is now rising only 26 minutes before sunrise and now, like Mercury, lost in the glare of the Sun
    Earth is what you'll be standing on as you look up. ;^)
    Mars is a morning object now, rising 3 hours before sunrise
    Jupiter is a late-night object rising at 12:29am
    Saturn is visible in the evening and night. It sets at 11:41pm
    Uranus rises at 11:03pm
    Neptune rises at 9:42pm
 
  Pluto rises at sunset, but so incredibly small and dim that we can't see a thing in our telescopes!
    Moon sets at 7:56pm this afternoon and will be new in 16 hours. We're moon-free tonight

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 7/29/2011 at 9:55:46pm (nautical twilight)
Source: Guide8 software available from www.projectpluto.com

ABOVE HORIZON:
Object       Mag    Const     Rise     Set
Saturn       0.9     Vir     11:49   23:41
Neptune      7.8     Aqr     21:42   08:27
Pluto       14.2     Sgr     18:22   04:15

BELOW HORIZON:
Object       Mag    Const     Rise     Set
Sun        -26.7     Cnc     06:14   20:49
Mercury      1.1     Leo     08:26   21:39
Venus       -3.9     Cnc     05:48   20:36
Mars         1.4     Tau     03:07   18:21
Jupiter     -2.4     Ari     00:29   14:14
Uranus       5.8     Psc     23:03   11:21
Moon        -4.6     Gem     04:57   19:56

Sun data:
     Rise: 6:14am
     Transit: 1:32pm (Time of highest position in the sky, due South)
     Sets: 8:49pm
     Constellation: Cancer
     Distance: 1.01534253 AU = 151,893,080 km = 94,381,985 miles = 8.46 light-minutes
     Magnitude: -26.7
     Apparent size: 31.50 arcminutes in angular diameter

     Civil twilight ends at: 9:17pm ( When the Sun is 6 below the horizon )
     Nautical twilight ends at: 9:56pm ( When the Sun is 12 below the horizon )
     Astronomical twilight ends at: 10:39pm ( 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 7/29/2011 at 9:55:46pm the Sun will be 12 below the west-northwest horizon

Moon data:
     Rise: 4:57am
     Transit: 12:31pm (Time of highest position in the sky, due South)
     Sets: 7:56pm
     Constellation: Gemini
     Phase:  0.79% illuminated (waning crescent)
     Distance: 0.00251536 AU = 376,292 km = 233,817 miles = 1.26 light-seconds
     Magnitude: -4.6
     Apparent size: 31.75 arcminutes in angular diameter
     Elongation from Sun: 10.19 (morning sky)
     Age: 28d 17h 2m since last New Moon
     Prior Phase: Last Quarter on Saturday Jul 23, 2011 at 1:02am
      Next Phase: New Moon on Saturday Jul 30, 2011 at 2:40pm
     Next Lunar eclipse: Total eclipse (100%) on Sunday Sept 27, 2015 at 10:10pm EDT
     On 7/29/2011 at 9:55:46pm the Moon will be 19.2 below the northwest horizon

Mercury data:
     Rise: 8:26am
     Transit: 3:03pm (Time of highest position in the sky, due South)
     Sets: 9:39pm
     Constellation: Leo
     Phase:  27.32% illuminated
     Distance: .71626591 AU = 107,151,855 km = 66,581,077 miles = 5.97 light-minutes
     Magnitude: 1.1
     Apparent size: 9.39 arcseconds in angular diameter
     Elongation from Sun: 24.07 (evening sky)
     Next maximum elongations...
          Morning: Saturday, September 3, 2011 (18 06' 39")
          Evening: Monday, November 14, 2011 (22 44' 52")
     On 7/29/2011 at 9:55:46pm Mercury will be 4.2 below the west horizon

Venus data:
     Rise: 5:48am
     Transit: 1:12pm (Time of highest position in the sky, due South)
     Sets: 8:36pm
     Constellation: Cancer
     Phase:  99.64% illuminated
     Distance: 1.72510184 AU = 258,071,562 km = 160,358,236 miles = 14.37 light-minutes
     Magnitude: -3.9
     Apparent size: 9.67 arcseconds in ngular diameter
     Elongation from Sun: 4.88 (morning sky)
     Next maximum elongations...
          Evening: Tuesday, March 27, 2012 (46 02' 27")
          Morning: Wednesday, August 15, 2012 (45 48' 10")
     On 7/29/2011 at 9:55:46pm Venus will be 13.1 below the west-northwest horizon

Mars data:
     Rise: 3:07am
     Transit: 10:44am (Time of highest position in the sky, due South)
     Sets: 6:21pm
     Constellation: Taurus
     Phase:  95.12% illuminated
     Distance: 2.13611236 AU = 319,557,861 km = 198,564,052 miles = 17.79 light-minutes
     Magnitude: 1.4
     Apparent size: 4.38 arcseconds in angular diameter
     Elongation from Sun: 39.50 (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 7/29/2011 at 9:55:46pm Mars will be 24.2 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/home/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: 0:29am - Jul 30
     Transit: 7:22am - Jul 30 (Time of highest position in the sky, due South)
     Sets: 2:14pm - Jul 30
     Constellation: Aries
     Phase:  98.94% illuminated
     Distance: 4.88732028 AU = 731,132,707 km = 454,304,808 miles = 40.71 light-minutes
     Magnitude: -2.4
     Apparent size: 40.34 arcseconds in angular diameter
     Elongation from Sun: 87.82 (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 7/29/2011 at 9:55:46pm Jupiter will be 25.2 below the north-northeast horizon
 
     Next transit of the Great Red Spot: Friday Jul 29, 2011 at 11:48pm (The Red Spot transits about every 9 hours 56 minutes)
     GRS longitude: 163.2
     Jupiter satellite events (during darkness):
          Europa eclipse ends on Saturday Jul 30, 2011 at 0:37am when Jupiter is 0.2 above the horizon
          Europa occultation begins on Saturday Jul 30, 2011 at 0:56am when Jupiter is 3.7 above the horizon
          Europa occultation ends on Saturday Jul 30, 2011 at 3:20am when Jupiter is 30.6 above the horizon

Saturn data:
     Rise: 11:49am
     Transit: 5:45pm (Time of highest position in the sky, due South)
     Sets: 11:41pm
     Constellation: Virgo
     Phase:  99.77% illuminated
     Distance: 10.02189706 AU = 1,499,254,460 km = 931,593,543 miles = 1.39 light-hours
     Magnitude: 0.9
     Apparent size: 16.58 arcseconds in angular diameter
     Elongation from Sun: 65.63 (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 7/29/2011 at 9:55:46pm Saturn will be 18.3 above the west-southwest horizon

Uranus data:
     Rise: 11:03pm
     Transit: 5:12am - Jul 30 (Time of highest position in the sky, due South)
     Sets: 11:21am - Jul 30
     Constellation: Pisces
     Phase:  99.95% illuminated
     Distance: 19.52313158 AU = 2,920,618,913 km = 1,814,788,479 miles = 2.71 light-hours
     Magnitude: 5.8
     Apparent size: 3.61 arcseconds in angular diameter
     Elongation from Sun: 122.20 (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 7/29/2011 at 9:55:46pm Uranus will be 13.8 below the east-northeast horizon

Neptune data:
     Rise: 9:42pm
     Transit: 3:05am - Jul 30 (Time of highest position in the sky, due South)
     Sets: 8:27am - Jul 30
     Constellation: Aquarius
     Phase:  100.00% illuminated
     Distance: 29.07385315 AU = 4,349,386,524 km = 2,702,583,524 miles = 4.04 light-hours
     Magnitude: 7.8
     Apparent size: 2.35 arcseconds in angular diameter
     Elongation from Sun: 156.45 (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 7/29/2011 at 9:55:46pm Neptune will be 1.3 above the east horizon

Pluto (Dwarf Planet aka Asteroid 134340) data:
     Rise: 6:22pm
     Transit: 11:18pm (Time of highest position in the sky, due South)
     Sets: 4:15am - Jul 30
     Constellation: Sagittarius
     Phase:  99.99% illuminated
     Distance: 31.19836207 AU = 4,667,208,535 km = 2,900,068,968 miles = 4.33 light-hours
     Magnitude: 14.2
     Apparent size: 0.11 arcseconds in angular diameter
     Elongation from Sun: 148.55 (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 7/29/2011 at 9:55:46pm Pluto will be 26.9 above the south-southeast horizon
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