Astronomical Observing from the ACA Observatory
Saturday, 3/20/2010 at 8:00:00pm

Sunset: 7:41pm
Civil twilight ends: 8:06pm
Nautical twilight ends: 8:38pm
Astronomical twilight ends: 9:11pm
Moon Phase: 24.52% illuminated (waxing crescent)
Rise: 9:28am
Age: 5d 3h 36m since last New Moon
AND it will be RIGHT NEXT to the Pleiades!
All times are shown in EDT (Eastern Daylight Time (UT-4)) as seen from Akron, Ohio
Longitude: W 81 33' 39.0"
Latitude: N40 58' 11.3"
Altitude: 314m
The following Sun, Moon and planet detail was calculated as it will be on Saturday 3/20/2010
at 8:38:00pm (nautical twilight).
Data source: Guide8 software available from www.projectpluto.com
ABOVE HORIZON:
Object Mag Const Rise Set
Venus -3.9 Psc 08:10 21:01
Mars -0.1 Cnc 14:14 05:20
Saturn 0.5 Vir 19:29 07:51
Moon -8.8 Tau 09:28 01:04
BELOW HORIZON:
Object Mag Const Rise Set
Sun -26.7 Psc 07:26 19:41
Mercury -1.6 Psc 07:45 20:11
Jupiter -2.0 Aqr 06:57 18:19
Uranus 5.9 Psc 07:24 19:21
Neptune 8.0 Cap 06:13 16:52
Pluto 14.2 Sgr 02:53 12:52
Sun data:
Rise: 7:26am
Transit: 1:33pm (Time of highest position in the sky, due South)
Set: 7:41pm
Constellation: Pisces
Distance: .99603714 AU = 149,005,035 km = 92,587,437 miles = 8.3 light-minutes
Magnitude: -26.7
Apparent size: 32.11 arcminutes in angular diameter
Civil twilight ends at: 8:06pm ( When the Sun is 6° below the horizon )
Nautical twilight ends at: 8:38pm ( When the Sun is 12° below the horizon )
Astronomical twilight ends at: 9:11pm ( When the Sun is 18° below the horizon )
Spring began at the Vernal Equinox which occurred on Saturday Mar 20, 2010 at 1:33pm
Summer begins at the Summer Solstice which will occur on Monday Jun 21, 2010 at 7:29am
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 3/20/2010 at 8:38:00pm the Sun will be 12° below the west horizon
Moon data:
Rise: 9:28am
Transit: 5:13pm (Time of highest position in the sky, due South)
Set: 1:04am - Mar 21
Constellation: Taurus
Phase: 24.52% illuminated (waxing crescent)
Distance: 0.00254271 AU = 380,384 km = 236,360 miles = 1.27 light-seconds
Magnitude: -8.8
Apparent size: 31.40 arcminutes in angular diameter
Elongation from Sun: 59.24° (evening sky)
Age: 5d 3h 36m since last New Moon
Prior Phase: New Moon on Monday Mar 15, 2010 at 5:01pm
Next Phase: First Quarter on Tuesday Mar 23, 2010 at 7:00am
Next Lunar eclipse: Total eclipse (100%) on Sunday Sept 27, 2015 at 10:10pm EDT
On 3/20/2010 at 8:38:00pm the Moon will be 45° above the west-southwest horizon
and will appear like this:

Mercury data:
Rise: 7:45am
Transit: 1:57pm (Time of highest position in the sky, due South)
Set: 8:11pm
Constellation: Pisces
Phase: 97.01% illuminated
Distance: 1.29857326 AU = 194,263,795 km = 120,709,927 miles = 10.82 light-minutes
Magnitude: -1.6
Apparent size: 5.18 arcseconds in angular diameter
Elongation from Sun: 6.45° (evening sky)
Next maximum elongations...
Evening: Thursday, April 8, 2010 (19° 21' 01")
Morning: Wednesday, May 26, 2010 (25° 07' 48")
On 3/20/2010 at 8:38:00pm Mercury will be 6.1° below the west horizon
Venus data:
Rise: 8:10am
Transit: 2:35pm (Time of highest position in the sky, due South)
Set: 9:01pm
Constellation: Pisces
Phase: 96.02% illuminated
Distance: 1.62086785 AU = 242,478,379 km = 150,669,081 miles = 13.5 light-minutes
Magnitude: -3.9
Apparent size: 10.29 arcseconds in angular diameter
Elongation from Sun: 16.50° (evening sky)
Next maximum elongations...
Evening: Friday, August 20, 2010 (45° 57' 59")
Morning: Saturday, January 8, 2011 (46° 57' 24")
On 3/20/2010 at 8:38:00pm Venus will be 3.3° above the west horizon
Mars data:
Rise: 2:14pm
Transit: 9:47pm (Time of highest position in the sky, due South)
Set: 5:20am - Mar 21
Constellation: Cancer
Phase: 92.86% illuminated
Distance: .92113234 AU = 137,799,437 km = 85,624,602 miles = 7.67 light-minutes
Magnitude: -0.1
Apparent size: 10.16 arcseconds in angular diameter
Elongation from Sun: 120.57° (evening 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.
No, Mars was *not* "...as big as a Full Moon on August 27!"
Please click the following links for more information about this annual 'Mars Hoax'
Sky&Telescope
Snopes
Hoax-Slayer
UniverseToday
On 3/20/2010 at 8:38:00pm Mars will be 66.9° above the southeast horizon
Jupiter data:
Rise: 6:57am
Transit: 12:38pm (Time of highest position in the sky, due South)
Set: 6:19pm
Constellation: Aquarius
Phase: 99.93% illuminated
Distance: 5.93787736 AU = 888,293,809 km = 551,960,190 miles = 49.46 light-minutes
Magnitude: -2.0
Apparent size: 33.20 arcseconds in angular diameter
Elongation from Sun: 15.64° (morning sky)
Dates of Opposition (when Jupiter is closest to Earth)
Previous: Friday Aug 14, 2009 at 1:44pm
Next: Tuesday Sep 21, 2010 at 7:28am
Next transit of the Great Red Spot: Saturday Mar 20, 2010 at 10:17pm
(the Red Spot transits about every 10 hours 56 minutes)
GRS longitude: 142.9
Jupiter satellite events (during darkness):
None
On 3/20/2010 at 8:38:00pm Jupiter will be 27.1° below the west horizon
Saturn data:
Rise: 7:29pm
Transit: 1:40am - Mar 21 (Time of highest position in the sky, due South)
Set: 7:51am - Mar 21
Constellation: Virgo
Phase: 100.00% illuminated
Distance: 8.50392149 AU = 1,272,168,547 km = 790,488,897 miles = 1.18 light-hours
Magnitude: 0.5
Apparent size: 19.54 arcseconds in angular diameter
Elongation from Sun: 177.22° (morning sky)
Dates of Opposition (when Saturn is closest to Earth)
Previous: Sunday Mar 8, 2009 at 3:44pm
Next: Sunday Mar 21, 2010 at 8:28pm
On 3/20/2010 at 8:38:00pm Saturn will be 11.8° above the east horizon
Uranus data:
Rise: 7:24am
Transit: 1:22pm (Time of highest position in the sky, due South)
Set: 7:21pm
Constellation: Pisces
Phase: 100.00% illuminated
Distance: 21.08977081 AU = 3,154,984,806 km = 1,960,416,695 miles = 2.93 light-hours
Magnitude: 5.9
Apparent size: 3.34 arcseconds in angular diameter
Elongation from Sun: 3.58° (morning sky)
Dates of Opposition (when Uranus is closest to Earth)
Previous: Thursday Sep 17, 2009 at 5:34am
Next: Tuesday Sep 21, 2010 at 12:51pm
On 3/20/2010 at 8:38:00pm Uranus will be 15.6° below the west horizon
Neptune data:
Rise: 6:13am
Transit: 11:32am (Time of highest position in the sky, due South)
Set: 4:52pm
Constellation: Capricornus
Phase: 99.99% illuminated
Distance: 30.85375149 AU = 4,615,655,525 km = 2,868,035,412 miles = 4.28 light-hours
Magnitude: 8.0
Apparent size: 2.21 arcseconds in angular diameter
Elongation from Sun: 32.90° (morning sky)
Dates of Opposition (when Neptune is closest to Earth)
Previous: Monday Aug 17, 2009 at 4:47pm
Next: Friday Aug 20, 2010 at 5:59am
On 3/20/2010 at 8:38:00pm Neptune will be 42.9° below the west-northwest horizon
Pluto data: (Dwarf Planet aka Asteroid 134340)
Rise: 2:53am - Mar 21
Transit: 7:53am - Mar 21 (Time of highest position in the sky, due South)
Set: 12:52pm - Mar 21
Constellation: Sagittarius
Phase: 99.98% illuminated
Distance: 31.87578115 AU = 4,768,548,986 km = 2,963,039,006 miles = 4.43 light-hours
Magnitude: 14.2
Apparent size: 0.10 arcseconds in angular diameter
Elongation from Sun: 84.97° (morning sky)
Dates of Opposition (when Pluto is closest to Earth)
Previous: Tuesday Jun 23, 2009 at 3:49am
Next: Friday Jun 25, 2010 at 2:59pm
On 3/20/2010 at 8:38:00pm Pluto will be 65.4° below the north-northeast horizon
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