Astronomical Observing at the Fishcreek Observing Site
Friday - 7/16/2010  9:30 pm

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Tonight, we have a 34% illuminated crescent Moon setting at 11:40pm.  This phase is perfect for viewing detail in the craters on or near the terminator - the line separating lunar night from day, where a wealth of features can be seen. Faint DSOs (Deep Space Objects) will be available after 11:40pm and Saturn will be beautiful with its rings still nearly edge-on and several moons visible. Also, we have Venus showing a gibbous phase, and Mars growing smaller every night. We have the colorful double stars, open clusters made up of hundreds of stars, the globular clusters comprised of hundreds of thousands of stars, planetary nebula formed by dying stars, diffuse nebula and emission nebula where stars are being born.  Galaxies will be visible in our telescopes this evening following Moonset.

Click HERE for a list of DeepSky Objects that will be available to us this session.

We hope to see you here for a night under the stars - now in our fifteenth year!

- - - - - - Our location - - - - - -

Longitude:

W 81 25' 38.4"
Latitude: N 41 11' 11.1"
Altitude:

 337m

Note: All times are shown in EDT (Eastern Daylight Time (UT-4)) as seen from Stow, Ohio
 

The following Sun, Moon and planet detail was calculated as it will be
on Friday 7
/16/2010 at 10:09:53pm EDT (nautical twilight)
Source: Guide8 software available from www.projectpluto.com

Above Horizon Below Horizon Constellation Mag Rises Sets
  Sun Gemini -26.7 06:03 20:59
  Mercury Cancer -0.4 07:35 22:05
Venus   Leo -4.1 09:42 23:05
Mars   Leo 1.4 11:00 23:37
  Jupiter Pisces -2.6 23:54 12:04
Saturn   Virgo 1.1 11:36 00:02
  Uranus Pisces 5.8 23:45 11:51
  Neptune Aquarius 7.8 22:27 09:08
Pluto   Sagittarius 14.2 19:02 04:59
Moon   Virgo -9.4 11:59 23:40
Click HERE for information on the planets such as orbital and rotational periods, velocities, distances, etc. not listed in the detail provided below.

Quick links:
    Inner Solar System     Outer Solar System

Sun data
 
Rises:

6:03am

Transits:

1:31pm - Time of highest position in the sky, due South

Sets:

8:59pm

Constellation:

Gemini

Distance:

1.01637748 AU = 152,047,907 km = 94,478,190 miles = 8.47 light-minutes

Magnitude:

-26.7

Apparent size:

31.47 arcminutes in angular diameter

Twilight ends...

Civil:

  9:29pm - Sun is   6 below the horizon

Nautical:

10:10pm - Sun is 12 below the horizon

Astronomical:

10:57pm - Sun is 18 below the horizon

Summer began:

at the Summer Solstice which occurred on Monday Jun 21, 2010 at 7:29am

Fall begins:

at the Autumnal Equinox which will occur on Wednesday Sep 22, 2010 at 11:10pm

Next Solar Eclipses in Stow, Ohio:
    Partial eclipse (>80%) on Monday August 21, 2017 2:30pm EDT
    Total eclipse (an amazing sight!) on Monday April 8, 2024 2:15pm EST (3:15pm EDT)

On 7/16/2010 at 10:09:53pm the Sun will be 12 below the west-northwest horizon

Click
HERE for additional data on the Sun

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Moon data
 
Rises:

11:59am

Transits:

  5:55pm (Time of highest position in the sky, due South)

Sets:

11:40pm

Constellation:

Virgo

Phase:

34.96% illuminated (waxing crescent)

Distance:

0.00246086 AU = 368,139 km = 228,751 miles = 1.23 light-seconds

Magnitude:

-9.4

Apparent size:

32.45 arcminutes in angular diameter

Elongation from Sun:

72.36 (evening sky)

Age:

5d 6h 28m since last New Moon

Prior Phase:

New Moon on Sunday Jul 11, 2010 at 3:40pm

Next Phase:

First Quarter on Sunday Jul 18, 2010 at 6:11am

Next Lunar eclipse:

Total eclipse (100%) on Sunday Sept 27, 2015 at 10:10pm EDT


On 7/16/2010 at 10:09:53pm the Moon will be 14.6 above the southwest horizon
and will look like this in our telescopes at very low power*

 

*How do we change the "power" (magnification) of our telescopes?
Simple!  By changing the eyepiece to one of a longer or shorter focal length.
If the eyepiece is of shorter focal length, the "power" (magnification) is higher,
If he eyepiece is of longer focal length, the "power" (magnification) is lower.
By how much?  Here's the formula:

Magnification =F focal length of telescope objective lens (or mirror)
focal length of eyepiece being used      

Note: All graphics are correct-image representations.  A telescope will reverse this left-right and possibly invert up-down depending on type of equipment being used.

Click HERE for additional data on the Moon

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Mercury data
 
Rises:

  7:35am

Transits:

  2:51pm - Time of highest position in the sky, due South

Sets:

10:05pm

Constellation:

Cancer

Phase:

77.96% illuminated

Distance:

1.18475005 AU = 177,236,085 km = 110,129,399 miles = 9.87 light-minutes

Magnitude:

-0.4

Apparent size:

5.68 arcseconds in angular diameter

Elongation from Sun:

19.10 (evening sky)

Next maximum elongations...
Evening:

Saturday, August 7, 2010 (27 22' 00")

Morning:

Sunday, September 19, 2010 (17 52' 13")


On 7/16/2010 at 10:09:53pm Mercury will be 1.9
below the west-northwest horizon

Click HERE for additional data on Mercury

(back to 'Quick Links')

 

Venus data
 
Rises:

  9:42am

Transits:

  4:24pm - Time of highest position in the sky, due South

Sets:

11:05pm

Constellation:

Leo

Phase:

64.55% illuminated

Distance:

.95449837 AU = 142,790,924 km = 88,726,168 miles = 7.95 light-minutes

Magnitude:

-4.1 (extremely bright, the brightest thing in the evening sky except for the Moon)

Apparent size:

17.48 arcseconds in angular diameter

Elongation from Sun:

42.96 (evening sky)

Next maximum elongations...
Evening:

Friday, August 20, 2010 (45 57' 59")

Morning:

Saturday, January 8, 2011 (46 57' 24")


On 7/16/2010 at 10:09:53pm Venus will be 9.2 above the west horizon
and will look like this in our telescopes at high power...


Click HERE for additional data on Venus

(back to 'Quick Links')

 

Mars data
 
Rises:

11:00am

Transits:

  5:19pm - Time of highest position in the sky, due South

Sets:

11:37pm

Constellation:

Leo

Phase:

92.27% illuminated

Distance:

1.90259525 AU = 284,624,198 km = 176,857,279 miles = 15.85 light-minutes

Magnitude:

1.4

Apparent size:

4.92 arcseconds in angular diameter

Elongation from Sun:

57.83 (evening sky)

Dates of Opposition (when Mars is closest to the 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 7/16/2010 at 10:09:53pm Mars will be 15.4 above the west-southwest horizon

No, Mars will *not* be "as big as a Full Moon on August 27!"
Please see the following links for more information about this annual 'Mars Hoax'
    Sky & Telescope article
    Snopes.com article
    Hoax-slayer article
    Universe Today article

Click HERE for additional data on Mars

(back to 'Quick Links')

 

Jupiter data
 
Rises:

11:54pm

Transits:

  5:59am - Jul 17 - Time of highest position in the sky, due South

Sets:

12:04pm - Jul 17

Constellation:

Pisces

Phase:

99.08% illuminated

Distance:

4.50860625 AU = 674,477,895 km = 419,101,139 miles = 37.55 light-minutes

Magnitude:

-2.6

Apparent size:

43.73 arcseconds in angular diameter

Elongation from Sun:

111.09 (morning sky)

Dates of Opposition (when Jupiter is closest to the 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 Jul 17, 2010 at 6:04am (The Red Spot transits about every 9 hours 56 minutes)
GRS longitude: 145.2
Jupiter moons activity (during darkness):
        None

On 7/16/2010 at 10:09:53pm Jupiter will be 20.5 below the east-northeast horizon

Click HERE for additional data on Jupiter

(back to 'Quick Links')

 

Saturn data
 
Rises:

11:36am

Transits:

  5:49pm - Time of highest position in the sky, due South

Sets:

  0:02am - Jul 17

Constellation:

Virgo

Phase:

99.77% illuminated

Distance:

9.91535371 AU = 1,483,315,802 km = 921,689,720 miles = 1.38 light-hours

Magnitude:

1.1

Apparent size:

16.76 arcseconds in angular diameter

Elongation from Sun:

65.25 (evening sky)

Dates of Opposition (when Saturn is closest to the Earth)

Previous:

Sunday Mar 21, 2010 at 8:28pm

Next:

Sunday Apr 3, 2011 at 7:48pm


On 7/16/2010 at 10:09:53pm Saturn will be 19.9 above the west-southwest horizon
and will look like this in our telescopes at high power...

Note: All graphics are correct-image representations.  A telescope will reverse this left-right and possibly invert up-down depending on type of equipment being used.

Click HERE for additional data on Saturn

(back to 'Quick Links')

 

Uranus data
 
Rises:

11:45pm

Transits:

  5:48am - Jul 17 - Time of highest position in the sky, due South

Sets:

11:51am - Jul 17

Constellation:

Pisces

Phase:

99.95% illuminated

Distance:

19.66045842 AU = 2,941,162,716 km = 1,827,553,806 miles = 2.73 light-hours

Magnitude:

5.8

Apparent size:

3.58 arcseconds in angular diameter

Elongation from Sun:

113.89 (morning sky)

Dates of Opposition (when Uranus is closest to the Earth)

Previous:

Thursday Sep 17, 2009 at 5:34am

Next:

Tuesday Sep 21, 2010 at 12:51pm


On 7/16/2010 at 10:09:53pm Uranus will be 18.9 below the east-northeast horizon

Click HERE for additional data on Uranus

(back to 'Quick Links')

 

Neptune data
 
Rises:

10:27pm

Transits:

  3:47am - Jul 17 - Time of highest position in the sky, due South

Sets:

  9:07am - Jul 17

Constellation:

Aquarius

Phase:

99.99% illuminated

Distance:

29.1683767 AU = 4,363,527,046 km = 2,711,370,037 miles = 4.05 light-hours

Magnitude:

7.8

Apparent size:

2.34 arcseconds in angular diameter

Elongation from Sun:

146.26 (morning sky)

Dates of Opposition (when Neptune is closest to the Earth)

Previous:

Monday Aug 17, 2009 at 4:47pm

Next:

Friday Aug 20, 2010 at 5:59am


On 7/16/2010 at 10:09:53pm Neptune will be 4.3 below the east horizon

Click HERE for additional data on Neptune

(back to 'Quick Links')

 

Pluto (Dwarf Planet aka Asteroid 134340) data
 
Rises:

7:02pm

Transits:

0:01am - Jul 17 - Time of highest position in the sky, due South

Sets:

4:59am - Jul 17

Constellation:

Sagittarius

Phase:

100.00% illuminated

Distance:

30.91780946 AU = 4,625,238,462 km = 2,873,989,973 miles = 4.29 light-hours

Magnitude:

14.2

Apparent size:

0.11 arcseconds in angular diameter

Elongation from Sun:

158.56 (evening sky)

Dates of Opposition (when Pluto is closest to the Earth)

Previous:

Friday Jun 25, 2010 at 2:59pm

Next:

Tuesday Jun 28, 2011 at 1:23am


On 7/16/2010 at 10:09:53pm Pluto will be 25.1 above the southeast horizon

Click HERE for additional data on Pluto

(back to 'Quick Links')


Inner Solar System - the Sun, Mercury, Venus and Earth
(Created using Software Bisque's
TheSky software)


(back to 'Quick Links')
 

Outer Solar System - the Sun, Mars, Jupiter, Uranus, Neptune and Pluto
(Created using Software Bisque's
TheSky software)


(back to 'Quick Links')
 

Click HERE for event status

Click
HERE for a printer-friendly version of the information on this page.

Click
HERE for general Information you should know about our events - Q&A of Where, When and What.

Click
HERE for satellite passes this evening

Very sincerely yours,
Dave Jessie
"Time spent observing the heavens is not deducted from your life span"

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