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

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

Tonight, we have a bright gibbous Moon with us, but not until it clears the trees to the east of the observing field at midnight.  This phase is great for viewing detail in the craters on or near the terminator - the line separating lunar night from day, a wealth of features can still be seen.  Although nearly painfully bright, we have a new piece of equipment that makes the view comfortable.  Faint DSOs (Deep Space Objects) will be available to us prior to that, however.  Saturn will be beautiful with its rings still nearly edge-on and with four of its moons visible. Also, we have Mercury & Venus showing gibbous phases, 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 should be visible this evening despite the brightening of the sky by the Moon.

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 7/30/2010 at 9:54:11pm (nautical twilight)

Source: Guide8 software available from www.projectpluto.com

Above Horizon Below Horizon Constellation Mag Rises Sets
  Sun Cancer -26.7 06:15 20:47
  Mercury Leo 0.2 08:32 21:55
Venus   Leo -4.2 10:06 22:41
Mars   Virgo 1.5 10:48 23:01
  Jupiter Pisces -2.7 22:59 11:09
Saturn   Virgo 1.1 10:47 23:09
  Uranus Pisces 5.8 22:49 10:55
Neptune   Aquarius 7.8 21:31 08:11
Pluto   Sagittarius 14.2 18:06 04:03
  Moon Pisces -11.1 22:30 11:48
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:

6:15am

Transits:

1:32pm - Time of highest position in the sky, due South

Sets:

8:47pm

Constellation:

Cancer

Distance:

1.01511209 AU = 151,858,607 km = 94,360,565 miles = 8.46 light-minutes

Magnitude:

-26.7

Apparent size:

31.51 arcminutes in angular diameter

Twilight ends...

Civil:

  9:16pm - Sun is   6 below the horizon

Nautical:

  9:54pm - Sun is 12 below the horizon

Astronomical:

10:37pm - 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 7/30/2010 at 9:54:11pm the Sun will be 12 below the west-northwest horizon

Click
HERE for additional data on the Sun

(back to 'Quick Links')

 

Moon data
 
Rises:

10:30pm

Transits:

  5:04am - Jul 31 (Time of highest position in the sky, due South)

Sets:

11:48am - Jul 31

Constellation:

Pisces

Phase:

78.57% illuminated (waning gibbous)

Distance:

0.00270541 AU = 404,724 km = 251,484 miles = 1.35 light-seconds

Magnitude:

-11.1

Apparent size:

29.52 arcminutes in angular diameter

Elongation from Sun:

124.72 (morning sky)

Age:

19d 6h 14m since last New Moon

Prior Phase:

Full Moon on Sunday Jul 25, 2010 at 9:37pm

Next Phase:

Last Quarter on Tuesday Aug 3, 2010 at 12:59am

Next Lunar eclipse:

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


On 7/30/2010 at 9:54:11pm the Moon will be 7.9 below the east-northeast horizon
but will look like this in our telescopes at very low power* when it clears the trees to the east of the observing field at midnight
      


*
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

(back to 'Quick Links')

 

Mercury data
 
Rises:

8:32am

Transits:

3:14pm - Time of highest position in the sky, due South

Sets:

9:55pm

Constellation:

Leo

Phase:

58.57% illuminated

Distance:

0.98809104 AU = 147,816,315 km = 91,848,801 miles = 8.23 light-minutes

Magnitude:

0.2

Apparent size:

6.81 arcseconds in angular diameter

Elongation from Sun:

26.33 (evening sky)

Next maximum elongations...
Evening:

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

Morning:

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


On 7/30/2010 at 9:54:11pm Mercury will be 0.9
below the west horizon
Mercury will be a little over 6 above the horizon at the time of Civil Twilight, so we may be able to see it!


Click HERE for additional data on Mercury

(back to 'Quick Links')

 

Venus data
 
Rises:

10:06am

Transits:

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

Sets:

10:41pm

Constellation:

Leo

Phase:

58.53% illuminated

Distance:

0.8441575 AU = 126,284,165 km = 78,469,343 miles = 7.03 light-minutes

Magnitude:

-4.2 (extremely bright, the brightest thing in the evening sky except for the Moon)

Apparent size:

19.77 arcseconds in angular diameter

Elongation from Sun:

44.79 (evening sky)

Next maximum elongations...
Evening:

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

Morning:

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


On 7/30/2010 at 9:54:11pm Venus will be 7.7 above the west-southwest horizon
and will look like this in our telescopes at high power at the time of Civil Twilight...


Click HERE for additional data on Venus

(back to 'Quick Links')

 

Mars data
 
Rises:

10:48am

Transits:

  4:54pm - Time of highest position in the sky, due South

Sets:

11:01pm

Constellation:

Virgo

Phase:

93.09% illuminated

Distance:

1.9883364 AU = 297,450,892 km = 184,827,418 miles = 16.56 light-minutes

Magnitude:

1.5

Apparent size:

4.71 arcseconds in angular diameter

Elongation from Sun:

52.88 (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 7/30/2010 at 9:54:11pm Mars will be 11.4 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:

10:59pm

Transits:

  5:04am - Jul 31 - Time of highest position in the sky, due South

Sets:

11:09am - Jul 31

Constellation:

Pisces

Phase:

99.28% illuminated

Distance:

4.31823161 AU = 645,998,254 km = 401,404,710 miles = 35.97 light-minutes

Magnitude:

-2.7

Apparent size:

45.65 arcseconds in angular diameter

Elongation from Sun:

124.47 (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 31, 2010 at 7:35am (The Red Spot transits about every 9 hours 56 minutes)
GRS longitude: 145.5
Jupiter moons activity (during darkness):
        Io eclipse begins on Friday Jul 30, 2010 at 11:42pm when Jupiter is 6.8 above the horizon
        Io occultation ends on Saturday Jul 31, 2010 at 3:04am when Jupiter is 40.5 above the horizon

On 7/30/2010 at 9:54:11pm Jupiter will be 13.4 below the east-northeast horizon

Click HERE for additional data on Jupiter

(back to 'Quick Links')

 

Saturn data
 
Rises:

10:47am

Transits:

  4:58pm - Time of highest position in the sky, due South

Sets:

11:09pm

Constellation:

Virgo

Phase:

99.82% illuminated

Distance:

10.11446432 AU = 1,513,102,325 km = 940,198,207 miles = 1.4 light-hours

Magnitude:

1.1

Apparent size:

16.43 arcseconds in angular diameter

Elongation from Sun:

53.05 (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 7/30/2010 at 9:54:11pm Saturn will be 13.1 above the west-southwest horizon
and will look like this in our telescopes at high power at the time of Civil Twilight...

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:

10:49pm

Transits:

  4:52am - Jul 31 - Time of highest position in the sky, due South

Sets:

10:55am - Jul 31

Constellation:

Pisces

Phase:

99.96% illuminated

Distance:

19.4598833 AU = 2,911,157,106 km = 1,808,909,184 miles = 2.7 light-hours

Magnitude:

5.8

Apparent size:

3.62 arcseconds in angular diameter

Elongation from Sun:

127.45 (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 7/30/2010 at 9:54:11pm Uranus will be 11.6 below the east-northeast horizon

Click HERE for additional data on Uranus

(back to 'Quick Links')

 

Neptune data
 
Rises:

9:31pm

Transits:

2:51am - Jul 31 - Time of highest position in the sky, due South

Sets:

8:11am - Jul 31

Constellation:

Aquarius

Phase:

100.00% illuminated

Distance:

29.06291006 AU = 4,347,749,461 km = 2,701,566,300 miles = 4.03 light-hours

Magnitude:

7.8

Apparent size:

2.35 arcseconds in angular diameter

Elongation from Sun:

159.95 (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 7/30/2010 at 9:54:11pm Neptune will be 3 above the east horizon

Click HERE for additional data on Neptune

(back to 'Quick Links')

 

Pluto (Dwarf Planet aka Asteroid 134340) data
 
Rises:

  6:06pm

Transits:

11:04pm - Time of highest position in the sky, due South

Sets:

  4:03am - Jul 31

Constellation:

Sagittarius

Phase:

99.99% illuminated

Distance:

31.03497487 AU = 4,642,766,157 km = 2,884,881,178 miles = 4.31 light-hours

Magnitude:

14.2

Apparent size:

0.11 arcseconds in angular diameter

Elongation from Sun:

145.16 (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 7/30/2010 at 9:54:11pm Pluto will be 28.2 above the south-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)
You can see that both Venus and Mercury are about to reach greatest eastern elongation,
Mercury on August 7 and Venus on August 20

(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"

(back to 'Quick Links')

Back to home page

 

Web hosting generously provided by