Astronomical Outlook for Altoona

Weather
Seasons

Highlights

  • The waxing gibbous Moon will be just 2 degrees from Saturn Monday Sept 17. Look south after dusk.
  • The autumnal equinox arrives Saturday Sept 22 at 9:54 pm EDT. This image below (click for an animated version) demonstrates how the Earth’s tilt contributes to the seasons.
  • This can also be shown with these images of the equinox and upcoming December solstice:
  • All known near Earth object passes are beyond the orbit of the Moon.
  • Mon Sep 24 22:52:24: full moon
  • Sat Sep 22 21:54:09: autumnal equinox


 

Near Earth Objects (NEO)

lunar distance (LD) is the mean distance to the moon ~239k miles. Anything within 1 LD is newsworthy. For more information see NASA’s Center for Near Earth Object Studies

This week

object

close approach date

uncertainty

LD

million
miles

2018 RE5

2018-09-15 03:45Z

< 1 sec

1.5

~0.55

2018 RQ2

2018-09-15 08:15Z

< 1 sec

9.7

~2.55

2018 RC1

2018-09-15 13:56Z

~1 hour

16.7

~4

2018 RB6

2018-09-16 04:58Z

< 1 sec

1.5

~0.55

2018 RG5

2018-09-16 18:29Z

< 1 sec

4.5

~1

2018 RA2

2018-09-16 19:04Z

< 1 sec

8.0

~2

2018 RK6

2018-09-17 10:35Z

< 1 sec

2.4

~1

2018 RQ4

2018-09-17 22:44Z

< 1 sec

11.9

<3

2018 RM4

2018-09-18 17:32Z

< 1 sec

11.0

~3

2018 RB4

2018-09-19 17:28Z

~4 hours

17.8

4+

2017 SL16

2018-09-20 21:09Z

< 1 sec

8.5

~2

2018 RH6

2018-09-22 21:04Z

~1 hour

8.6

~2

2018 RQ1

2018-09-24 22:57Z

< 1 sec

4.1

~1

Closest

within

object

close approach date

uncertainty

lunar distances

million
miles

~14 days

2018 RE5

2018-09-15 03:45Z

< 1 sec

1.5

~0.55

~1 year

2015 EG

2019-03-04 20:52Z

1+ hour

1.2

~0.55

~100 years

2010 RF12

2095-09-06 00:03Z

<2 hours

0.1

~15,290.55 miles

Planet visibility

body (phase)

rise

transit (alt)

set

constellation

Mercury (99%)

06:39:01

12:59:56 (54??)

19:19:25

Leo

Venus (28%)

10:34:30

15:31:51 (31??)

20:28:43

Virgo

Moon (52%)

14:59:29

19:53:28 (28??)

00:00:53

Ophiuchus

Mars

17:13:52

21:48:48 (25??)

02:20:31

Capricornus

Saturn

14:58:55

19:37:47 (27??)

00:20:30

Sagittarius

Jupiter

11:34:25

16:36:52 (33??)

21:42:40

Libra

Sample rise/set times for 09/17/18

Satellite Passes

This information is best used to identify passes worth sharing or skipping. Those nearest overhead are closest, brightest, and longest. Check dates and times for each pass before your share.

International Space Station (ISS)

  • good pass exits Earth’s shadow 13° above the horizon Sun 2018-09-16 05:55:05 EDT from the WNW (299°) reaches 59°, lasts 6 minutes
  • poor pass exits Earth’s shadow 23° above the horizon Tue 2018-09-18 05:50:05 EDT from the SW (234°) reaches 23°, lasts 2 minutes
  • below trees pass begins Fri 2018-09-21 19:51:53 EDT from the S (177°) reaches 18°, enters Earth’s shadow 14° above the horizon 3 minutes later
  • fair pass begins Sun 2018-09-23 19:43:20 EDT from the SSW (211°) reaches 44°, lasts 6 minutes
  • fair pass begins Mon 2018-09-24 20:27:49 EDT from the WSW (258°) reaches 40°, enters Earth’s shadow 18° above the horizon 5 minutes later
  • outstanding pass begins Tue 2018-09-25 19:35:36 EDT from the WSW (239°) reaches 73°, lasts 6 minutes

Atmospheric drag and other factors can and does cause orbits to change. See the European Space Agency supported Heavens Above for the latest pass predictions. Satellite pass gradings are based on altitude reached and duration of the pass. Higher altitude passes are closer to the observer and generally brighter as a result. Satellites other than ISS are much more difficult to spot.

Moon Phases

date

phase

Mon 2018-09-24 22:52:24

full

Tue 2018-10-02 05:45:24

last quarter

Mon 2018-10-08 23:46:50

new

Tue 2018-10-16 14:01:39

first quarter

Sun

Sunrise/set

Date

Rise

Solar noon (alt)

Set

sunlight

Mon 2018-09-17

06:56

13:08 (51.60??)

19:19

12 hrs 22 min

Tue 2018-09-18

06:57

13:08 (51.22??)

19:17

12 hrs 20 min

Wed 2018-09-19

06:58

13:07 (50.83??)

19:16

12 hrs 17 min

Thu 2018-09-20

06:59

13:07 (50.44??)

19:14

12 hrs 14 min

Fri 2018-09-21

07:00

13:07 (50.05??)

19:12

12 hrs 12 min

Sat 2018-09-22

07:01

13:06 (49.66??)

19:11

12 hrs 9 min

Sun 2018-09-23

07:02

13:06 (49.27??)

19:09

12 hrs 6 min

Mon 2018-09-24

07:03

13:06 (48.88??)

19:07

12 hrs 4 min

Tue 2018-09-25

07:04

13:05 (48.50??)

19:06

12 hrs 1 min

Wed 2018-09-26

07:05

13:05 (48.11??)

19:04

11 hrs 58 min

  • lost 0:23:52 (hh:mm:ss) of daylight over this period
  • daylight (HH:MM): 12:10
  • mean: sunrise 07:01 sunset 19:12
  • max: sun angle 51.60??

Twilight

date

rise

set

Mon 2018-09-17

05:22

20:52

Tue 2018-09-18

05:23

20:50

Wed 2018-09-19

05:24

20:49

Thu 2018-09-20

05:25

20:47

Fri 2018-09-21

05:27

20:45

Sat 2018-09-22

05:28

20:43

Sun 2018-09-23

05:29

20:41

Mon 2018-09-24

05:30

20:40

Tue 2018-09-25

05:31

20:38

Wed 2018-09-26

05:32

20:36

 

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